Conservation

Reading & Listening to Cape Cod

Cape Cod does not appear on my CV. I study alpine plant ecology — my postdoc research is literally founded on carrying heavy things to high lakes — and the hooked peninsula of the Cape, curling into Nantucket Sound and pointing back towards Boston Harbor, is mostly beach and salt marsh and very light on high ground. 

When I’m on the Atlantic coast, I am in Acadia National Park. I grew up in central Massachusetts, where by law I think every baby shower must include a hardcover copy of Make Way For Ducklings and every childhood needs one bad sunburn from a Cape Cod beach (mine was Hyannis Port). But while I haven’t thought much about the landscape of the Cape in years (haven’t visited since 2014), this past week two journalism projects brought me back and reminded me of the Cape’s outsized influence on my own career in ecology. 

First, the Cape was recently featured in a short documentary and intensely immersive online news story. Reporters from The Boston Globe spent several months this summer researching the effects of climate change on Cape Cod. They interviewed scientists, fishermen, locals, and business owners, and followed the stories of salt marshes, beach erosion, nor’easters, and changing fisheries. Nestor Ramos’ story, “At the Edge of a Warming World,” is a stunning and thorough look at climate change across the Cape, from Bourne to Provincetown. I’m teaching a course on the science of climate change for non-science majors and I rearranged my syllabus after The Boston Globe published this story. That is how much I love these pieces — five weeks into teaching a revamped course, just as I had settled into the semester, I threw out completed lesson plans so that I could devote a whole class to “At the Edge of a Warming World”. The documentary and the immersive video-and-photography online experience of Ramos’ story are only available to The Boston Globe subscribers, but you can read the story at the Pulitzer Center website — it’s part of the Center’s Connected Coastlines Initiative supporting reporting on climate change in coastal communities. 

Early in “At the Edge of a Warming World” you are introduced to Liam’s, a clam shack that stood on Nauset beach since the 1950’s, and the March 2018 Nor’easter that wiped away 80 feet of beach and damaged the understructure beneath the restaurant. The building, once set way back from the ocean, barely survived the storm and the town tore it down later in the spring. Several students in my class shared their memories of Liam’s. There was this sense that a lost clam shack suddenly brought five weeks of reading and figures from the Fourth National Climate Assessment into focus. Climate change became intensely personal. The documentary is full of these moving interviews and powerful images from the Cape. I’ve never been to Liam’s, but I felt a similar nostalgia watching the ornithologists banding whimbrels in Wellfleet salt marshes.

Cape Cod is not on my CV, but it is the first place I tried field biology. Wellfleet is a part of that geography. I can’t even remember the actual field lab assignment, but in the summer of 2000 I stood ankle-deep in cordgrass and I’ve been a field biologist ever since. 

Cape Cod is not on my CV, but I’m beginning to think it should be. My first field course was a summer marine biology program in high school with field trips to Cape Cod and the Maine coast. Looking back, the Maine coast obviously looms large — I’m currently a Second Century Stewardship Fellow at Acadia National Park. But the Cape Cod trip was foundational. I remember reading about the dance of ice sheets, morraines, and outwash plains in the USGS booklet Geologic History of Cape Cod and it was my first inkling that geology was ephemeral, that kettle hole ponds might hold clues to unravel the history of a place. 

I loved that summer course, but at the time it was hard for me to untangle my interest in field science from the general feeling of satisfaction that two of my best friends and I had engineered a way to spend the summer together, mostly outdoors, while our parents thought we were being “productive.” None of us became marine biologists. We stayed in touch with our teacher though, and in March he emailed me to say that he had a current student working on an independent project on shark, seal, and human interactions in the Cape Cod waters. This student was writing an op-ed for the Cape Cod Times, and would I mind reading it over and offering feedback? This is how I learned about the proposed seal cull, a scheme to reduce the food supply (and thus the local populations) of great white sharks. By "simply" re-writing the Marine Mammal Protection Act, the seal cull would supposedly reduce shark attacks on the Cape. (The op-ed was published in April, by the way, and I think Emma did a great job!) 

I had mostly forgotten about those spring emails and Emma’s op-ed until I began listening to Outside/In’s episode “Cold, Dark, and Sharky.” Again, I had the feeling that I possessed Cape-specific expertise that I hadn't fully appreciated, only this time it was about sharks, seal culls, and the author of Jaws. Outside/In is a podcast produced by NHPR and the Cape Cod episode dropped the day before The Boston Globe published “At the Edge of a Warming World”, but I didn’t start listening until the day I taught the Globe’s documentary short in class. When I started playing "Cold, Dark, and Sharky" on my walk back to the T after teaching I couldn’t believe the serendipitous connection — I had just spent a week re-writing my syllabus and crafting a lesson plan around climate change on Cape Cod and now I was basking in the glow of a well-taught class and listening to a new extremely well-produced story about Cape Cod. 

I have another ecological connection to the Cape. My senior year of college, I took a two-semester biology seminar called Biological Conservation on Cape Cod and the Islands. The seminar was taught by a postdoc (I haven't read this PNAS paper, but I agree that postdocs are stellar mentors). I enrolled because my major (Environmental Science and Public Policy) was biology-adjacent, my friend wanted to take it and I’d already bailed on a different seminar with her*, and there would be field trips.

This seminar taught me how to read a scientific paper (laying the foundation for #365papers, one Wednesday night meeting at a time), how to core a tree, prep the core, and measure the rings with meticulous, old school — we’re talking dissecting scope and ruler-style — precision. I learned about paleoecology and palynology and the glacial geology lessons that I’d first encountered in my high school marine biology lesson slowly resurfaced. It took another decade, but eventually I did become a paleoecologist. But first, I’d reunite with the postdoc who taught that seminar; he became a professor at Emerson College. He hired me as an affiliated faculty to teach Climate Change in 2014 while I worked on my dissertation. I returned to teach Climate Change again this fall, adding Cape Cod to the syllabus.

Looking back, it appears that Cape Cod is the landscape that circuitously led me to Emerson — and perhaps my entire career? — in the first place. Reading “At the Edge of a Warming World” and listening to “Cold, Dark, and Sharky” back-to-back has been an incredible experience. There are few more nostalgia-inducing moments than teaching your first field sites to the next generation of students. But, to be able to teach with science journalism that is so deep, so well-researched, and so beautifully produced is a whole new level of nostalgia. All the emotions associated with your place are heightened and replayed in hi-fi.

The Boston Globe and Outside/In took the landscape of the Cape and the thorny, tangled relationships between people and nature in this place, and brought it all to life. I found myself remembering an esker where I ate a half-stale muffin from the bottom of my backpack, the tourist trap in Provincetown where I got a henna tattoo of the sun on my shoulder, the bakery where we stopped on the way to the ferry to core dwarf beech trees, the low light in the New Bedford whaling museum and the bright sand dunes outside.

When I tell my origin story about how I became an ecologist, I usually talk about hiking in New Hampshire, or the childhood trip when my grandparents took me to Acadia**. I don’t think I’ve ever mentioned Cape Cod in those conversations. Clearly, I need to fact check my own origin story. I’m too completely in the choir to be the target audience for either “At the Edge of a Warming World” or “Cold, Dark, and Sharky”. In other words, I wasn’t surprised by the reporting; I was already familiar with most of the science in both stories. I had heard that you could earn a dollar per nose during the seal bounty days, understood that the waters around Cape Cod are warming faster than 99% of the rest of the ocean, knew that climate change made Nor’easters more powerful. But, I recognize that I am a weird case — the occasional academic Cape Cod enthusiast who has apparently forgotten, or maybe just never appreciated, the instrumental role of the Cape landscape in her scientific training. The power of the storytelling was so apparent when my students talked about their reactions to “At the Edge of a Warming World”.

The Boston Globe and Outside/In took these semi-familiar landscapes and crafted these stories that allowed me to see the Cape again from new perspectives. To have your original field site professionally science communicated back to you — twice! — is a really wonderful and jarring experience. I already appreciated the hard work of science communication in general, but these two stories impressed me in super-specific, place-based, deeply authentic ways. Read and listen to them — and support your own local science journalists. They may just help you re-write your CV. 

*I very much regret bailing on the other seminar — it was taught by Amitav Ghosh, and the Ibis Trilogy later became my three favorite books. My friend took both seminars; I totally could have double-seminar-ed too. Sorry, Rachel! You were right! 

**The summer after my grandparents took me to Acadia, they rented a house in Hyannis for week and what I'm learning from writing this post is that my grandmother spent my childhood picking out future field sites for me.

An ornithologist and an entomologist go into the kīpuka...

There is something magical about reading a well-written, remarkable paper from outside of your sub-discipline — the echoes of familiarity in methodology, the unpredictable overlaps, the serendipity of finding the research in the first place.

I recently found this magic in Vertical foraging shifts in Hawaiian forest birds in response to invasive rat removal, published in PLoS ONE in September 2018. Co-first-authors Dr. Erin E. Wilson Rankin and Dr. Jessie L. Knowlton transported me to the northeast slope of Mauna Loa Volcano for a bird-watching and bug-counting adventure through a network of half rat-eradicated kīpuka — a jigsaw puzzle of fragmented forest pieces dissected by lava flows. 

By most measures, I should never have read this paper. It came out while I was staggering though the first weeks of parental leave last fall. My invasive species are plants (not rats); there’s really no vertical space available (the trees are too short!) for shifts in arthropods or their predators in my plant communities at treeline; my island study site (downeast Maine) hasn’t seen volcanic activity for hundreds of millions of years (Hawaii’s kīpuka are created when volcanic lava flows move through native forests). For reasons I can’t explain, earlier this month I clicked on a link to The Wildlife Society’s — a society I’m not a part of and don’t actually follow on social media — Wildlife Publication Awards 2019 shortlist announcement. At the end of the Journal Paper category, this Hawaii study caught my eye, because I’m planning a trip there in the fall and recently spent three early morning hours driving through Iowa and Minnesota with my friend who is a postdoc at the University of Hawaii, Hilo.

Despite the winding the path to get this paper into my To Read Folder, there was a straight line from my final scroll through the Conclusions to the “compose” button on my email. I had to hear more from Drs. Wilson Rankin and Knowlton.

Here is what my initial google searches turned up: stunning photographs of kīpuka; and the discovery that the two first authors, now faculty at UC Riverside and Wheaton College, were postdocs on this project who first came to the kīpuka from the subfields of entomology (Dr. Wilson Rankin) and ornithology (Dr. Knowlton) back in 2011. The invasive rat removal efforts in their paper was a part of a larger study: 16 kīpuka fragments were methodically outfitted with trapping grids and compared to another 18 kīpuka without rat traps. “The larger study has examined how impacts by invasive predators (rats) change across a gradient of ecosystem size,” Wilson Rankin and Knowlton explained to me. “The kīpuka are a patchwork of forest fragments that were created when volcanic lava flows moved through native forests. The result is a landscape dotted with naturally fragmented forest patches that range in size from very small (<0.1 ha) to very large (>12 ha). This study system allowed us to tease apart the effects of invasive rats and the effects of ecosystem (or forest patch size) in order to better understand the forces that shape communities.” 

I asked how an entomologist and an ornithologist from different universities on the US mainland ended up working together in Hawaii. “The kīpuka project was a highly collaborative project among PIs at Stanford University, University of Maryland, Michigan Tech, and the US Forest Service that integrated multiple research fields to examine the effects of an invader on native communities.” They confirmed what google had hinted about their origin story. “We both joined this project early on as post-docs, one focusing on quantifying invasion impacts on the arthropod communities and the other focusing on the responses of native forest birds. By bringing together a research team with diverse backgrounds and expertise, the kīpuka project was able to develop a broad and in-depth understanding of how rats shape the invaded communities and alter the interactions among native species.” They ultimately found that the presence of invasive rats altered the foraging behavior of native birds — in rat-filled fragments the birds foraged higher in the canopy. The rats are not found above 6 m in the forest, but they seem to control the arthropod biomass below 6 m, suppressing the resources available for birds, especially insectivores and frugivores. In sites without rats, there was more arthropod biomass below 6 m and birds foraged at lower mean heights compared to higher foraging heights in control kīpuka.

These kīpuka are like the matryoshka dolls of island biogeography, a model system in a model system. The forest fragments are islands of habitat, and these in turn are contained within the island of Hawai‘i. I asked Wilson Rankin and Knowlton what they hoped managers in other systems could learn from this work. They write, “The fact that the kīpuka are fragments of habitat within a less hospitable matrix makes them comparable to other fragmented systems, which, as we all know, are increasingly common as human development continues to expand through natural habitats.” The kīpuka islands within islands system is special, but can still contribute to our understanding about invasive species in general. “While Hawaii is unique because of its high number of endemic species and long isolation from mammalian predators, many fragmented habitats are having to contend with extinctions of native species and invasions of nonnative species, even on the mainland. Our work shows that these invaders can alter whole trophic systems, either directly or via shifts in species’ behavior. This work helps to highlight the importance of considering the synergistic and sometimes unpredictable effects that habitat fragmentation and invasive species together can have on native food webs. We hope that both factors will be taken into account when planning restoration or conservation actions.” 

Finally, I just loved the opportunity to write about two women in STEM and their postdoc work. And I told Wilson Rankin and Knowlton that I appreciated reading a new paper covering fieldwork that concluded six years ago. My own dissertation researchfrom 2011-2013ish just reaching publication now too. As they write, “Patience and persistence are the two key words when it comes to getting your research published.” Wilson Rankin and Knowlton shared this reflection on the triumphs and low points of the journey from fieldwork to award-winning publication: “We both came onto this project as postdocs, and supervised the data collection for the three years of field research. After that we both went on to other positions, and thus had to balance writing up manuscripts from this research with the demands of new positions. Once submitted, this manuscript went through the revision process, which took some time but we are all pleased with the end product. In general, our advice to others would be to not be discouraged during the review process or its pace, as you can always improve a manuscript and the reviews are meant to help you improve your work.”

Somehow, this magical paper also brought some timely advice into my email inbox as I head into a summer of writing up first drafts of my own postdoc papers. I welcome this nice reminder to keep grinding, and to keep working with some of my fabulous peer-collaborators as they embark on new adventures and new jobs in the coming years. And of course, I am now more excited than ever to spend some time in Hawaii with conservation researchers this fall!

Reference:

Wilson Rankin EE, Knowlton JL, Gruner DS, Flaspohler DJ, Giardina CP, Leopold DR, et al. (2018) Vertical foraging shifts in Hawaiian forest birds in response to invasive rat removal. PLoS ONE 13(9): e0202869. https://doi.org/10.1371/journal.pone.0202869 

Looking for Human-Nature Connections in Seasonal Wikipedia Searches

Recently, I was wrapping up some revisions on a phenology paper and to comply with the journal’s style for taxonomy, I needed to know the authority on a species of white violets that a Maine hunting guide had noted in his diaries in the mid-twentieth century. Obviously, I turned to Wikipedia.

Ecologists who study phenology (or anything!) use Wikipedia all the time, but Dr. John C. Mittermeier and his coauthors take this practice to a whole new level in their paper A season for all things: Phenological imprints in Wikipedia usage and their relevance to conservation. This study, published in PLoS Biology earlier this month, uses Wikipedia page views to trace when humans show seasonal interest in the natural world. For over 30,000 species in 245 languages —which amassed 2.33 billion pageviews between July 2015 and June 2018 — they found some strong seasonal signals linking how and when people interact with plants and animals online.

“The idea for this study happened somewhat by chance to be honest,” Dr. Mittermeier confides. “I was collecting Wikipedia pageview data on different animals as part of another study (hopefully this should be published soon!) and on a whim I decided to plot a time-series of daily views to see what it looked like.” As an ornithologist, he was drawn to migratory bird data and his whimsical time-series plot for migratory bird page views peaked near its ecological migration season. This was the prototype for a figure in the PLoS Biology paper. Mittermeier says, “this [plot] made me curious as what other plants and animals might show seasonality in their views and how widespread these patterns might be in general.”

While searching for migratory birds on Wikipedia seems categorically different from actual birding, Mittermeier and his colleagues found strong correlations between these two activities. They compared trends in Wikipedia page views to eBird records. In this analysis, eBird frequency records are like “outdoor pageviews” of bird species. “It was easy to match the eBird taxonomy to the taxonomy used by Wikipedia,” Mittermeier says, “and the way in which seasonal abundance information was structured in eBird is very accessible.”

Birders, like Wikipedia users, are surprisingly great at generating big data. Just under half of the bird species in the dataset had page view patterns correlated with seasonal eBird records. But, for species that occurred in more than one of the four language/countries (Italy, Germany, Sweden, and the U.S.), just over a third showed a significant positive relationship between eBird frequency and pageviews across multiple languages. All of the countries in this analysis are in the northern hemisphere and experiencing basically the same seasons, so I asked Mittermeier if this result indicated that some birds are more "seasonally famous" in one location? He agreed that “some species do seem to be more “seasonally famous” than others, meaning that certain species may be viewed more as seasonal indicators. This could be a result of the behavior of the species (i.e. something about their seasonality is particularly visible and obvious), some sort of cultural context (maybe the species featured in a well known book or fairy tale and had a seasonal association there, for example), or some sort of combination of both of these. Comparing how seasonal indicator species are similar or different across languages would be a great way to gain insight into what leads to a species acquiring this significance. I think this is a fascinating question and one that would be very interesting to explore further.” 

But, the paper is not limited to birds, and human interest in animal and plant Wikipedia pages is not always aligned with ecological events. Figure 2 shows a spike in shark species page views that aligns with Shark Week. There are cultural drivers to the phenology of when humans search out certain species on Wikipedia. Mittermeier shares that, “The Wild Turkey was actually the first page that I looked at in relation to cultural events. Turkeys have such a powerful association with the Thanksgiving holiday in the United States I was curious as to whether this would impact people’s online searches (it does as we show in the figure!)” When the turkey hunch worked out, Mittermeier started brainstorming other cultural or marketing events associated with plants or animals that could impact online interest. “This was right around the time that Shark Week was going on over the summer and that’s why I decided to check if that had an impact on pageviews for Great Whites.”  

While the eBird community is full of self-proclaimed bird nerds, and eBird datahas been used inpeer-reviewed papers for over a decade, the programming around Shark Week has a decidedly different relationship to science and natural history. Dr. David Shiffman, a Liber Ero Postdoctoral Fellow in Conservation Biology at Simon Fraser University, studying how information related to sharks is spread on the internet, notes, “Shark Week has a well documented problematic relationship with the truth, spreading nonsense to its massive audience that I and other scientists have to spend years correcting.” I asked him what he thought about the Wikipedia-Shark Week connection that Mittermeier and coauthors uncovered. He says, “the temporary spike in public interest in sharks that Shark Week causes is something that the marine biology community takes advantage of to spread actual facts. This paper provides further evidence that scientists wishing to engage in public outreach about their area of expertise need to know their audience, and know that there are times of year when people are more likely to be receptive to learning about that topic!” Indeed, these seasonal patterns in interest — whether for migratory birds, Thanksgiving turkeys, or sharks — can be leveraged by conservation practitioners to affect policy and outreach.

Research into the public attitudes about species, including how they rise and fall seasonally, is important. Mittermeier and his coauthors write: “Seasonal changes in human interest in plants and animals can have an important role in conservation in at least three ways: (a) by identifying species for which phenology forms a component of their “value,” (b) by helping to reveal differences or similarities in how species are valued across cultural groups, and (c) by providing temporal awareness to help maximize the effectiveness of conservation marketing campaigns.” I’ve experienced this myself in a small way: when I publish papers on spring wildflowers in the dead of winter, the press releases don’t get much traction. 

And finally, I had to address the paradox of scholarly work based on Wikipedia. I’ve TA-ed intro Biology labs and scrawled “not peer-reviewed” next to many Wikipedia-base citations in lab reports. Mittermeier laughed with me, “My mother used to teach junior high school and was always telling her students not to cite Wikipedia and now here I am using it as the source for my research.” 

Reference:

Mittermeier JC, Roll U, Matthews TJ, Grenyer R (2019) A season for all things: Phenological imprints in Wikipedia usage and their relevance to conservation. PLoS Biol 17(3): e3000146. https://doi.org/10.1371/journal.pbio.3000146 

Hiking with Reviewer 2

This is a deep dive into my own research — the backstory behind a single line in a recently published paper and the data-driven trip down memory lane that was spurred by an innocent question from Reviewer 2. 

This research took place on Wabanaki land. I want to respectfully acknowledge the Maliseet, Micmac, Penobscot, and Passamaquoddy tribes, who have stewarded this land throughout the generations. I am certainly not the first person to devote time and energy to tracking seasonal changes on Mount Desert Island. 

This week one of my dissertation chapters, Trails-as-transects: phenology monitoring across heterogeneous microclimates in Acadia National Park, Maine, was published in the journal Ecosphere. In this project, I pulled the space-for-time trick and hiked three mountains repeatedly to collect a lot of phenology observations across diverse microclimates. The mountains in Acadia are not huge — these granite ridges roll up from the Gulf of Maine and top out at 466 m — but my transect hikes were between 4.8 km and 9.7 km each, and I wore out a pair of trail runners each season. I took to heart Richard Nelson’s advice: “There may be more to learn by climbing the same mountain a hundred times than by climbing a hundred different mountains.” 

A couple months ago, in our second round of reviews, Reviewer 2 noted, “I think that it would be useful for those wanting to replicate your transect-as-trails approach (especially land managers) to know approximately how many person hours it took to complete a transect observation, here in the main text or in the appendix.” I had a magnet (which is apparently also available as a coaster) hanging next to my desk in grad school: over a silhouette of a golden retriever with three tennis balls in its mouth, it reads: “If it’s worth doing…it’s worth overdoing.” This magnet perfectly describes my response to Reviewer 2. I sent a back-of-the-envelope estimate to my coauthors, but I couldn’t shake the feeling that the precise person hours per transect was a knowable statistic. In addition to my field notes scribbled into weatherproof notebooks, I had collected my data via fulcrum, a smartphone app that automatically recorded the time of each observation. From my cache of fulcrum csv and xlsx files, I should be able to automatically pull the time of the first and last observation of each transect. The 10.7 MB of data in my fulcrum files represented four years of field work, hours and hours on the trails, slogging through rain, snow, and sun, training field assistants, combing through patches of lowbush blueberry and mountain cranberry for the first, hidden open flower.

I became obsessed with the idea of seriously calculating person hours per transect, but I was increasingly convinced that a single number would be meaningless. I also realized that I lacked the coding chops to deal with my messy raw data: 171 files, each with 77 columns, usually containing data from a single transect, but occasionally comprising half a transect (when we had to bail due to weather) or more than one transect (when I ran ambitious double-days, or my field assistants and I split up). I turned to Porzana Solutions, and Auriel Fournier expertly helped me unlock my person hours data.Over 177 the hikes in my fulcrum files, the mean time between first and last observation is 3.51 hours.

Three and a half hours does not even begin to tell the story. This blog post is my second supplemental appendix. Here is the story of person hours per transect — the lead time, the pregnant field season, and the phenology of phenology monitoring. 

Before the first observation and after the last

There is a lead time in every transect hike. After rolling out of bed, pulling on the same old running shorts, race tshirt, and powder blue sunglasses, after packing the same handful of granola bars, dried papaya, and sharp cheddar, zipping my phone into its waterproof case, and slinging my backpack into the passenger seat, after driving to the trailhead and placing my research permit on my dashboard, there’s still a gap between the start of the fieldwork and the first official observation of the day. Especially as the summer crowds began arriving in June, I had to get out early to grab a spot at the limited parking by the north or the south end of Pemetic, or else add some extra miles from a spillover lot*. Even at the best parking spot, the approach to the Sargent South Ridge trailhead requires navigating 0.7 miles of carriage roads between the car and the trail on every hike. When I started the project in 2013, the Sequester kept Park Loop Road closed late into the spring season. For the first six weeks of fieldwork, I walked along the empty road to access Cadillac North Ridge, and Pemetic North and South Ridge.

The transect hikes were 4.8 km (Pemetic), 9.2 km (Cadillac), and 9.7 km (Sargent) up the North Ridge and down the South Ridge or vice versa (all of the mountains had uncreatively named north and south ridge trails). So at the end of a transect, I was 4.8, 9.2, or 9.7 km away from my car. I could run the carriage roads to connect the trailheads after Sargent or Pemetic (a 6.6 km run post-Sargent, and 7.2 km run post-Pemetic). From Cadillac South Ridge, a run up Route 3 to park loop road got me back to the north ridge trailhead in 10 km. Sometimes I arranged rides with friends to skip the run, and when I had funding for field assistants in 2015 and 2016 we often carpooled to drop a car at the finish line for each other. (There were some benefits to this running routine — in 2014 I won free ice cream after placing third in my age group in the Acadia Half Marathon.)

The person hours per transect statistic is limited because not every transect was a straight shot. Sometimes we had to bail 3km into a hike due to bad weather and finish the transect another day. Once, one of my field assistants took a wrong turn and recorded phenology observations on the wrong trail down Pemetic, and so I went back, retraced her steps, and picked up the right trail the next day. Once, I did a wild two-a-day and in the middle of Cadillac, I ran down the Canon Brook Trail, looped through the Pemetic transect, and then ran back up the Cadillac West Face Trail to finish Cadillac. Once, I had a friend in town and we caught a ride to the summit of Cadillac and then enjoyed the leisurely hike down the south ridge with my eight-month-old in the baby backpack.

While the time between first and last observation averaged just over 4 hours for Cadillac, 2.5 hours for Pemetic, and 3 hours and 40 minutes for Sargent, those times discount the bookends of the hikes. As much as I’m railing against the answer to my query here, the process of working with Porzana Solutions to calculate these times has been incredibly rewarding. I feel like I’m getting to know my both raw data and the tidyverse in a weirdly intimate way that goes way beyond a standard tutorial. 

The pregnant field season

In 2015 I was 17 weeks pregnant at the start of my field season. In addition to my daughter, I was also joined in the field by two field assistants. According to the Porzana analysis, I hiked less than half as many transects in 2015 (15) compared to each of the two previous years (2013: 35** hikes, 2014: 37 hikes). I actually hiked 20 transects that year — my assistants were entering the data (and getting credit for the hike in fulcrum) while we hiked together in the beginning of the season***. On my solo transects in 2015, I felt sloooooow. I averaged thirty minutes slower than 2013 and 2014 on Cadillac, 50 minutes slower on Pemetic, and 22 minutes slower on Sargent. On top of this, I was covering less ground — in 2013 and 2014 I had monitored phenology in off-trail Northeast Temperate Network plots near my transects in an effort to compare trail-side phenology with forested sites that was ultimately cut from my dissertation. In 2015, I stuck to the trails.

I remember feeling pretty terrible at the beginning of most hikes that year. I had one favorite spruce tree on the south ridge of Sargent, and I can picture myself looking up through the needles on more than one occasion from my lie-down-spot while I tried to decide if a bite of granola bar would make me feel more or less nauseous. As I climbed above treeline and into the breeze the fog of morning sickness would lift, and as I hiked downhill, my daughter would do this funny little fetus-roll and kick in a way that I interpreted to be happy.

Hiking while pregnant was hard, but it felt easier than grappling with the looming challenges of becoming a parent. I liked the hard of fieldwork, it was the kind of hard that I felt capable of conquering. I also loved being pregnant in Bar Harbor. It was my fifth field season in Acadia and I had this wonderful community of supportive colleagues and mentors at the park service and in town. I had a favorite yoga class, a favorite milkshake, a favorite iced chai and blueberry muffin spot. I also had two field assistants — my pregnancy fortuitously aligned with NSF funding! — and working with Ella and Natasha that season was great. The person hours per transect figure obscures my field assistants, folding us into each other and masking the time we spent training together on the ridges. It also hides my pregnancy in the averages. I want to recognize those extra 22-50 minutes: they were some of the best worst minutes of my PhD.

The phenology of phenology monitoring

The person hours per transect average doesn’t show the sprint finishes of June. I monitored thirty species (the paper highlights the 9 most common taxa) of spring-flowering plants. On the transect hikes, I recorded leaf out and flowering phenology. In April, this was a bit of a scavenger hunt, and I’d pour over thickets of shrub stems for the first sign of bud break, then in May I’d peek into each curled Canada mayflower leaf for flower buds. By early June, my plants had leafed out, and the flowering season was winding down. I knew the trails by heart, and the location of each focal taxa along the ridge was bright in my mental map; each transect became a point-to-point trail run between the last phenological hold outs. Did the rhodora finish flowering on Cadillac? Had the last sheep’s laurel buds opened on Pemetic? Were the blueberries beginning to ripen below Sargent’s summit?

As I followed the spring phenology, I grew faster, my calf muscles more defined, my appetite more voracious. Acadia’s steep climbs will whip you into shape. I remember in 2013 arriving in the field a month after passing my comps and feeling so sluggish after a winter of studying instead of running. In comparison, I ran hard in the winter of 2013-2014, set a personal best half marathon time in a trail race in March, and just cruised through the early season field work in 2014. Even in 2015, as I grew rounder each week, I also grew more comfortable with the trails. Hiking while pregnant became easier over the season, although I’m happy it ended when it did, because that trend was not sustainable into the third trimester. 

I think about Reviewer #2 and I want to ask: do you mean the person hours per transect in April? Or at the end of June? What kind of mileage were you averaging before the start of the field season? Do you have any old hamstring injuries? Tell me about your field assistants. Do you like to stop for lunch at the summit or are you an on-the-go-snacker? Did you pack a couple bucks to buy a Harbor Bar at the Cadillac souvenir shop? Are you saving your energy for the 10k run at the end of the transect? Is the National Park Service well-funded in this year’s federal budget? How do you feel about stopping for a swim in Sargent Mountain Pond?

I love these questions because each one pulls on a thread winding through my Acadia memories. I hiked upwards of 125 transects between 2013 and 2016, and now that the paper is done, I’m a little sad to be shelving the fieldnotes for good. The trail runners that I wore are long gone, my field hat fell apart, most of my baggy race tshirts carried me through my second pregnancy and suffered for it.

In the end, the idiosyncrasies of the hikes were smoothed and flattened into the sentence, “Each transect could be completed in under 6 person-hours.” This is both true and wildly circumscribed. Not unlike a well done chapter of a PhD dissertation.

*Acadia National Park actually closed the lot by the Pemetic North Ridge trailhead in 2017 and it’s now exclusively a bus stop for the island explorer, the free bus that begins running right as my season wraps up at the end of June.

**This doesn’t include hikes before I had figured out the fulcrum platform. There was "no" data on those hikes (nothing was leafing or blooming, no signs of budburst) and they only exist in my field note books.

***I hired three field assistants for this project and, concurrently, a common garden experiment. In 2014, Paul was my garden guy, but we also hiked two transects together and he hiked two solo. In 2015, Ella, Natasha, and I split the transect and garden work. Ella came back for most of the 2016 season and then I finished the two projects solo in June 2016.

National Parks are Hot Spots

In this space, I’ve often shared my love for National Park-based research. I count myself among the researchers devoting time and energy to documenting how climate change affects the ecosystems and natural resources in U.S. National Parks; we study everything from pikas to forests, Joshua trees to birds. But, the underlying rate of warming in these National Parks was not on my radar and I had not given much thought to the climate exposure of National Parks versus the rest of the United States. It turns out, the parks are literal hotspots on the landscape.

Last fall, Dr. Patrick Gonzalez and coauthors from the University of Wisconsin published ‘Disproportionate magnitude of climate change in United States national parks’ in Environmental Research Letters. This study looked at historical and projected temperature and precipitation across all 417 U.S. National Parks. Between 1895 and 2010, mean annual temperature of the national park area increased at double the U.S. rate — parks warmed by 1.0°C (±0.2°C) per century, the rest of the U.S. land area by 0.5 °C.Dr. Gonzalez is a forest ecologist and Associate Adjunct Professor at the University of California, Berkeley. He is also the Principal Climate Change Scientist of the U.S. National Park Service, but he answered my questions here under his Berkeley affiliation, not for the Park Service.

I asked why he wanted to study a spatial analysis of historical and projected climate across all 417 US National Parks. What was the motivation for expanding on the earlier work of researchers who presented similar findings for the 289 large parks in the National Park System system?

“Up until our research, the severity of climate change across all the US national parks was unknown.” Gonzalez writes. “The previous work had only looked at subsets of parks. I work at a national level and it is important for me to give national policy-makers scientific information that is robust and comprehensive. The time-consuming parts of the work were the individual analyses by park and the computational tasks of downscaling all available general circulation model output of future climate projections to 800 m spatial resolution, which had not previously been accomplished for the U.S.”

In addition to the climate exposure of National Parks, Gonzalez and his team considered climate velocities. Climate velocity is the speed at which a plant or animal will need to move, migrate, or disperse — usually north or upslope — to “catch up” to their climate as it changes. Gonzalez found an interesting paradox in climate velocities: the park lands have experienced extreme temperature and precipitation shifts, but they also show lower climate velocity than the U.S. as a whole. They point out that this does not mean that plants and animals in National Parks are not in peril: “The lower climate velocities in the national park area are an artifact of that indicator being calculated as horizontal movement of areas of constant climate. Climate velocity can underestimate exposure in mountains.”

The National Parks are more mountainous than the rest of the United States. This is a reflection of our unsystematic history of serendipitous-style protection; we collect the pretty places as national parks, without considering the underlying biophysical diversity, and mountains are very pretty places. So while moving a couple meters upslope might seem easier than moving hundred of meters north to track a suitable climate, this is often an oversimplification. “Despite the computational artifact, our results indicate that projected climate velocities in national parks could exceed maximum natural dispersal capabilities of many trees, small mammals, and herbaceous plants.” Gonzalez elaborates, “Any new protection of natural areas, whether close to or far from national parks, can add to global conservation of ecosystems for biodiversity and human well-being.”

I asked Gonzalez if he had any thoughts on how the research could be interpreted for park visitors. I wanted to know if there is an effort to get this work not just to park managers on the ground, but to interpretive staff as well. “For national park interpreters, I’ve given many presentations directly to staff in individual parks, including interpreters,” he says. “I encourage all U.S. National Park Service staff to speak about the robust science of climate change and its human cause, which points us to solutions to saving America’s most special places.”

Finally, I noticed that both this paper and the earlier National Park System climate exposure study, which covered 289 large parks, were published in open access journals. I asked if this was an intentional pattern and these research teams were hoping to reach managers who may not have access to peer-reviewed journal articles.

Gonzalez confirmed that, “the open access of the journal of course enabled a much larger audience to directly download and read the original work. This greatly benefited national park staff and other natural resource managers, to whom we aimed to provide information useful for conservation under climate change. Intense interest immediately developed – people downloaded the pdf file more than once a minute in the first 24 hours of publication.”

But their outreach was not limited to open access journals. Gonzalez points out, “public media published over 40 individual stories, including in the Washington Post, on page 1 of the San Francisco Chronicle, on public radio stations, and on television." Gonzalez also wrote a concise summary for the website the Conversation. He says that the University of California, Berkeley, has greatly helped in the effort to reach natural resource managers by publicly posting the spatial data, and he directly provided customized analyses and maps for numerous individual national parks.

Finally, Gonzalez writes, "I just presented the results to the U.S. Congress in a hearing where I testified on human-caused climate change in U.S. national parks. The open access of the journal was critical, but we engaged a broader effort to widely communicate the science.”

Thank you to Dr. Gonzalez and his colleagues for providing the climate data that underlies so much ecological research across the National Park System! And thank you for modeling effective outreach and impressive science communication*! 

References:

Gonzalez, P., Wang, F., Notaro, M., Vimont, D. J., & Williams, J. W. (2018). Disproportionate magnitude of climate change in United States national parks. Environmental Research Letters, 13(10), 104001–13. http://doi.org/10.1088/1748-9326/aade09

Monahan WB, Fisichelli NA (2014) Climate Exposure of US National Parks in a New Era of Change. PLoS ONE 9(7): e101302. https://doi.org/10.1371/journal.pone.0101302 Banner image: photos by Jodi Kurtz, Via Tsuji, and Gabriel Millos, Creative Commons 

*if I ever publish a paper that averages one pdf download every minute, I will throw the biggest party and give everyone temporary tattoos of the figures.

Bumble and Bumble: what’s black and yellow and maybe more than one species?

During the dark afternoons of December in New England, I like to scroll through my old field photos and think of all the green, growing things I’ve measured in beautiful places during those long-ago long-lit seasons. Yesterday I flipped through a couple field photos from a friend — “Photos of younger Jon! :)” he wrote in the email — and the same sunny feelings flooded in.

As a master’s student*, Dr. Jon Koch and his insect net chased bumble bees all over the western United States. He was studying bumble bee decline, but hit weird hurdle: a messy species boundary between two bumble bees. Taxonomists and field guides were torn on whether Bombus fervidus was or was not Bombus californicus. These two “species” in the Bombus fervidus species complex were nearly morphologically identical, except for their color patterns: B. fervidus is noted as usually mostly yellow with a little black, while B. californicus sports mostly black with some yellow in variable detail. They were maybe different species, maybe hybridizing, or maybe the same thing with different color morphs. As Jon explained to me, “If we don’t know what the species are, how will we manage them? Bumble bees are differentially sensitive to land use change, disease, etc. The bumble bees in the Bombus fervidus species complex are found to be impacted by one disease, Nosema bombi, but perhaps differently. Therefore, it is important to recognize what the species boundaries are because estimates of infection prevalence might be not be done correctly due to the inability to tell the species apart.” 

Jon wanted to bring some clarity to the species complex by providing some new molecular evidence with broader taxa sampling. His new PLoS ONE paper, “Phylogeny and population genetic analyses reveals cryptic speciation in the Bombus fervidus species complex (Hymenoptera: Apidae)” delivers on the broader taxa sampling — 320 specimens from 53 sites — but the clarity is a bit of a cliff hanger. During the fieldwork, Jon and his coauthors keyed out identifications for their bees based on the setal color, and also took a tarsal clipping from the mid-leg for DNA extraction and microsatellite genotyping. When they compared field identification to the genotypes, they had an ID rate of just under 94%. Jon and I agree that that’s a pretty good record for fieldwork with cryptic species** but he adds, “it’s also cool to think that 6.2% of the time we were wrong! These bees are great at fooling us.” 

The bees that were fooling Jon were B. fervidus dressed as B californicus and vice versa. In Pinnacles and Yosemite National Parks there were ten mostly black bees (the typical B. californicus look) that turned out to belong to the genetic cluster that usually wears mostly yellow. The rest of the bees with black setal coloration belonged to another clade based on genotype, though this clade also included some bees in yellow. I asked Jon, “What is going on with the bee costume parties in Pinnacles and Yosemite?” His wild speculation is that little black dress is the dominant phenotype for bees in these parks, and the typically-yellow-genotype wears black here because everyone else is doing it: “bumble bees are notorious for converging on a local phenotype, which can even make it very hard to tell distantly related species apart.” However, in the sites where both genetic clusters of the B. fervidus species complex overlap, they usually do not look alike, so they aren’t mimicking each other. 

Ultimately, Jon’s team determined that the species complex comprised two lineages, but that both lineages exhibit the yellow and black phenotypes depending on geography. So while the B. fervidus species complex is not a single species, B. fervidus and B. californicus are not NOT conspecifics. Jon explains, “those names [B. fervidus and B. californicus] might not even be valid! The holotype of B. californicus happens to be where the genotype assigned to the “B. fervidus” was collected in the Sierra Nevada.” In short, the original bee that taxonomists knew as B. californicus may actually be genetically on the B. fervidus side of the lineage, and eventually one or both names might need to be thrown out.

This “it’s complicated” conclusion might be depressing news for someone who dedicated so much time and energy towards disentangling the species complex, but Jon closes his email to me with a happy emoji “nature has so many surprises, and science is an ongoing process :)” In the meantime, this paper points out that even if we don’t have the right names in place, we know enough to recommend that managers use Jon’s non-lethal method of clipping a bit of mid-leg for genotyping, and monitor the two clades of the B. fervidus complex separately. This is a great reminder for all of us in conservation research: we need to keep the ongoing process in perspective, while also delivering our findings, however not-quite-as-clear-as-we-hoped or maybe-unnamed as they may be, to our partners in management and policy. 

References:Koch JB, Rodriguez J, Pitts JP, Strange JP (2018) Phylogeny and population genetic analyses reveals cryptic speciation in the Bombus fervidus species complex (Hymenoptera: Apidae). PLoS ONE 13(11): e0207080. 

*Now, old Jon and old Caitlin are David H. Smith postdoctoral fellows together :)

**see McDonough MacKenzie et al. 2017 — When I was a master’s student working with volunteer-collected data I would have killed for a 93.8% identification rate. One my species, Labrador tea, was correctly identified 27.3% of the time. This is not a cryptic species; it doesn't sometimes dress up as Diapensia. 

Up All Night

 As a parent to a newborn, I was drawn to the recent PLoS ONE paper ‘Creeping in the Night.’ I’m creeping in the night all the time — but I don’t get the excitement of working with mongoose, full moons, and unexpected den visits.

Drs. Carol Anne Nichols and Kathleen Alexander documented nocturnal behavior in a diurnal species when their camera traps captured some surprising late-night activity. Their paper, Creeping in the night: What might ecologists be missing? is part natural-history-note and part call-to-action for ecologists to shake off our perceptions of how animals partition their days and nights. As a reader, I came for the sleepwalking mongoose, but I stayed for the existential questions of how we structure our research activities and when binary traits might actually be blinders. 

Nichols and Alexander have been studying banded mongoose behavior in Northern Botswana for years. The project began in 2000, Alexander joined as a field ecologist in 2014, and in 2016 they began camera trap research as a means to study behavior without observer presence. I asked if the den site selection for the camera traps, which spanned urban areas and natural habitats, was serendipitous or it they had intentionally radio-collared urban and country mongooses. They told me that they studied mongoose troops in “town” (ie urban areas of Kasane and Kazungula) and “park” (Chobe National Park) habitats to “understand how different landscapes influence wildlife behavior and potential impacts that could impose on pathogen transmission dynamics.” Within a month of deploying the camera traps, they caught a mongoose outside of a den at night on film.

“It was certainly an amusing discovery to find so early in the project,” says Nichols. “We were excited to see if more nocturnal detection were to come, or if, as we joked, that first mongoose was just sleepwalking.” After 215 trap days, they had photographs of mongooses at night from 7 trap days. Among these photographs, there was no pattern of more night-activity among town (vs. park) habitats or moonlit (vs. dark) nights. In at least two photos, a mongoose appears to be sneaking around a den of another troop. In a scene that could be the trailer for a mongoose-version of COPS, a series of photos captures one mongoose approaching a den at night, another mongoose emerging from the den, the ensuing chase, and hours later, a single mongoose returns.

Nichols and Alexander say they are now deploying more cameras in hopes of understanding ringed mongoose nighttime behvavior. “This discovery has changed the way we thinking about mongoose,” they write. “There is much more happening! This discovery has made us question all our assumptions. The mystery continues!”

In the same month that Nichols and Alexander published Creeping in the Night, Dr. Kaitlyn Gaynor and colleagues published the meta-analysis The influence of human disturbance on wildlife nocturnality in Science. Gaynor compiled 76 studies comprising 62 mammal species from across the globe to explore how daily patterns of wildlife activity responded to different types of human disturbance, including vehicles, resource harvesting, development, and recreation. Each study in the meta-analysis included data on animal nocturnality under conditions of low and high human disturbance. They found that across all the different types of human impacts, the mammals showed a significant increase in nocturnal activity compared to mammals in low-impact habitats.

This contrasts with the ringed mongoose — Nichols and Alexander’s data were not included in the meta-analysis, but they found no difference between the human-impacted town den sits and the park sites in mongoose night time activity. Nevertheless, at least in habitats marked by human disturbance, mongoose might not be the only so-called diurnal mammals creeping in night. This pattern of nocturnal behavior among mammals that we thought were diurnal calls into question the traditional dichotomy between day-time animals and night-time animals. In their Discussion, Nichols and Alexander write that this “limited approach [only looking at day time behavior] may fail to capture data critical to understanding the ecology, biology of a species, and the temporal nature of space use.” As she reviewed their photos, Alexander recalled Samuel Sneiders’ “The theory of ecology” — “specifically that heterogeneity was an underlying phenomenon of ecology. In our writing, we wanted to emphasize that these unexpected events are really the interesting nuggets of new discovery!”

The Discussion encourages ecologists to be open to temporal heterogeneity with references to classic ecological work in spatial heterogeneity. This connection made me think of a recent essay in Current Biology: Are the ghosts of nature’s past haunting ecology today? Here, Dr. Brian Silliman and coauthors explore trends of rebounding populations of large-bodied consumers. These species —for example, sea otters and alligators — seem to be expanding into habitats that ecologists thought were beyond their niche space. Often this is beause we decimated their populations before thoroughly studying their original ranges, and we’re working with incomplete baseline data. In both cases — spatially with rebounding sea otters and alligators and temporally with ringed mongoose — this limits our ability to provide recommendations for management and conservation. As Nichols and Alexander write, “This work emphasizes the idea that you don’t know what you don’t know.” They encourage researchers to:

Push the envelope and see what you find. It might make all the difference in your approach to management and effective conservation of a species. With mongoose, we realize that between group dynamics and contacts are more complicated than we thought with these nighttime excursions and we need to understand the drivers of this behavior to understand disease transmission in this population — a critically important management objective.

For me, during those rough 4 am feedings, it's weirdly comforting to think, maybe there's a mongoose out there who is also awake right now. But, as I look forward to returning to my own research next semester, I will be thinking about Nichols and Alexander's big question What might ecologists be missing? and working to better define the edge of my assumptions around my study system, species, and methods. 

References:

Nichols, C. A., & Alexander, K. (2018). Creeping in the night: What might ecologists be missing? PloS One, 13(6), e0198277–7. http://doi.org/10.1371/journal.pone.0198277

Gaynor, K.M., Hojnowski, C.E., Carter, N.H. and Brashares, J.S. (2018). The influence of human disturbance on wildlife nocturnality. Science, 360(6394), pp.1232-1235.

Silliman, B. R., Hughes, B. B., Gaskins, L. C., He, Q., Tinker, M. T., Read, A., et al. (2018). Are the ghosts of nature’s past haunting ecology today? Current Biology, 28(9), R532–R537. http://doi.org/10.1016/j.cub.2018.04.002

Summer Reading (Part 2)

Last week I wrote about my favorite new papers on mountains and phenology after a summer of scientific reading. In the second half of my top ten list, I’m highlighting some plant mysteries and best practices of 2018. 

“Plant mysteries” is a label that I’m using to lump together three plant papers that I can’t stop thinking about. They cover some of my favorite methodological quirks — historical field notes, herbarium digitization, citizen science — and two genera that I think are cool — Sibbaldia and Erythronium. The mysteries range from: Is this still here? to Why is this here in two colors?  to Can I get this specimen to tell me what else grew here? without much thematic overlap, but all three papers tell gripping stories. If nothing else, they share a strong natural history foundation and well-executed scientific writing that made for lovely hammock-reading.

“Best practices” are just that — descriptions of how we can improve our science as individuals and collectively. We can design better spreadsheets for our data and we can support gender equity in our scientific societies. I strongly recommend that all ecologists read up on both. 

Plant Mysteries

I didn’t particularly notice [trophy collecting/associated taxa/pollen color polymorphism] before, but now I can’t not see it…

1. Sperduto, D.D., Jones, M.T. and Willey, L.L., 2018. Decline of Sibbaldia procumbens (Rosaceae) on Mount Washington, White Mountains, NH, USA. Rhodora, 120 (981), pp.65-75.

I love this deep dive into the history of snowbank community alpine plant that occurs in exactly one ravine in New England (though it’s globally widespread across Northern Hemisphere arctic-alpine habitats). Over the past four decades, surveys in Tuckerman’s Ravine have documented a continuous decline in the abundance of creeping sibbaldia, and recently researchers have been unable to find it at all. This would make creeping sibbaldia the first documented extirpation of an alpine vascular plant in New England. Dr. Daniel Sperduto and coauthors revisit the photographs and notes from contemporary surveys and find that mountain alders are encroaching on the creeping sibbaldia’s snowbank habitats. These notes also include anecdotes of local disturbances like turf slumping at the sites where creeping sibbaldia used to be found. In herbaria across New England, Sperduto and coauthors discovered sheets covered with dozens of specimens — this “trophy collection activity” in the 19th century led them to calculate that “there are more than three times as many plants with roots at the seven herbaria examined than the maximum number of plants counted in the field within the last 100 years.” I am obviously partial to New England alpine plants, and I got to see Sperduto present this research as a part of an engaging plenary session at the Northeast Alpine Stewardship Gathering in April, so you could write this off as a niche interest. Despite this, I see creeping sibbaldia as a lens for considering the universal mysteries of population decline and extirpation, and the challenges of tying extirpation to concrete cause-and-effect stories. 

2. Pearson, K.D., 2018. Rapid enhancement of biodiversity occurrence records using unconventional specimen data. Biodiversity and Conservation, pp.1-12.

Leveraging herbarium data for plant research is so hot right now. But what if you could squeeze even more information from a specimen label? For example, many collectors note “associated taxa” along with the date and location of collection. The associated taxa are plants that were seen nearby, but not collected — a kind of ghostly palimpsest of the community that grew around the chosen specimen. Herbaria across the globe have spent the past decades digitizing specimens and uploading photographs of their pressed plants. In this process, the associated taxa on specimen labels are often stored in a ‘habitat’ database field. In this impressive single-author paper, Dr. Kaitlin Pearson extracts the associated taxa data from Florida State University’s Robert K. Godfrey Herbarium database with elegant code that can recognize abbreviated binomial names and identify misspellings. She then compared the county-level distributions of the associated taxa database with their known county-level distribution from floras and herbarium specimens. Incredibly “the cleaned associated taxon dataset contained 247 new county records for 217 Florida plant species when compared to the Atlas of Florida Plants.” There are plenty of caveats: the associated taxa can’t be evaluated for misidentification the way a specimen can, and lists of associated taxa are obviously subject to the same spatial biases as herbarium specimens. But this is clearly a clever study with a beautifully simple conclusion: “broadening our knowledge of species distributions and improving data- and specimen-collection practices may be as simple as examining the data we already have.” 

3. Austen, E.J., Lin, S.Y. and Forrest, J.R., 2018. On the ecological significance of pollen color: a case study in American trout lily (Erythronium americanum). Ecology, 99(4), pp.926-937.

Did you read Gelman and Hill’s Data Analysis Using Regression and Multilevel/Hierarchical Modelsin a seminar and think, this seems like an amazing resource but I’m an ecologist and examples about school children watching Sesame Street or election outcomes and incumbency for US congressional election races just don’t resonate with me? The ecological and evolutionary mystery of red/yellow pollen polymorphism is super interesting in its own right and Dr. Emily Austen and coauthors thoroughly attack this question. For me — and I’ve admitted here before that I am the kind of learner who benefits from repetition  — Austen’s statistical methods are the star. Austen demonstrates glm best practices and brings stunningly clear plant ecology examples to the Gelman and Hill framework. I would probably teach this paper in a field botany course (trout lilies are charismatic! look at this fun map of pollen color polymorphism!), but I would absolutely prefer to assign it in a statistical methods course, especially as a supplement/set of alternative exercises to Gelman and Hill. 

Best Practices

Do this…

1. Potvin, D.A., Burdfield-Steel, E., Potvin, J.M. and Heap, S.M., 2018. Diversity begets diversity: A global perspective on gender equality in scientific society leadership. PloS one, 13(5), p.e0197280.

Gender equality in biology dramatically decreases as you look up the ladder in academia — compare the gender breakdown in the population of graduate students to tenured professors and gender disparity is stark. Leadership in our field is still heavily male skewed. Dr. Dominique Potvin and her coauthors asked, is this true in scientific societies too? Scientific societies are generally more open than academic departments, and there is more transparency in the process of electing governing boards and leadership positions. Potvin and coauthors leveraged these traits to ask: what is the role of scientific societies in rectifying gender inequity? why are some societies better than others at promoting women in leadership? After considering 202 societies in the zoological sciences, they found that the culture of the society — the age of the society age, size of its board and whether or not a it had an outward commitment or statement of equality — was the best predictor of equality in the gender ratio of society boards and leadership positions. This “outward commitment or statement of equality” covered anything published on the society website — a statement, committee, or other form of affirmative action program — that “implies that the society is dedicated to increasing diversity or improving gender equality.” Of the 202 societies they studied, only 39 (19.3%) had one of these visible commitments to equality. Whether societies with high proportions of female board members were more likely to draft and publish these statements, or whether societies that invested time and energy in producing such commitments attracted more women to leadership positions is a bit of a chicken-and-egg riddle. Societies looking to reflect on their own state of gender equality can take advantage of the resource presented in Table 6: “Health checklist for scientific societies aiming for gender equality.” Assessing gender equality is kind of a low hanging fruit — and the authors encourage societies to reflect on intersectionality and race, age, ethnicity, sexuality, religion and income level as well. Basically, if a scientific society is struggling to support white women in 2018, there’s an excellent chance it is failing its brown, LGTBQ, and first-generation members to a much greater extent.

2. Broman, K.W. and Woo, K.H., 2018. Data organization in spreadsheets. The American Statistician, 72(1), pp. 2-10.

If I could send a paper in a time machine, I would immediately launch Broman and Woo’s set of principles for spreadsheet data entry and storage back to 2009, when I started my master’s project. Reading through this list of best practices made me realize how many lessons I learned the hard way — how many times have I violated the commandments to “be consistent”, “choose good names for things”, or “do not use font color or highlighting as data”? Way too many! Eventually, I pulled it together and developed a data entry system of spreadsheets that mostly conforms to the rules outlined in this paper. But, if I’d read this first, I would have skipped a lot of heartache and saved a lot of time. This is an invaluable resource for students as they prepare for field seasons and dissertation projects. Thank you Broman and Woo, for putting these simple rules together in one place with intuitive and memorable examples! 

Happy Fall Reading! 

Summer Reading (Part 1)

We’re rushing out of the dog days of summer and into the start of a new semester — or in my case the start of parental leave, which is a little bit like embarking on a new semester at an unknown campus and while I completed the newborn syllabus three years ago, I have this sinking feeling that I don’t even know which classes I’m enrolled in yet. Regardless, I’m reflecting on my summer reading.

Over June, July, and August, I was all in on #365papers and I have a top ten list of scientific papers from these long summer days of slow reading. Because my “semester” might start at any moment, I’m breaking this post into two parts. First up: my favorite hot-off-the-press summer reads on mountains and phenology.

On Mountains

Think globally & way into the past…

1. Iglesias, V., Whitlock, C., Krause, T.R., Baker, R.G., 2018. Past vegetation dynamics in the Yellowstone region highlight the vulnerability of mountain systems to climate change. Journal of Biogeography 45, 1768–1780. doi:10.1111/jbi.13364

Fifteen pollen records covering 16,000 years and the 80,000 km2 mountainous Greater Yellowstone Ecosystem create an incredible review of elevational patterns of vegetation change in an iconic mountainous region. In this paper, Dr. Virginia Iglesias lays out the challenges of quanitifying pollen-vegetation relationships in mountain regions (aka what I didn’t know when I proposed my postdoc research) and then pulls in a staggering amount of modern and fossil pollen data to recreate the history of Yellowstone’s dominant conifers. These are stories of both stability and rapid change through past climatic changes with conservation implications for managers facing anthropogenic climate change. My favorite line: “The current vegetation distribution is, at best, a short and rather anomalous baseline for evaluating ecological responses to future climate change.” 

2. Elsen, P.R., Monahan, W.B., Merenlender, A.M., 2018. Global patterns of protection of elevational gradients in mountain ranges. PNAS 115, 6004–6009. doi:10.1073/pnas.1720141115

This study has it all: mountain biodiversity love, protected area planning, big data analysis, and beautifully designed maps of “elevational protection” across the globe. Full disclosure: Dr. Paul Elsen is a fellow Smith Fellow and I also got to see this paper as a speed talk at the North American Congress for Conservation Biology in July. The bottom line is this: when you zoom out, most of the world’s mountain ranges are narrowly protected — we need conservation across elevation gradients to effectively protect species under climate change. 

On Phenology 

Wherever you get your phenology data (maybe from TV?) scientists are asking some really interesting questions about community composition, temporal dynamics, and the implications of climate change on interspecific relationships…

3. Carter, S.K., Saenz, D., Rudolf, V.H.W., 2018. Shifts in phenological distributions reshape interaction potential in natural communities. Ecology Letters 30, 133–9. doi:10.1111/ele.13081

Amphibian breeding phenology is not the kind of phenology that I study — I don’t install recorders at ponds to capture EPs of overnight breeding calls, I don’t log hours listening to the audio to identify twelve different amphibian species and record the number of individuals per species calling during each recording session, and I certainly have not done this tirelessly for fifteen years. But I’m so glad that Dr. Shannon Carter and her colleagues did because their ingenuous analysis of changes in the timing of calling between pairs of amphibian species has huge implications for how we — plant phenology people included! — study phenological mismatch. The overlap (or "phenological distributions") of amphibian breeding calls has shifted in weird and non-uniform ways, and metrics like ‘first day of calling’ or ‘median call date’ don’t capture these changes well. This is just a great analysis of a grinder ball dataset (8 ponds in Northeast Texas, monitored consistently over 15 years) which opens up a window to these big questions — How do we monitor phenology? What information do we need to know that temporal mismatch is occurring?

4. De Frenne, P., Van Langenhove, L., Van Driessche, A., Bertrand, C., Verheyen, K., Vangansbeke, P., 2018. Using archived television video footage to quantify phenology responses to climate change. Methods Ecol Evol 149, 1791–9. doi:10.1111/2041-210X.13024

Dr. Pieter De Frenne and his coauthors have received tons of press coverage (best sub-headline: "ignore the lycra—look at the flowers") for this incredibly photogenic work. They basically watched 200 hours of TV (old coverage of the Tour of Flanders), justified this as “research” by grabbing screen shots of 46 shrubs and trees from along the cycling course, and found surprisingly strong advances in the timing of spring leaf out and flowering in these plants over the years. This is, on one level, the opposite of Carter et al listening to frog calls for fifteen years — the phenology monitoring here is opportunistic and there is only a single metric each year (what was happening on the day they filmed the Tour). But as De Frenne points out at the end of the paper: “Probably the most promising way forward for phenology research is to better integrate all types of phenology data…observational time series, experimental manipulations of climate, herbarium records, historical surveys of vegetation, historical maps, repeat photographs and other, yet unexploited, sources such as television video footage from broadcast archives.” 

5. Winkler, D.E., Butz, R.J., Germino, M.J., Reinhardt, K., Kueppers, L.M., 2018. Snowmelt Timing Regulates Community Composition, Phenology, and Physiological Performance of Alpine Plants. Front. Plant Sci. 9, 631–13. doi:10.3389/fpls.2018.01140 

Dr. Daniel Winkler, PLoS ESA Reporting Fellow 2016, tweeted out his new paper in July and he had me at “community composition, phenology, and physiological performance of alpine plants.” My “alpine-ish” communities include true alpine on Katahdin, but also Cadillac Mountain in Acadia, which is a whopping 1,530’ and more accurately described as ‘Northern Appalachian-Acadian Rocky Heath Outcrop’ by NatureServe. I’m definitely interested in the differences between alpine-restricted species and wide-ranging species. Winkler’s team recorded species diversity, flowering phenology, and physiological measurements including gas exchange, net CO2 assimilation, and stomatal conductance across plots along an elevation and aspect gradient in the Colorado Rockies. Two results jumped out at me: the alpine-specialists displayed less flexible flowering phenologies than the wide-ranging species, but there were not strong differences between these groups in physiology. This is the kind of paper that inspires mad grant writing — I'm interested but skeptical, will this hold up in my pet region/ecosystem/study system? I want to replicate this kind of research in the Northeast — and across a gradient of sites where phenology is tied to snowmelt (true alpine areas of Katahdin and the Presidential range), and where the two are (I think) decoupled (Cadillac Mountain). Winkler and I wrote a blog post together in 2016, I think I can convince him to collaborate on a larger scale — and get him to New England! 

Bonus “Reads”

Recent podcast episodes tangentially related to recent blogging

Pikas Meet Cute: Two Subspecies, One National Park

The National Park Service is wrapping up celebrations on its 102nd anniversary this August. I’m unabashedly biased towards park science: my dissertation and my postdoc research are both Acadia-based, while cleaning out old papers last week I actually paused for a moment before recycling a torn up, coffee-stained copy of a National Park research permit from 2013. (Don't worry, the original pdf is safely stored on an external hard drive.)

I’d report on the hybridization of pikas in Rocky Mountain National Park even without the excuse of a belated happy birthday to the National Park Service, but clearly covering research on pikas and #poopscience is the perfect way to honor the stewards of our public lands. There are charismatic megafauna (mini-fauna?) and there are charismatic landscapes, and the scientists who study pikas in the western National Parks enviably have cornered the market on both. Dr. Jessica Castillo Vardaro just published new research on the population genetics of American pikas in PLoS ONE last month. In “Identification of a contact zone and hybridization for two subspecies of the American pika (Ochotona princeps) within a single protected area” Castillo Vardaro and coauthors analyze the DNA in pika poop to pinpoint where the northern and southern Rocky Mountain lineages of these rabbit relatives meet. Their pika #poopscience spanned samples from Grand Teton National Park, Great Sand Dunes National Park, and Rocky Mountain National Park.

Before Castillo Vardaro’s work, there was some evidence that the northern and southern Rocky Mountain pika subspecies had a historic contact zone somewhere near-ish Rocky Mountain National Park. However, Castillo Vardaro wasn’t looking for a contact zone or hybrid pikas when she began working on the Pikas in Peril (PIP) project — a team of National Park Service staff and academic researchers. Pikas are a bit of poster child for climate change vulnerability — “a climate indicator species” — because they cannot tolerate prolonged exposure to high temperatures. Castillo Vardaro’s initial genetic analyses of pika populations in western National Parks focused on signals of isolation by distance (IBD). She explains, “the further individuals are apart geographically, the less related they are genetically. Since pikas typically establish territories close to where they were born and mate with their neighbors, I expected to see strong signals of IBD. I did in all of my study sites except Rocky Mountain National Park (ROMO).” Comparisons of the pika samples and their sequences to Genbank showed that there were two genetic lineages represented in ROMO — Northern and Southern. Then, at a pika meeting (could there be a cuter meeting?) Castillo Vardaro met Preston Somers, a researcher who studied pika dialect in the Rockies in the 1970's. She notes, “His work suggested there might be a contact zone, but we were the first to actually show it and evidence of contemporary gene flow. So, we weren't initially interested in studying ROMO as a potential contact zone, but we are now.” The analyses in this research are steeped in #poopscience, or what the paper refers to as “fecal samples…through a combination of random, targeted, and opportunistic sampling.” I asked Castillo Vardaro about the trade offs of #poopscience versus tissue samples. As a plant ecologist, my Methods have never included gems like, “We avoided collecting old fecal pellets by preferentially collecting pellets with green plant material inside to avoid degraded DNA” — but I was curious to hear more. Castillo Vardaro expounded,

Fecal DNA is essentially the mucus and cells lining the digestive tract that then coat the fecal pellet as it passes through. There are very few cells compared to tissue (organ tissue or ear clips), there are other things present that can inhibit the PCR process like plant secondary compounds, and the feces has been sitting around outside for an unknown amount of time so the DNA can degrade. Each sample has to be genotyped multiple times to overcome the errors resulting from low quality/quantity DNA. My genotyping success rate was 50% - 75%, after removing samples that failed, contaminated samples, and multiple samples collected from the same individual unknowingly. That's a lot of work in the lab.

But, the #poopscience lab work pays off if you need lots of samples across a broad geographic area:

In contrast, I just got back from a week in Montana where I was helping my coauthor Chris Ray trap pikas at a site she has been monitoring for 30 years. In four days of effort (two trap days, but it takes a day to set up traps and a day to check traps/process pikas) we trapped 5 pikas. One person can collect 10-25 quality fecal samples in a day, plus anyone can collect fecal samples for genetic analyses after about 10 minutes of training. So while I would have preferred to have worked with tissue, there is no way to sample the number of individual pikas necessary for 10 high resolution genetic analyses if you had to trap every animal.

The collaborative nature of Castillo Vardaro’s research and the Pikas in Peril reminded me of an earlier blog post I wrote about the Biological Conservation paper “The importance of non-academic coauthors in bridging the conservation genetics gap.”  I noticed that Castillo Vardaro’s PLoS coauthors were all academics, but she pointed out that her coauthor and grad mentor, Clint Epps, designed the PIP project alongside National Park Service personnel and other academic researchers. “The questions, goals, and desired products were explicit from the beginning. These included National Park Service reports, summaries, briefs (publications on the web and available at the parks themselves), spatial data, and research that could be utilized in each of the parks.”

While Castillo Vardaro was doing field work, she worked with National Park Service and US Fish and Wildlife Service biologists, interns, and volunteers. She noted, “we worked with interpretive staff to prepare the park specific resource briefs. We (myself, Clint Epps, and Doni Schwalm) also wrote a note on the potential effects of a proposed quarry site in Grand Teton National Park on the pika populations there, which was provided to resource managers there.” Basically, this work (one of Castillo Vardaro’s dissertation chapters) is the exception that proves the rule to the non-academic coauthors paper: here, the coauthor list belies the strong partnerships with non-academic scientists and managers, and if you didn’t know about Pikas in Peril, you might think wow, these academics really know how to put together explicit management implications single-handedly! 

Finally, in Castillo Vardaro’s research I saw a mirror of my own dissertation work. I had no pikas or fecal DNA, but we both finished our dissertation field work in National Parks before the 2016 election. Her work could inform whether pikas are listed as endangered or threatened under the Endangered Species Act; my research supported a climate change vulnerability assessment; and after our halcyon days as PhD students under the Obama administration, we are now watching an administration and Secretary of the Interior generally disregard the National Park Service expertise on these issues.

I told Castillo Vardaro that I feel an extra sense of urgency in publishing my Acadia papers now — especially in open access venues. I wondered if this was a personal quirk or if she felt a similar sense of responsibility for her field sites and study species. She agreed that highlighting the work that we are doing on public and federally managed lands is even more important in the current political climate. “One of the main reasons I chose to publish in PLOS ONE was because I wanted the manuscript to be accessible (open access).” She also noted that, “the PIP project was funded as part of the NPS Climate Change Response Program. I do worry about continued funding for similar projects and initiatives under Zinke and the Trump administration. Pikas tend to live in places that aren't as directly impacted by development as other ecosystems (it would be difficult to put a subdivision on the steep, rocky, side of a mountain), but the policies and proposed changes to the Endangered Species Act under the current administration to make it easier for development and resource extraction on public lands could definitely impact pikas.” 

The flipside of non-academic coauthors bridging a conservation gap is this: when the federal government is hostile towards non-extractive natural resource management, the academic coauthors in these partnerships will continue to publish our findings, piling up the evidence to support our field sites and our study species. For those of us in academia who completed National Park fieldwork in what seems like another era, getting the writing done can seem both daunting and futile. It's not. Traditionally, the first wedding anniversary is the “paper” anniversary, but for the National Park Service’s 102nd I think papers are still an appropriate — and important — gift. 

References:

Castillo Vardaro JA, Epps CW, Frable BW, Ray C (2018) Identification of a contact zone and hybridization for two subspecies of the American pika (Ochotona princeps) within a single protected area. PLoS ONE 13(7): e0199032.

On Story Telling

Last Monday night I took the mic at a Toronto bar. The whole second floor was full of conservation scientists in town for the North American Congress for Conservation Biology, the music from below thumped into our enclave, and we settled in with local beers to listen to stories of childhood tree forts, surfers tying themselves in kelp like sea otters, and daylilies dug from the lot where a great-grandmother’s garden once grew.

This was Plant Love Stories Live — a storytelling event that grew out of a blog that grew out of a tiny conversation in January between a group of postdocs in a hotel conference room who were maybe a little bit burnt out from discussing how to impact policy and what progress we’d made on a major literature review.

Plant Love Stories is a collection of personal stories about how plants have shaped our lives. As conservation researchers, we often see plants as a backdrop, a hazy, nondescript habitat for the charismatic megafauna. And yet, almost everyone has a story about a plant — the venus fly trap you didn’t realize needed water as well as flies, the delicious fruitiness of fresh-from-the-garden tomatoes, the unexpected utility of an alder tree in the middle of a fieldwork disaster. Since its launch on Valentine’s Day 2018, Plant Love Stories has published weekly stories from plant ecologists, scientists who are stridently not-botanists, artists, parents, kids, professors, and undergraduates. The beloved plants are house plants, garden plants, greenhouse plants, wild plants, trees, seeds, tattoos, and million-year-old fossils. The growing collection of love stories reminds us that we all share emotional connections to wild, growing things. Full disclosure: I am among the Plant Love Stories cofounders. I was one of the postdocs in the hotel conference room in January — basically wilting in my seat from a long week of trainings and meetings and panels — when Dr. Becky Barak animatedly exclaimed “we need plant love stories!”

Barak knows about the power of storytelling. In 2016 she delivered an amazing talk titled ‘Big Green Things Start Tiny’ as a part of the Ecological Society of America’s ‘Up-Goer Five Challenge: Using Common Language to Communicate Your Science to the Public.’ Limited to only the 1,000 most commonly used English words, Barak and the other presenters found creative language to express complicated theories, interactions, and results in memorable and entertaining talks. This session was especially memorable for me because I was taking copious notes. I was a PLOS Ecology Reporting Fellow at ESA 2016 — I had pitched writing about the Up-Goer session in my Reporting Fellowship application, and ESA 2016 was my first experience blogging for PLOS.* Ultimately, I wrote “Science Communication, Simple Words, and Story Telling at ESA 2016” a post about Up-Goer Five, language, and an ESA Special Session titled ‘Engaging with the Wider World: True Tales Told Live.’ I remember this event as a cross between The Moth and casual office hours with your favorite professor or TA. Four scientists shared stories on the theme of engagement. There were no notes or slides, I’m not even sure if they were sitting in chairs or just perched at the edge of a stage, I mostly remember it feeling very intimate.

On the PLOS Ecology blog I wrote “There was a real sense of craving in the audience as we watched these ecologists talking about science communication. We want more examples of successful science communication, and more opportunities to practice these skills ourselves.” I did not realize how personal, or prescient these words were at the time. The “craved for” examples of successful science communication are proliferating.

Storytelling is increasingly recognized as a valuable tool for communication within our scientific community — in presentations and papers — and for engaging with audiences beyond our journals and conferences. Looking inward, the 2017 paper ‘Tell me a story! A plea for more compelling conference presentations’ is an amazing resource. There’s also the 2017 PNAS opinion piece, ‘Finding the plot in science storytelling in hopes of enhancing science communication.’ My fellow PLOS Ecology Editor Dr. Jeff Atkins explored the 2016 paper ‘Narrative Style Influences Citation Frequency in Climate Change Science’ in a blog post that dives into the importance of storytelling within the scientific community. In February 2018, PLOS Biology collected ‘Conservation stories from the front lines’ to highlight “the deeply human side of research…These narratives present peer-reviewed and robust science but also include the muddy boots and bloody knees, ravaging mosquitoes, crushing disappointment, and occasional euphoria their authors experienced.” Perhaps unsurprisingly, the authors include Dr. Annaliese Hettinger, a storyteller at ESA 2016’s Engaging with the Wider World: True Tales Told Live, and Dr. Nick Haddad, an ESA 2016 Up-Goer Five presenter. 

At ESA 2018, there will be a ComSciCon workshop: “Story-Tell Your Science with ComSciCon: The Communicating Science Workshop for Graduate Students.” I attended the incredibly rewarding three-day ComSciCon in Boston in 2015. The ESA ComSciCon workshop agenda includes a write-a-thon session “where attendees can receive expert feedback on a piece of writing from a media of their choosing, from experienced academic communicators.” The write-a-thon was one of my favorite experiences at ComSciCon: I workshopped a podcast script — though I had absolutely no podcast production experience — and I basically abandoned the idea at the end of the workshop in June 2015, tucking my notes into a folder, filing it away while I went back to fieldwork and dissertation-writing. Then, last summer, my postdoc advisor suggested my name to the organizers of TEDx Piscataqua River. I had about a week to create a pitch for a TEDx talk — while I was in the middle of preparing for ESA 2017, packing to move to Maine, and submitting my final dissertation edits. But, I had that old ComSciCon folder. I dusted off the podcast script, re-wrote it as a talk pitch, and sent it to TEDx Piscataqua River. That talk — “Botanizing with my 19th century girlfriend” — is one of the coolest things I’ve ever done.** 

All the little opportunities to “story-tell your science,” all the examples we see modeled in special sessions and special paper collections, they build on each other quietly in the back of our minds until suddenly we are the one holding the mic in the front of the room. Looking back at my 2016 notes, I realize that the ESA 2016 live story telling event was organized by COMPASS and the Wilburforce Foundation and recognize a Smith Fellow alumna among the speakers. Plant Love Stories Live was hosted by the David H. Smith Fellowship, the Liber Ero Fellowship, the Wilburforce Foundation, and COMPASS. It is hard not to feel like the PLOS Ecology Reporting Fellowship has magically propelled me into this surreal present — the ESA meeting where I blogged my way through the Up-Goer Five session was also the ESA meeting where I outlined my Smith Fellowship proposal. I spent so much of that week thinking about storytelling and reporting on other ecologists' stories, I must have semi-consciously absorbed some of these lessons and ambitions to become a better storyteller myself. And so, in Toronto last week, I found myself ready to kick off a live story telling event at a scientific conference, and all those ESA 2016 memories flooded in. Somehow it was two years later, and 2,400 miles north of ESA 2016 — all the thinking and reading and writing around storytelling that ESA 2016 sparked had become a kind of personal practice. Now, I had the mic and I had the story to tell. 

References

 *A quick search through my documents folder unearthed my original pitch: “In addition to the traditional sessions, the Ignite 1 Up Goer Five session will be an amazing exploration of science communication itself: will the 1,000 most common words in the English language lead to clarity or confusion? Is this an effective strategy for reaching the general public or a fun stunt that will baffle even fellow ecologists?” 

** Aside from co-founding Plant Love Stories of course! Please submit your plant love stories!

Reading, Walking, Wishing

June in New England is a long stretch of long-lit days. When I was a PhD student, my Junes were the peak of my field season and I spent the long days logging miles up and down Cadillac, Sargent, and Pemetic mountains. For four years, my Junes were hiking ridges, recording data, wearing holes in the toes of my trailrunners. Now, I’m revising the papers that were written on the heels of those leg muscles and it’s weird to be indoors in June, sitting at a computer, without the tight hamstrings or blackfly bites.

After a long slog through a cold spring, this June I’ve returned to reading, picking up #365papers again in earnest after slacking off on the literature for a few months. Last week, I read Liam Heneghan’s essay “Have Ecologists Lost Their Senses? Walking and Reflection as Ecological Method” in Trends in Ecology & Evolution. I was indoors, at my desk, with the AC whirring, reading about walking. I felt like a fish out of water, or more aptly a field ecologist out of nature. In the essay, Henegham makes the distinction between ecologists and naturalists, comparing word counts in the anthologies The Essential Naturalist: Timeless Readings in Natural History (2011) and Foundations of Ecology: Classic Papers with Commentaries (2012).

“Although the two disciplines ‘observe’ and ‘see’ things in equal measure, natural historians nonetheless report engaging all of their senses in the pursuit of observations of nature to a greater degree. Natural historians report touching, feeling, hearing, and smelling the things of the world to an extent that scientific ecologists do not. Indeed, ecologists, if this small sample is representative, have abandoned smelling in its entirety. Moreover, natural historians ‘walk’, ‘roam’, ‘climb’, ‘sniff’, and ‘listen’ to a degree their ecological colleagues do not.”

I am a roaming, climbing, sniffing ecologist. But I bristled at the thought that ecologists as a whole should be compelled to walk to prove some kind of connection to the true core of the discipline. Heneghan does not outrightly demand that all ecologists walk, roam, and climb — his main argument seems to be the gentle conjecture “ecologists may have overlooked the fact that scrutinizing nature can benefit from an engagement of all the senses” — but he doesn’t leave much space within the discipline for non-field ecologists.

Perhaps Heneghan’s essay title is misleading and he isn’t worried about all ecologists losing their senses, just the outdoor ones. The field-based, nose-to-the-ground, perambulatory science that Heneghan and I practice is clearly not universal to ecology — and it shouldn’t be! We need modelers and theorists and lab scientists! But I fell for this essay hard. I am the target audience. When I started as a master’s student at the University of Vermont’s Field Naturalist and Ecological Planning program, my Botany 311 class, the Fall Field Practicum series of weekly full-day field trips, listed 7 goals on the syllabus. Goal #7: “Visit bakeries and enjoy spending the day outdoors.” In Heneghan’s analysis of word counts in the Ecology vs. Natural History texts, “Breakfast” receives 0.72 mentions per page in The Essential Naturalist; it does not appear at all in Foundations in Ecology*. Just digging out my Fall Field Practicum syllabus conjured up memories of cider donuts and eskers, travel mugs of maple-syrup-sweetened coffee and ombrotrophic bogs. My UVM experience was steeped in the kind of sensory details that Heneghan would appreciate and savor.

‘Walking and Reflection as Ecological Method’ reminded me of a similar paper I’d read in another (sadly non-bakery-centered) UVM class: Craig Loehle’s 1990 ‘A guide to increased creativity in research — inspiration or perspiration?’ Loehle also identifies the benefits of walking as a part of the scientific process when he encourages students to “get bored” as a work habit. This is recommended alongside running, procrastinating, and surfing — allegories for carving out time to think deeply and engage in non-productive, non-routine activities. These pursuits, Loehle promises, will facilitate creative problem solving. When I went back to re-read Loehle this week, I was surprised to find the advice “Don’t read the literature” under his list of methods for releasing creativity. I am, traditionally, a big fan of reading the literature. I’m a reader: when I was asked to review a Tansley Insight manuscript for The New Phytologist, my first move was to download and read the 2015 editorial “Introducing Tansley Insights – short and timely, focussed reviews within the plant sciences.” I won’t admit how many other Tansley Insights I downloaded after. A lot, okay? Maybe all of them. But Loehle’s “Don’t read the literature” is not a blanket statement; he clarifies that the first step as a scientist begins mulling over a new idea should not be to run to Web of Science (or whatever researchers used to find papers back in the dark ages of 1990), but to work through it a bit on your own.

“[Reading the literature] channels your thoughts too much into well-worn grooves. Second, a germ of an idea can easily seem insignificant in comparison to finished studies. Third, the sheer volume of material to read may intimidate you to abandoning any work in a new area.”

I agree with Loehle on all three points, but I’d add that the habit of reading broadly in the literature — taking recommendations from twitter**, searching outside of the Table of Contents of your subdiscipline’s favorite journal, checking out how your pet methodology is applied in another country or ecosystem, or seeking out papers with your field site as a keyword by researchers who are not in your field — is a kind of antidote to the well-worn grooves.

This month I read papers from Agricultural and Forest Meteorology, Alpine Botany, Bioscience, Conservation Biology, Current Biology, Ecology, Ecosphere, Frontiers in Ecology and the Environment, Integrative and Comparative Biology, Journal of Applied Ecology, Journal of Geophysical Research: Biogeosciences, Nature Geoscience, New Phytologist, Ocean & Coastal Management, Palynology, Proceedings of the National Academy of Sciences, and Trends in Ecology & Evolution. I am a broadly trained field ecologist — thanks UVM! — but as my career has progressed I’ve naturally found myself engaged in narrower research pursuits, and reading broadly keeps me centered, provides context for the tedium of slicing a 4.09 m core of lake sediment into half centimeter subsamples, and makes my work feel connected to society, policy, and big-picture conservation.

I’ll likely never publish in Ocean & Coastal Management, but reading “‘Back off, man, I’m a scientist!’ When marine conservation science meets policy”*** resonated with my own experiences writing public comments and meeting with congressional staffers. In a way, reading broadly is a kind of indoor-walking for restless ecologists who are prone to wandering.

Loehle and Heneghan’s essays are endlessly quotable for natural history students. But while they strive to expand how scientists engage in the world — Shake off your routine! Get outside! Smell! — they present an ironically narrow picture of role models. The patron saints of creative, roaming researchers, name-checked by both Loehle and Heneghan, are Darwin and MacAthur. I feel very strongly that if your argument around what’s needed in the “culture of ecology” can be reduced to “be more like this white man who had the privilege to travel freely and comfortably in the outdoors” you are fundamentally wrong. In Heneghan’s case, in 2018, there’s no excuse for whitewashing field ecology. Priya Shukla’s amazing piece in Bay Nature Magazine beautifully lays out the importance of representation in contemporary ecology, and the urgent need to uncover and share the ways in which wild landscapes are not empty areas that blankly awaited manifest destiny and reflect only Anglo-European stories. She writes “We need an act of revisionist natural history to color in the environmental and conservation movements. We should remind every hiker, biker, birder, citizen scientist, and field researcher that innumerable diverse people have shaped our natural spaces.” In a series of profiles of diverse voices in outdoor recreation, James Edward Mills writes in Outside, “Organizations like Outdoor Afro, Latino Outdoors, and Out There Adventures have begun stripping away the presumption of a white, male, heterosexual experience. Even more importantly, by unapologetically presenting their unique points of view, they’ve shined a light on a rich heritage of adventure and environmental stewardship that has been there for generations.”

This diversity exists in field ecology and natural history writing too, and it is not hard to find. Sure, Darwin and MacArthur were great at walking and writing about walking with wonderful sensory detail — but have you read J. Drew Lanham’s essay ‘Birding While Black’ or his book The Home Place? Robin Wall Kimmerer’s Braiding Sweetgrass? Janisse Ray’s Ecology of a Cracker Childhood****? Hope Jahren’s Lab Girl —in which the titular "girl" (Jahren) spends long stretches outside of the lab writing lyrically about working in the outdoors?

Heneghan begins his essay in a bog, but his call to arms (hiking boots?) is not simply an #OptOutside manifesto. He follows his walking naturalists — his long list of old white men: Irish botanist Robert Lloyd Praeger, Henry David Thoreau, Charles Darwin, Robert McArthur, and E. O. Wilson — indoors to their writing desks. At the end of the piece, Heneghan is in the archives, reading Praeger’s papers and reflecting on his prodigious writing. “A day’s walk can furnish long hours back at the desk.” Heneghan muses, “Thus for every insight into nature, there is a hidden process by which that insight was achieved; every active life contains a hidden core of repose.”

So this is my indoor June, my hidden core of repose. My trailrunners lie neglected, but the writing & reading continues, as I adventure through the memories and field notes and spreadsheets on the heels of the illustrious white men, and the many, many equally bold, sure-footed, and thoughtful unnamed white women and people of color who have trod this path before me.

References:

Heneghan, L., 2018. Have Ecologists Lost Their Senses? Walking and Reflection as Ecological Method. Trends in Ecology & Evolution 1–4. doi:10.1016/j.tree.2018.04.016 

Loehle, Craig. 1990. "A guide to increased creativity in research: inspiration or perspiration?." Bioscience 40.2: 123-129.  

*I have a confession to make here. I read most of Foundations in Ecology while I was a PhD student. I had not even heard of The Essential Naturalist until I read this paper. So maybe I’m not such a great naturalist after all? ...Or maybe I’m an amazing naturalist, always outside tromping around, and I don’t have time to read natural history anthologies because I’m too busy smelling nature?

**I found Heneghan’s essay by way of @ChelskiLittle’s prolific #365papers tweets. Thanks Chelsea!

***I found this paper by way of @Drew_Lab’s #365papers tweets. Thanks Josh!

****I cannot say enough about Milkweed Editions. This independent, nonprofit literary powerhouse in Minneapolis publishes incredible environmental writing. My husband gifted me a Milkweed book subscription years ago and it's my absolute favorite piece of mail every month. Maybe 30% of my love for LacCore & the science they do there is a side effect of the fact that every time I visit LacCore, I get to take a side trip to Milkweed. 

Hidden in Plain Sight: the Secret Tree Diversity of Cultural National Parks in the East

Last summer, my daughter received All Aboard! National Parksa whimsical board book that devotes full-page spreads of colorful, kid-friendly illustrations to nine National Parks along a fictional railroad route. The National Parks skew western — Olympic, Yosemite, Yellowstone, Grand Canyon — with Acadia and Great Smoky Mountains representing the entire eastern half of the U.S. But, the book is a skewed representation of the National Park System in another way too: it only showcases the large, iconic, and “wild” national parks. Where are the National Battlefields, the National Recreation Areas, the National Scenic Rivers, and the National Historic Sites?

A recent paper from Forest Ecology and Management has me thinking that the cultural parks of the east that fall under the National Park Service umbrella deserve their own board book!

In the eastern United States, our National Parks dot the landscape as constellations of historic battlefields, homes of important historical figures, and wild islands of nature scattered across an eastern seaboard of cities, development, and fragmentation. But, it turns out that these small, cultural protected areas are harboring incredible tree species diversity. Dr. Kathryn Miller and colleagues from the National Park Service and University of Maine published “Eastern National Parks protect greater tree species diversity than unprotected matrix forests” after comparing tree species diversity measured in National Park Service Inventory & Monitoring plots to the species diversity recorded in nearby US Forest Service Forest Inventory and Analysis plots. Miller considered five metrics of diversity in each plot — number of individuals, tree species richness (how many species were in each plot?), Shannon evenness (are the species in the plot relatively as abundant as each other or are some super common and others very rare?), McNaughton Dominance (what is the relative abundance of the two most abundant species?), and Percent Rare N/S (what percent of species in a plot have fewer individuals than the average species abundance in that plot?).

The title of Miller's paper is a spoiler alert — the parks were more diverse than the matrix (non-park) forests — with park forests comprising higher species richness and a more even, less dominated distribution of abundance across species. She found this pattern of higher species diversity across the majority of the parks in the study, but it was most consistent in the lower latitude parks. Over a decade of publicly available data from the National Park Service’s Inventory & Monitoring plots and the Forest Service Forest Inventory and Analysis plots allowed Miller and her team to explore tree species diversity across 39 eastern National Parks, each containing between 4 (Sagamore Hill National Historic Site) and 171 (Acadia National Park) forest plots. Before Dr. Miller began her PhD at UMaine, she led field crews that collected some of the data in the National Park Service Inventory and Monitoring Program. Miller told me, “My field experience sampling and hiking around eastern forests has definitely helped me frame the types of research questions to ask, and interpret whether the results are meaningful. When I started this study, I suspected that at least some of our parks, particularly the larger ones (e.g. Delaware Water Gap National Recreation Area, New River Gorge National River), would have greater tree diversity. I was surprised, however, to find out that many of our cultural parks, which tend to be smaller and haven't been protected as long, also have greater stand-level tree diversity than matrix forests.”

Miller’s results are both expected and unexpected. First, there’s a general understanding among ecologists that eastern US forests today are smaller, younger, and more homogenous than they were before centuries of European settlement, land clearing, and timber harvesting. And, we know on a basic level that forests in US National Parks are largely protected from development and harvesting. So, it shouldn’t be shocking to find that forests managed by an agency that is dedicated to promoting ecological integrity and natural disturbance regimes are full of lots of species — not just the early successional ones. But, on the other hand, we often don’t imagine Minute Man Historical National Park — a battlefield replete with actors in Revolutionary War costumes — as bastion of biodiversity. Or, in the case of All Aboard! National Parks, we don’t imagine these cultural parks as national parks at all. So how did Miller land on this question — what made her interested in comparing the tree species diversity in parks and unprotected forests in the east? She muses that “this research question in particular was a follow-up to [our 2016 Ecosphere paper] "National parks in the eastern United States harbor important older forest structure compared with matrix forests" which compared metrics of forest structure in eastern national parks with surrounding matrix forests.” In that study, she found that “parks, regardless of park designation (e.g. National Park, National Recreation Area, or National Historical Park), had consistently older forest structure than matrix forests.” Were these older forests also more diverse? The same forest plot databases could answer that question as well! 

I asked Miller if her research changed her view of the ecological value of cultural national parks. “For me, the results of this study were very encouraging, and confirmed that our efforts to monitor and keep even the smallest parks' forests healthy are worthwhile. I am hopeful that the results of these studies are empowering to the resource managers in our cultural parks, and lead to stronger emphasis and additional resources for maintaining healthy forests in these parks. Ultimately our research also makes a strong case for the importance of protected areas in preserving forest biodiversity, even small urban parks.”

This research seems relevant to managers outside of National Parks as well — and Miller hopes that private landowners, state parks, and NGOs take note. She recognizes that resilience to global change is a big contemporary concern for many land managers. “In forests, tree diversity and structural complexity are important components of resilience, and our results demonstrate the positive influence that protection, particularly protection from logging, can have on forest resilience. In addition, park managers often receive pressure from well-meaning members of the public, and even other park staff to "clean up" forests after natural disturbances. In fact, this was typical management practice in the early days of national parks before we knew better.” She tied together her species diversity and forest structure research and reflected that, “coarse woody debris, dead and dying trees, and blow-downs all contribute to the overall diversity of a forest, and our research has shown that protected forests have more of these features than unprotected forests. Hopefully our research can help inform and support managers' decisions not to clean up after disturbances unless there is a concern about human safety (e.g. hazard trees).” Miller and I both work in Acadia — the kind of classic wild National Park that appears in our imaginations and children’s books as an iconic protected landscape. But as Miller points out, “Interestingly, Acadia National Park did not come out as being more diverse than surrounding matrix forests, particularly because the park has more extensive late successional forests that are largely dominated by red spruce.” She explains, “this isn't necessarily a bad thing, but it does suggest that the forests in Acadia may be more vulnerable to stressors than matrix forests, particularly stressors that could impact red spruce. While this isn't the greatest news, this is important information for park managers to know.”

Like many folks in the greater Boston area, I drive hours to Acadia and feel like I am stepping into a wilder, more biodiverse ecosystem when I lace up my hiking boots at the trailhead to Cadillac Mountain. But, there are pockets of protected tree species diversity hidden in plain sight across the eastern US. Miller’s research makes me rethink my summer road tripping plans — perhaps I should seek out some of those old, diverse forests in National Recreation Areas and Historical Parks, maybe some are actually accessible by railroad... I'm going all in on my research for the All Aboard! Cultural National Parks of the East board book pitch! 

References:Miller, K.M., McGill, B.J., Mitchell, B.R., Comiskey, J., Dieffenbach, F.W., Matthews, E.R., Perles, S.J., Schmit, J.P. and Weed, A.S., 2018. Eastern national parks protect greater tree species diversity than unprotected matrix forests. Forest Ecology and Management, 414, pp.74-84.

Miller, K.M., Dieffenbach, F.W., Campbell, J.P., Cass, W.B., Comiskey, J.A., Matthews, E.R., McGill, B.J., Mitchell, B.R., Perles, S.J., Sanders, S. and Schmit, J.P., 2016. National parks in the eastern United States harbor important older forest structure compared with matrix forests. Ecosphere, 7(7).  

Book Review: The Feather Thief

I’ve got my conference roadtrip routine dialed in. This spring I drove to the Northeast Natural History Conference (215 miles each way), the Northeast Alpine Stewardship Gathering (150 miles), the University of Maine Climate Change Institute’s Borns Symposium (250 miles), and (as a fan, not an ecologist) the New England Division 1 College Men’s Ultimate Frisbee Regional Tournament (100 miles). I packed insulated mugs for both hot and iced coffee, a trusty ice scraper for the always-lovely April ice storm in northern Vermont, a light-weight wrap to chase the air conditioning chill on my bare arms after ducking inside on the actually-lovely first 70° days of spring in Maine, and a garment bag of professional clothes to replace my ripped maternity jeans/driving uniform upon rolling into the conference center. I hit the best bakeries (King Arthur’s, Beach Pea, Florence Pie Bar). And on the last few legs, I listened to an amazing, engrossing audiobook: Kirk Wallace Johnson’s The Feather Thief: Beauty, Obsession, and the Natural History Heist of the Century. 

My favorite moment in The Feather Thief is not the poignant description of Alfred Russel Wallace watching four years worth of his South American collections burn at sea from the lifeboat of the Helen, or the almost heroic depiction of the generations of curators of natural history collections shepherding scientific information through the ages. It is the suitcase scene. Author Kirk Wallace Johnson and his wife are packing a suitcase: a laundry-laden re-enactment of Edwin Rist’s 2009 theft of hundreds of bird skins from England’s Natural History Museum at Tring: 

“Do you think two hundred ninety-nine birds would’ve fit in just one?”…Seeing where her questions led—that multiple suitcases would suggest multiple people—I got out a medium-size suitcase. Having seen the window at the Tring, I knew he couldn't have fit one much larger through it. Working together, we spent the next hour building a pile of fake birds. A rolled-up pair of dress socks formed a Blue Chatter. She folded several dozen T-shirts and dish towels in the approximate size of an Indian Crow, and used her leggings to fashion Respendent Quetzal tails.We started packing. Marie-Josée, consulting the Tring’s spreadsheet, counted off each species. When the suitcase was halfway full, we were already at eighty birds. Of course, our experiment was hardly scientific—my washcloth Flame Bowerbirds might have been a bit large—but it seemed as though it would’ve been difficult to fit all of them in a single suitcase.

 By this point in the book, the reader (in my case, the listener) has followed rapt while Johnson evolved from a memoirist trying to escape writer’s block through fly-fishing to an amateur detective with an accordion file of notes on the history of biogeography and conservation biology. In the prologue, when he first hears of Edwin Rist’s theft, Johnson is running a foundation committed to helping Iraqi refugees who have worked for U.S.-affiliated organizations to obtain visas to the U.S. (This American Life listeners may remember Johnson’s story from Nancy Updike’s interview in episode 607). He knows almost nothing about fly-tying, museum bird collections, Alfred Russel Wallace, or how these topics could possible overlap. The Feather Thief weaves these niche interests and the unbelievable robbery of 299 bird skins from the Tring into a compelling, larger-than-life narrative that traces Wallace’s birds of paradise from Southeast Asia to Victorian trends in hat fashion to the International Fly Tying Symposium in Somerset, New Jersey. 

When Johnson begins packing his suitcase with laundry-birds, we are deep into the story — the thief has been caught, the case is closed, the Tring curators are sifting through the remains of bird skins separated from their tags, including Ziploc bags of feathers plucked for individual sale and returned to the museum by a paltry few of the fly-tiers who discovered their eBay purchases were stolen goods. In the suitcase scene are the echoes of all the travels of both the bird and human characters of the book — Wallace’s voyages, the ships laden with feathers for fancy hats, the bird skins and other natural history collections spirited to the English countryside and away from bombed out London during World War II, the American flautist studying at the Royal Academy of Music, the stolen bird skins mailed to eBay customers across the globe, Johnson’s own travels from Iraq to New Mexico’s Red River, to New Jersey, South Africa, Germany, and Norway tracking down fly-tiers associated with Rist. 

Many of the legs of Johnson’s trip will be familiar to ecologists. As a community, we know the namesake of the Wallace Line, we’re familiar with the story of how Wallace’s correspondence coerced the plodding Darwin to finally, publicly share his theory of natural selection, we know that some of the earliest major conservation policy was driven by women who were appalled by the hidden cost of other women's decorative hat choices, and we can expound on the value of natural history collections. Though, The Feather Thief might make us think twice before again exclaiming broadly, “Given [natural history collections] breadth of importance and relevance, it would be difficult to imagine anyone dismissing the value of natural history collections to society relative to the research, education, and training of next generation scientists” (Bradley et al 2014).

Throughout the book, the value of natural history collections to society is routinely dismissed — the tags associated with Wallace’s bird skins are tossed aside and the record-keeping at the Tring is questioned by fly-tiers who suggest the museum should sell their extra skins to fly-tiers instead of keeping them in musty drawers. Reflecting on the scientific loss related to his crime, Rist cavalierly (and wrongly) says, “after a certain period of time—I think about a hundred years—technically speaking, all of the scientific data that can be extracted from them has been extracted from them. You can no longer use DNA, because what you would want to do it for is to prolong and help living birds, which hasn’t really worked anyway, because they’re still going extinct, or will go extinct depending on what happens with the rainforests.” This scene reminded me of another science-heist book, Sex on the Moon, in which a NASA intern steals a lab safe full of moon rocks for kicks. The scientist whose samples were taken tells the FBI that the safe also contained his notebooks documenting thirty years of research. The thief “didn’t remember seeing any green notebooks in the safe. As far as he knew, they hadn’t thrown any thing out, other than the safe itself, so if there were notebooks, they’d still be either in Sandra’s storage shed or in the suitcase that had been with them in the Sheraton. But [the thief] didn’t really want to talk about some phantom notebooks.” In both cases, the scientific value of the stolen goods barely registers with the young, white males who believe they are entitled to these rare items.

In The Feather Thief this tension between the curators who mourn the loss of the skins and tags, and the general public’s perception of the heist — a hilarious tale of an American kid robbing a British museum for feathers so he can tie flys that no one will ever actually fish with! — reflects our biases; we, as scientists, do not clearly understand the difference between how we value natural history collections within our community and how these same collections are valued by those outside of science. 

Finally, I want to note one failing in the book. As a former natural history museum intern (shout out to Worcester’s EcoTarium) and herbarium researcher, I bumped on the clumsy way that Johnson described the record keeping associated with museum specimens. He never explained the accessioning process — how museums enter items, like skins or specimens, into their collections. I think that this oversight diminishes Johnson’s eureka moment when he, late in the book, receives the Tring’s spreadsheet of stolen birds: “it meticulously noted the exact number of skins gathered from Edwin’s apartment the morning of the arrest (174), the number of those with tags (102) and without (72), and the number of skins subsequently returned by mail (19).” Later, this same spreadsheet returns but when Johnson reads the column headings aloud, the first one is “Number of Specimens Missing in July 2009.” This column sounds like it was sourced from a museum database, while the first description reflects numbers collected by the police from a crime scene. Johnson documents the fly-tying community’s dismissal of the Tring’s records — "'Ask Tring the last time they counted all their birds!'"— but drops the ball on presenting clear, compelling evidence to support the museum's count of 299 lost skins. It’s never explicitly explained how the 299 tally is calculated, which is a shame because I imagine that opening the empty drawers in the Tring, matching the tags of the left-behind birds — juvenile males and females without the prized technicolor feathers — to the accession numbers and digital photographs of museum records, creating a Missing List for each species and drawer, all of this would be high drama while also offering a window into the work of natural history collections. What specific research had these skins, the missing and the left-behind, contributed to in the past? Which birds had donated DNA or geographic information to scientists before the heist? I imagined these notes, papers, and reports exist but Johnson doesn’t cover them, except to offer general examples of the kinds of research that rely on collections. And here’s the thing: The List Project literally started as a spreadsheet. Johnson knows spreadsheets. Why is this one, which figures so prominently in Johnson’s moment as a main character, which drives his detective work as he dives deeper into the case, so poorly-described? Just another unsolved mystery of The Feather Thief… 

References:

Johnson, Kirk Wallace. The Feather Thief: Beauty, Obsession, and the Natural History Heist of the Century. Viking, 2018.

Robert D. Bradley, Lisa C. Bradley, Heath J. Garner, Robert J. Baker; Assessing the Value of Natural History Collections and Addressing Issues Regarding Long-Term Growth and Care, BioScience, Volume 64, Issue 12, 1 December 2014, Pages 1150–1158, https://doi.org/10.1093/biosci/biu166

National Parks are for the Birds

Happy National Parks week!While I tend to plan trips around plants — Thuja plicata in Olympic National Park, Lathyrus japonicas at Cape Cod National Seashore — I understand the draw of non-botanical Park residents: the iconic bison in Yellowstone, the wolves and moose of Isle Royale, the bald eagles cruising the coast of Acadia. 

Birds are among the most beloved park wildlife, and people — regular visitors, rangers and researchers alike — have been studying birds in National Parks for decades. Bird watchers are among the most consistent and prolific citizen scientists and their observations from National Parks to backyards comprise some of the largest and oldest community-based science research in the country. The most famous datasets of this kind are the Christmas Bird Count and the Breeding Bird Survey. These two datasets — covering a huge spatial area, a long species list, and over three decades of observations — allowed the National Park Service and the National Audubon Society to project bird responses to climate change across the National Park System.

Imagine you are standing in a National Park (I always imagine I am standing in Acadia). Take a moment to identify the avifauna — aka the birds — in this park. Now, zoom into the future, sometimes between 2041 and 2070. What birds are in your National Park now? Has your species list changed? Grown? Shrunk? Park managers, researchers, and bird watchers would all love to know the results from this time traveling exercise. Now, thanks to Dr. Joanna Wu and colleagues, we have these projections available! In a recent PLoS ONE paper, Wu and coauthors use the Christmas Bird Count and Breeding Bird Survey to model climate suitability for over 500 bird species. Then, they zoom into the future and look around at the projected climatic changes in 274 National Park. From this perspective in the future, they write a new species list for each park: which birds are disappearing, and which new colonizers are expected to move in. They find that most parks are likely to become more bird-y — potential colonizations will exceed extirpations, especially in the winter. 

The models of summer and winter distributions were trained on two big, old citizen science projects — the Breeding Bird Survey and the Christmas Bird Count. I asked Wu if it was coincidence that this research was grounded in community-based science, since both Audubon and the National Park Service depend on the general public for support. She writes, “these data sets were the only ones done with survey rigor at a large enough of a spatial scale to allow us to map out bird occupancy across the entire North America. It was certainly meaningful for Audubon as the compilers of the Christmas Bird Count data to rely on our community science products in a scientific study.” This shared enthusiasm between Audubon and the community of birders is reflected in the beautiful website that presents Wu's findings to the public: you can watch species turnover, click on specific parks, and look at national trends.And it’s not just that birds are charismatic fauna with huge fan bases that are obsessed with making lists (I’m looking at you, birdwatchers). Wu notes, “birds are important ecological indicators because they travel much larger distances on an annual basis (as a whole) than plants or mammals, and may thus be able to track climate better than other taxa.” So, when Wu and her colleagues project changes in bird communities at the National Parks, they are looking at the frontline of ecological changes under anthropogenic climate change.

“Though plants and mammals are shifting too, birds are indicators as they’re likely to respond first and more drastically. Of course this leads to a potential mismatch in resource availability as plants, insects, etc. respond at a different rate to climate change, leading to unforeseeable consequences.” 

Finally, I asked Wu what we can do if we live and/or work outside of a National Park. Unfortunately, Acadia is not actually home, and I wanted to know how my actual backyard fit into the bigger picture here. “Our research does show that birds are going to be on the move and the corridors between parks are important to support this change. State parks, wildlife sanctuaries, and even back yards are going to be increasingly important places for birds moving to new areas in light of climate change. One of the things we can do is planting native plants to provide resources for birds as they face unprecedented change to the climates and habitats they evolved in in the coming decades.” 

Enjoy National Park Week! Happy birding! 

Reference:

Wu JX, Wilsey CB, Taylor L, Schuurman GW (2018) Projected avifaunal responses to climate change across the U.S. National Park System. PLoS ONE 13(3): e0190557. https://doi. org/10.1371/journal.pone.0190557

An Epic Joshua Tree Roadtrip & the Reproductive Ecology of an Iconic Southwest Plant

Think of your most amazing four-state roadtrip. How much data did you collect between stops at Disney Land and the hotel pool? Did you stargaze in the Mojave Desert or were you too exhausted after a day of running transects through Joshua Tree National Park? Did you look at the famous Joshua trees with wonder and awe, or did you keep your head down and count individual flowers on these episodic bloomers then hastily move on to the next site to keep tallying reproductive metrics? Did you come home to your computer and upload slideshows of vacation snapshots or did you immediately begin writing up notes like:

Despite its prominence in plant communities of the Mojave Desert, surprisingly little has been published on its reproductive and structural ecology. The majority of research on Joshua tree has focused on its highly coevolved pollination relationship with the Yucca moth. Outside its pollination biology only a few studies have been published on its reproductive ecology.

Thanks to one amazing roadtrip — with a little help from Disney World and Denny’s — new research is shedding some light on patterns of flowering, fruit production, and stand structure of Joshua trees across the Mojave Desert. I did not realize how “hashtag blessed” my own phenology research was until I read Samuel St. Clair and Joshua Hoines’ new PLoS ONE paper on the reproductive ecology of Joshua trees.

My research is a steady annual routine: I study flowering in plant populations that consistently bloom every spring when I arrive in Maine to record them. St. Clair does not have this luxury with Joshua trees — he writes: “episodic blooms make it hard to anticipate a study of its reproduction.” Early in 2013, St. Clair saw Joshua trees blooming at his field sites and called around — the trees seemed to be blooming across their range, he “even heard reports of blooming in Las Vegas and Phoenix yards.” As it became clear that 2013 was a rare opportunity to study reproductive ecology for an unpredictable study organism, St. Clair jumped to take advantage.

“Obviously there was little time to spare. I mapped out a range wide survey of populations, put a travel map together and booked hotels. Took my two sons out of school (ages 10 and 9) for field help in early May and promised them a stop at the Adventure Dome in Las Vegas and a day at Disneyland. We jumped in our car and were off.” St. Clair, a professor at BYU, and Hoines, at the National Park Service, split the fieldwork and covered ten study sites across four states in May and June 2013.

At each site they collected data on the population characteristics (population density, tree height, trunk diameter) and reproduction (number of inflorescences and total fruits, percent of trees in bloom, fruit mass, seed number) of 120 Joshua trees. That’s 1200 trees — from 60 100-meter transects! — in under two months. St. Clair shared some memorable moments, “A grasshopper outbreak at Lytle Rach that had the boys in tears, Kids eat free at Denny’s at least 4 or 5 nights and Disney Land was awesome. The boys still talk about the trip fondly.” The opportunistic rush for reproductive data revealed interesting patterns across the climate gradient of the Joshua tree’s range. At warmer sites, the Joshua trees produced more flowers and seeds, but stand density was lower, while at cooler sites, there were more Joshua trees but fewer flowers and fruit per tree. So while warming temperatures may be good news for reproductive success, the establishment of new Joshua trees seems constrained by warmer temperatures. I asked St. Clair what these results meant for Joshua trees facing climate change. “I think the bigger limitations moving forward will probably be in the seedling establishment and recruitment phases of development.  The fruiting success suggests that the pollinator populations are intact which is good—we’ve see pollination failure due to a lack of yucca moth in populations of Banana Yucca in a recent paper we published.” 

The future of Joshua trees in Joshua Tree National Park is not just a concern for scientists. The official twitter account of the Park (@JoshuaTreeNPS) garned five minutes of fame last November when they began tweeting about the potential effects of climate change on the park’s biodiversity. Secretary of the Interior Zinke apparently reprimanded the Joshua Tree National Park superintendant for these social media science lessons.The idea that a national park should be dissuaded from sharing research on the natural and cultural resources — including, the namesake of that park — with visitors and general public is truly absurd.

I think this means that it is our responsibility to tweet out the results and implications of St Clair and Hoines’ new paper and continue the conversation that @JoshuaTreeNPS started. 

Reference:

St. Clair SB, Hoines J (2018) Reproductive ecology and stand structure of Joshua tree forests across climate gradients of the Mojave Desert. PLoS ONE 13(2): e0193248. https://doi.org/10.1371/journal.pone.0193248

Not Seeing the Grass for the Trees

I appreciate repetition.

My favorite class in high school was AP Chemistry, but I think I owe most of my AP success to the previous year's slog through regular Chemistry. By the time I took AP Chem, all the basics were finally settled in my mind and I could hit the higher-level concepts that I’d only whiffed at the year before.

The second time I ran a marathon I had so much more fun — and so much more left in the tank for that last, terrible 10K.

The second time I read a paper from a new-to-me sub-discipline, or with specific, sophisticated statistical methods, I get a similar boost of adrenaline and understanding. These déjà vu methods* are often serendipitous — it’s hard to consciously search for them — but they are so rewarding when I stumble into them. Déjà vu methods struck PLoS ONE this winter in the form of land cover change captured in Landsat images. The Landsat program has been capturing satellite images of Earth since the 1970s, and researchers can compare decades of Landsat images to tell a time-lapse story of changing land cover at a high resolution. Two great papers used this method to explore trends in forest cover on opposite sides of the globe: New England in the United States and the Western Ghats in India. 

As I read Thompson et al.’s ‘Forest loss in New England: A projection of recent trends’ I could imagine the last twenty years of land cover change in my mind’s eye before even glancing at the figures. I’ve lived in New England nearly my entire life; I went to grad school in one of the three case study sub-regions, and worked college summers in another. The third case study sub-region is a long stretch of coastal Maine that I drove through every field season on my way to Acadia National Park. I’ve collaborated on remote sensing work, but it’s not my wheelhouse, so reading Thompson’s paper allowed me to enter this world in a really intuitive way because the results and projections already felt familiar to me. 

And then I read ‘Not seeing the grass for the trees: Timber plantations and agriculture shrink tropical montane grassland by two-thirds over four decades in the Palani Hills, a Western Ghats Sky Island.’ Here, Dr. Arasumani and a team of academic and non-academic researchers used four decades of Landsat images to quantify patterns of land cover change in grasslands, forests, plantations and agriculture in a region of southern India called the Palani Hills. This is a landscape that I could not imagine — fortunately Arasumani’s team collaborated with photographer Prasenjeet Yadav who created an amazing 4-minute film. This video is a fantastic introduction to the ecosystem with beautiful footage of the shola grasslands and shola forests. ‘Not seeing the grass for the trees’ is a response to the local perception that timber plantations have replaced shola forests in the sky island of the Palani Hills. Local conservation policies center on restoring shola forest trees, with little focus on the shola grasslands. So, a group of scientists began using Landsat to challenge the current conservation view. As Dr. Milind Bunyan and Dr. Robin Vijayan write, 

“The popular discourse that timber plantations are invading shola forests runs deep and wide, but there are exceptions to this observation. In the state of Kerala for instance, there is growing appreciation that it is the grasslands that have been lost to plantations and not the forests. The state that holds a majority of this ecosystem both in original and modified states (viz. Tamil Nadu) however, largely believes that plantations have invaded forests (although there are individuals in the state forest department who now recognize the loss of grasslands).”

Coauthor Robert Stewart and his late wife Tanya Balcar had been working in the Palani Hills since the 1980s: their Vattakanal Conservation Trust focused on forest and grassland conservation and they were among the first to notice that the grasslands were disappearing. The story of how Tanya Balcar’s observations snowballed into this paper is a lovely peek behind the curtain of conservation research: the collaborations, the shoestring budget, the surprises, and the great food all ring true to my experiences working with NGOs and government agencies in New England. Bunyan and Vijayan gave me a long version to edit down, but I love the details too much.

“[Tanya and Robert] convinced some of us who were working on different projects in this landscape including Ian Lockwood, a two-generation resident of Palani Hills, and a friend of Tanya & Bob. Using his skills as a geographer, Ian conducted a preliminary GIS analysis, which revealed the dramatic changes that had occurred during his lifetime; he then published these results on his blog. This caught our attention when we realized that much of the change in the landscape had occurred very recently, and providentially within the period of LANDSAT imageries.Anil and Sunayana Choudhary from INTACH Kodaikanal (listed in the acknowledgements) were the people who really made the project happen. They generated INTACH funding for the project to conduct fieldwork, and to hire a technician to do the GIS and ground-truthing. As with most research projects however, we did not stick to the script and ended up hiring two technicians (one for the lab and the other for the field), despite uncertainties at the time on how we would support both of them. Of these, Danish Khan came with a tremendous wanderlust and was therefore, the natural choice for our field component, and Arasumani M., who graduated at top of his class, was the lab person conducting the GIS analyses.The only thread that binds all of us is a desire to work in the landscape, albeit on varied aspects, and understand and document the threats and changes in this landscape, which required a baseline that we could use for future studies. This was an extremely frugal study, and most of us contributed significant amounts of time (and in some instances, money) to the project in different ways. With different roles on the project, we found working together relatively easy and complementary. A lot of our work also involved working different physical locations (including putting these responses to your questions together), and used cloud-platforms like Google Docs. We’re also proud to say that our meetings were almost like large family gatherings, full of great food (supplied generously by the Choudharies), and travelling through the landscape.”

Through Landsat images and ground-truthing, this team found that shola grasslands — the dominant cover type forty years ago — had been invaded by agriculture and plantations. Agriculture and plantations overran shola grasslands with different spatial patterns of replacement and degradation: agriculture takes over in “large, compact, and spatially aggregated patches” while plantations puncture the landscape with small, irregular-shaped patches as invasive plantation species spread into the ecosystem. This analysis also found that only half of the existing grasslands are currently included in the Kodaikanal Wildlife Sanctuary; they identified eight additional grasslands along cliff edges or bordering abandoned agricultural areas to include in this sanctuary.

Finally, the authors conclude with four specific conservation recommendations: (1) identify and conserve core grasslands (2) check invasion in sparsely invaded grasslands (3) review indiscriminate removal of mature plantations (4) contain agriculture. I asked Bunyan and Vijayan how these recommendations have been received by the Kodaikanal Wildlife Sanctuary and the local communities. They write “In addition to our town hall meetings, we have had several interactions with forest department staff of the KWS to disseminate our conservation recommendations. We opine that the Forest Department is positive, and we hope to work with them to be able to achieve the goals stated in the paper. The publicity that this article has generated, which has been covered in the national media and now internationally, will go a long way in promoting these recommendations.” 

I wish good luck to them as they continue this important work! And thank you for enriching my winter with beautiful images of the shola grassland!

References:

Arasumani M, Khan D, Das A, Lockwood I, Stewart R, Kiran RA, et al. (2018) Not seeing the grass for the trees: Timber plantations and agriculture shrink tropical montane grassland by two-thirds over four decades in the Palani Hills, a Western Ghats Sky Island. PLoS ONE 13(1): e0190003. https://doi.org/10.1371/journal. pone.0190003 

Thompson JR, Plisinski JS, Olofsson P, Holden CE, Duveneck MJ (2017) Forest loss in New England: A projection of recent trends. PLoS ONE 12(12): e0189636. https://doi.org/10.1371/ journal.pone.0189636    

* To expand on déjà vu methods, I present the thylacine. Last November I read a preprint of a paper on thylacine extinction; I don’t actually know anything about thylacines, but my friend Kevin Burgio was a coauthor, I had studied abroad in Australia when I was in college, and I thought it sounded cool. This thylacine paper introduced me to Bayesian Extinction Estimators and less than a month later, my PhD advisor published ‘A statistical estimator for determining the limits of contemporary and historic phenology’ — a paper that repurposed Bayesian extinction estimators for historical and herbaria-based phenology data. Reading the thylacine paper serendipitously primed me to fully understand this methodological approach for my own field (plant phenology). I'm not the brightest crayon in the box, but if I just keep reading déjà vu methods, I'll make it to razzmatazz.

Conservations Genetics, Non-academic Coauthors & Erdős Numbers

I spent a week in Washington DC about two weeks before the government shutdown. Part of my conservation science postdoc fellowship involves professional development retreats and this winter we were in DC for policy training. Over three days, panels of government scientists, NGO staff, and legislative staffers repeated this message: publishing peer-reviewed papers is not enough to impact policy. I remember sitting at the bar one evening and lamenting the standard “these results suggest conservation managers should…” sentence near the end of each of my dissertation chapters.

As early-career scientists, we all felt a little stuck — what could we do to make our research more policy-relevant and accessible? Well, for one, we could write papers with non-academic coauthors. 

A recent study in Biological Conservation reports that papers with non-academic coauthors better link conservation genetics and genomics research to policy and conservation outcomes. Britt et al. assert that conservation genetics faces an application crisis: while many peer-reviewed publications tout the importance of conservation genetics, there has been limited integration of genetic data into management. Dr. Aaron Shafer at Trent University speculated that this “conservation genetics gap” was not a case of managers lacking access to expertise and funding, but driven instead by academics under pressure to publish who were framing genetic studies in conservation buzzwords. He thought the swell of conservation genetics in the literature might not match the needs of managers on the ground — thus, managers reading the peer-reviewed lit would be unlikely to find relevant conservation genetics research, and instead focus limited resources on old school methods like radio-collaring. Shafer shared this hunch with an undergrad and she hit the ground running — lead author Meghan Britt led a meta-analysis of conservation genetic and genomic studies to uncover the causes behind the conservation research-implementation gap. 

Britt and Shafer’s paper, ‘The importance of non-academic coauthors in bridging the conservation genetics gap,’ found three thought-provoking trends after reviewing 300 publications. First, the majority of these papers were focused on “species of low conservation concern or species yet to be assessed.” So, conservation genetics was often centered on species that were not top priorities according the IUCN RedList or NatureServe. Second, less than 40% of the papers contained specific conservation recommendations. They write, “an article was ranked as having a specific conservation recommendation if there was a clear course of action suggested, stated implementation methods, or policy changes that were advocated for.” The generic “we propose maintaining genetic diversity of the species to ensure long-term viability” did not count: there’s no clear or readily transferable application. Finally, a non-academic coauthor was associated with a 2.5-fold increase in the odds of a publication making a specific recommendation. Basically, non-academic coauthors seem to bring a heightened understanding of policy and on-the-ground needs to conservation genetics projects, and the result is a more management-forward paper. 

I’m not a geneticist, so I asked Shafer, isn’t this just good practice for conservation research in general? Shouldn’t we all seek out non-academic collaborations if we want our research to have real-world applications? His answer: Yes!

“We try to get out of the bubble, but it’s hard. We need to make that effort. We don't know the regulations and laws. There are people that understand these organisms on the ground, stakeholders who live with these animals. We think that we are always the knowledge providers, but really it is a two-way street.”

 Shafer has a long history of working with Alaska Fish and Game, dedicating many years to building good relationships with researchers and managers. I asked if these collaborations might also alleviate another side of the conservation genetics-implementation gap by increasing managers’ access to expertise and funding. He sees a lot of benefits for management in these partnerships: “Arguably we have more freedom on the academic side to try different protocols, whereas it's more rigid for management, and our flexibility can help bridge this. But, to have real world impact it needs to be guided by the managers.” He noted that academics often wear blinders to the on-the-ground needs of managers or the policy implications of their work. “In academia we can have samples in the freezer and yet we’ve never seen that animal in the wild.” We often think of the “gap” in conservation implementation as a fault of managers and policy-makers not listening to the science, but it is unrealistic and out of touch to see the gap is as a part of a linear model of conservation scientists delivering the empirical solutions.* 

Finally this paper made me think about Erdős numbers. In academia, a person’s Erdős number is a Kevin-Bacon-like metric of the “collaborative distance” between themselves and prolific mathematician Paul Erdős. Instead of counting the number of co-stars between yourself and Kevin Bacon, you count the number of coauthors between yourself and Paul Erdős. Stephen Heard recently blogged a bit about his absurdly low Erdős number. Since Heard is an ecologist, and Erdős was a mathematician, this low number shows the cross-disciplinary reach of their work. But, Britt’s paper led me to wonder if conservation scientists need a new Erdős number. What if we scored our collaborations outside of academia, or thought of a clever name for collecting coauthors from different agencies, from different levels of government, or from a range of NGOs? What if we celebrated these partnerships with the same cute, tongue-in-cheek competition that we do for Erdős numbers? I wrote one paper with an NGO during my master’s and my dissertation committee includes a National Park Service employee, so I think my “Britt Number” is a solid 2. 

Reference:

Britt, M., Haworth, S.E., Johnson, J.B., Martchenko, D. and Shafer, A.B., 2018. The importance of non-academic coauthors in bridging the conservation genetics gap. Biological Conservation, 218, pp.118-123. 

*For more on how to conceptualize the space between conservation research and implementation, I recommend Toomey et al.'s paper 'Navigating the Space between Research and Implementation in Conservation' in Conservation Letters. Britt et al. consistently describe the 'conservation genetics implementation gap' but Toomey has me now questioning is this a gap? what is a gap? which is kind of a weird but rewarding rabbit hole. 

Are we playing (or hiking or skiing or climbing) too hard? Recreation, Ecology, and Recreation Ecology

In two consecutive years of my PhD, I spent the weekend before Thanksgiving 300 miles away from my family, fighting with temperature loggers in a National Park. This was not so much “opting outside” as desperately trying to install soil probes in raised beds that were basically garden-sized popsicles. But looking back, I perversely treasure those November trips to Maine and the chance to spend a quiet day on the mountain before the bell lap on the fall semester rushed through December. These last-minute-get-the-equipment-in-the-ground-before-the-snow-falls trips occurred in the years before REI created the #OptOutside hashtag, and on the wrong side of Thanksgiving anyway, since we are corporately encouraged #OptOutside instead of shopping on Black Friday. Regardless, this is the image in my head when I think about #OptOutside: standing alone below the summit of Cadillac Mountain under a grey Maine sky, snow flurries dotting my datasheet as the bare branches of the birches and maples and shadbush below fade to purple against the granite. It is rare to have Cadillac to yourself. Acadia is crawling with people opting outside year round: hiking, rock climbing, cross country skiing.

My research on plant communities was recreation-adjacent — I monitored phenology on hiking trails — but this fall I read four interesting papers exploring recreation ecology itself. Recreation ecology is the study of human impacts on landscapes where we play; this subfield is decades old with some foundational books (including Wildlife and Recreationists: coexistence through management and research and Wildland Recreation: ecology and management), but it is often neglected when we ecologists think about conservation (our prevailing views on conservation historically exclude people) or the top 100 papers in our field. Matthew Klingle wrote an excellent essay examining #OptOutside from the cultural and consumerism perspectives, critiquing the socio-economic assumptions about who gets to opt outside and where they get the gear they are hauling into the woods and artfully arranging for their instagrams. I am writing this post as the ecological companion piece: what are the impacts of our recreational activities on the plant and animal communities we hope to conserve? In honor of opt outside day — or for folks who are opting to read about the outside world — here are my top four 2017 papers on recreational ecology. 

Impacts of rock climbing on plant communities.

 Research on the ecological impacts of rock climbing received some press this year from the Sierra Club’s magazine. In a short piece, Diana Crow outlined recent findings that indicate climbing routes support less plant cover and lower biodiversity than unclimbed cliffs. Among these studies is a PLoS ONE paper from Juan Lorite on the Mediterranean limestone cliffs. Dr. Lorite told me that he did not approach the study of cliff flora from the perspective of a rock climber — “I have tried [climbing] but I would rather prefer to keep my feet staying on the ground” — however, “two students (Fabio Serrano and Adrian Lorenzo co-authors of this work) contacted me to do their master's thesis and end-of-degree project respectively, on the impact of climbing rock over plants. Both were biologists and also climbers and were worried about the impact of this activity.” Lorite and his colleagues paired unclimbed cliff transects with climbed transects across three levels of climbing use and used photographs to compare the plant cover and biodiversity on these cliffs.

Laura Boggess and co-authors used a similar methodology in Big South Fork National River and Recreation Area, Tennessee to survey the cliff flora of sandstone cliffs. Here, they carried 1mx1m quadrats into the field and visually estimated percent cover as they rappelled down, collecting plants, lichens, and mosses from either side of the vertical transect. Boggess, a mountaineer, got started climbing as a master’s student when the grant for this research was funded. She stressed the importance of studying the impacts of climbing from inside the climbing community: “it’s nice to have participation in the activity when you study its impacts, it improves communication across groups.” While the Sierra Club article generalizes that “few ecologists have enough climbing experience to do the work”, Boggess points out that the field work is not technically rock climbing up, it’s rappelling down. Often the hardest part was actually bushwalking to the tops of the cliffs. In addition, the Boggess’ coauthor, Gary L Walker, and his lab at Appalachian State, have been surveying cliff flora and writing reports for many years using standardized methods; they don’t often publish peer-reviewed literature and they were not included in the Sierra Club article. 

The “cliff” notes comparison of Lorite and Boggess’ results: climbed routes supported significantly less plant cover and diversity in the Mediterranean, but there was no difference in climbed and unclimbed routes in Big South Fork. Looking deeper, Lorite found that the more heavily used and overcrowded climbing routes were the most impacted; the more specialized (and less crowded) routes experienced relatively little damage. Boggess points out that Big South Fork generally receives low levels of climbing traffic — it’s routes are remote and undeveloped and it is located between two nationally recognized climbing areas in the Obed River Gorge and Red River Gorge. But, rock climbing is gaining in popularity nearly everywhere, including Big South Fork, and Boggess told me that anecdotally there do seem to be more climbers in Big South Fork since she conducted her fieldwork. In fact, part of her analysis included a creating a spatial model of the cliffs across the park: “we added a simple layer of climbing attractiveness to further specify which cliffs climbers may prefer to develop.”

One of the critiques of rock climbing studies in general is an oft-repeated maxim that climbers self-select routes with lower diversity because it’s easier to climb on bare rock. If this is the case, then comparing climbed routes to unclimbed routes is a biased methodology: the unclimbed routes aren’t a control and monitoring ideally should be before-after control-impact. Here, Boggess might have just published the ‘before’: her work identifies cliffs that are likely to become climbing routes and her results are a prime candidate for re-surveying to assess the impacts of increased climbing pressure in the future. Additionally, Boggess is very clear that the face of the cliff is not her main concern: “it hurts my heart to see trampled moss mats at the top of a cliff.” Her research found interesting and sensitive vegetation along the cliff tops, and she urges climbers to used fixed anchors instead of “topping out” and climbing over the edge of cliffs. Lorite also has advice for climbers hoping to minimize their impacts. “Some common practices are very harmful and should be abandoned, for example the conditioning process for a new route establishment usually consist of removing all the plants and to brush the rock surface removing all the mosses and lichens attached to the rock. Surprisingly this activity is called in the jargon as ‘gardening’ causing a high impact on plant community.” 

Cross country skiing and meadow vegetation

What about our recreation during the plants’ dormant season? A research group from Germany has a paper in press in Basic and Applied Ecology that explores the ecological impacts of cross country skiing on meadow vegetation. Manuel Steinbauer and colleagues looked at cross country ski tracks in the Fichtelgebirge, in northeast Bavaria; since floodlights were installed in 1979 for night skiing, the heavy grooming machinery has covered the same 84 km of tracks for over 30 years. I was unable to arrange an interview with Dr. Steinbauer or his coauthors, but I talked to Chelsea Little, a PhD candidate at the University of Zurich in Switzerland and editor-at-large for FasterSkier.com about this paper. Chelsea and I both read this paper last month when it was first available online as an accepted manuscript; we were intrigued by the paper’s bold title “Positive sport-biosphere interactions? − Cross-country skiing delays spring phenology of meadow vegetation.” First, we recognized that the conditions at the study site were somewhat unique in the heterogeneous world of cross country ski tracks. Chelsea writes: 

I think one thing to think about is that this doesn't necessarily mean that there is overall more maintenance of these trails than the non-lighted trails - the lighting is somewhat independent of the degree of other management. Also, they aren't, like, football stadium lights. They are fairly weak in a lot of places. It does mean that light pollution is a relevant question though! And also, having skiers moving around when it is dark probably has very different effects on wildlife, for example, than places where skiers are only out during the day...

I guess that this brings up one question I had about the study. There is a huge gradient in terms of how intensively ski trails are managed. Some very minimally, and they are only skied when there's enough snow to cover everything. On the other hand, I worked at a place in Vermont where we often scraped and graded the trails during the summer, used crowbars to pry out rocks, and reseeded the trails with grass, all with the purpose of making it possible to ski even when there's just a little bit of snow. Given the current climate, more and more cross-country ski areas are also investing in snowmaking. This will result in bigger and bigger mismatches in growing season length between the ski trails and surrounding areas, and also even bigger differences in water and soil moisture conditions.

 Steinbauer and his colleagues collected an incredible array of data on the vegetation and the conditions in plots on and off the tracks (similar to the climbed/unclimbed transects): flowering phenology, above-ground biomass, species composition, snow cover, soil frost, soil moisture, soil density, daily radiation, and detailed interviews with the landowners! Ultimately, they found no significant difference in plant species richness or biomass production between the ski trails and the off-trail plots. However, flowering phenology was delayed by almost two days on the ski track. They conclude that on these trails — which are lit and groomed but receive no artificial snow — the impact of ski trails on the meadow vegetation is minimal, and may be seen as a “positive” because they add environmental heterogeneity. Both Chelsea and I were wary of this broad conclusion. From my background in plant phenology, I wanted to know more about this delayed flowering: what were the pollinators doing? Was there gene flow between the on- and off-trail plant populations? Chelsea took a hard look at environmental heterogeneity: 

It seemed rare to me that creating environmental heterogeneity where there was none before would be considered a positive outcome. I totally understand that heterogeneity can be great in promoting metacommunity stability, for example. In my mind, however, when trying to apply this in a conservation setting, it would be more about trying to stem the homogenization of habitats that comes with development, large-scale agriculture, or some managed forestry…But in this case of this paper, it seemed like they are talking about doing the opposite: taking an intact-ish piece of habitat (although it is a set of meadows which are mowed by the landowners, so not exactly pristine), and making it more heterogeneous.

 Ultimately, the ecological impacts of ski trails depend on the local management decisions and the vegetation is not the only aspect of the environment that may be affected. Last summer Chelsea wrote at piece for FasterSkier.com about the impacts of skiing on wildlife. She reflects: “It was interesting to see the reaction from skiers - this is a demographic that in general is fairly environmentally conscious (after all, they spend a lot of time outdoors), but I would say that overall they did not seem impressed that we should change our trail design/layout for the benefit of wildlife, as it is felt that cross-country skiing is a very low-impact activity compared to many others (i.e. snowmobiling, downhill skiing). But I hope that people will start being more thoughtful about how we fragment the forest even with these seemingly low-impact trails, and leave some big chunks of habitat undisturbed.” 

Wildland recreation disturbance at broader scales: hiking & wildlife

 Finally, the cover picture of the November issue of Frontiers in Ecology and the Environment features a line of photographers angling for a shot of a bison. Inside, Kevin Gutzwiller and coauthors explore the impacts of wildland recreation (like hiking and wildlife photography) at a broad scales — think entire parks instead of individual cliff faces — through GIS and statistical approaches. I talked to Gutzwiller and his coauthor Ashley D’Antonio about this paper and the field of recreation ecology in general.

Gutzwiller literally wrote the book (Wildlife and Recreationists) on recreation impacts on wildlife. When comparing impacts on plants and animals, he says it’s “fundamentally an issue of movement. Plants ten feet off of a trail may be safe from trampling. Wildlife can move but that doesn’t mean they are less susceptible. It’s harder to link the impacts to disturbance.” D’Antonio echoed: “wildlife impacts are hard to measure at the population level: if you flush a bird, how does that affect the bird populations? A lot of recreation ecology studies are very site specific…this is a smaller scale than that at which wildlife actually function and live in the ecosystem. This is a major constraint to studying wildlife impacts.” Their paper aims to help conservation managers scale up and look at recreation as another layer on the landscape. They both stressed that the field of recreation ecology wants to get people outside: they want their research to provide opportunities to enjoy the landscape, while minimizing impacts. Here, they hope their conceptual paper can get managers thinking about what they already do — using GPS techniques to see how visitors interact with resources — and adding two statistical approaches to quantify disturbances and model them across landscapes.

I asked Gutzwiller and D’Antonio about the intersection of their recreation ecology research and their personal outdoor recreation hobbies. Gutzwiller is an all-around outdoorsman who enjoys cross country skiing, snowshoeing, hiking, fly fishing, and hunting. “Getting out into remote wild areas is what I live for — I'd love to be there almost all of the time. You get insights out there you can’t get from looking at walls.” He says that knowing the literature, “knowing how subtle disturbances can affect animals influences how I recreate.” D’Antonio, an avid hiker — “it’s pretty much what I study too, mostly-foot-based recreation, boots on the ground type of impact” — worries that she’s becoming an annoying hiking companion between pointing out the social trails and stopping for photographs of signage instead of views. She says that though it can feel like work “because I can’t turn off seeing the impacts,” work and play can overlap a lot in recreation ecology. Getting outside is “an opportunity to clear your head, do the deep work, and think creatively.”

Throughout my interviews for this post scientists told me this repeatedly: getting outside improved their work. The #OutdoorsyScientist hashtag in September 2017 made it pretty clear that many scientists on twitter — from the recreation ecologists to the lab-bound biologists and indoor modelers — find restoration, renewed energy, and stress release in the great outdoors. Those scientists who have dug into the research on recreation impacts, or who are actively engaged in the studies themselves, seem universally conscientious of their footprints, ski trails, and climbing routes. I hope their work and their thoughtfulness ripple out across the outdoor communities as we opt outside today and in the future. 

Finally, I want to share Gutzwiller’s enthusiasm for working on this 2017 wildland recreation paper: “I had a blast working with Ashley [D’Antonio] and Chris [Monz]! They’re fabulous. I wish they worked down the hall from me!” This conversation made my heart grow three sizes a la the grinch. My holiday wish is that we all end up with coauthors who gush this way about us.

References:

Gutzwiller, Kevin J, Ashely L D’Antonio, and Christopher A Monz. 2017. Wildland recreation disturbance: broad-scale spatial analysis and management. Frontiers in Ecology and the Environment. 15(9): 517-524, doi: 10.1002/fee.1631

Boggess, Laura M, Gary L Walker, and Michael D Madritch. 2017. Cliff flora of the Big South Fork National River and Recreation Area. Natural Areas. 37(2):200-211.

Lorite, Juan, Fabio Serrano, Adrian Lorenzo, Eva M. Cañadas, Miguel Ballesteros, and Julio Peñas. 2017. Rock climbing alters plant species composition, cover, and richness in Mediterranean limestone cliffs. PLoS ONE. 12(8) https://doi.org/10.1371/ journal.pone.0182414

Steinbauer, M.J., Kreyling, J., Stöhr, C. and Audorff, V., 2017. Positive sport-biosphere interactions?− Cross-country skiing delays spring phenology of meadow vegetation. Basic and Applied Ecology.   

Biodiversity Patterns in Melanesian Coral Reef Fish: New Research with Old Naturalists

Old naturalists are my jam. I dedicated my PhD dissertation to a 19th century botanist who had spent her childhood following Thoreau around the Concord woods. I have a soft spot for research that draws on the work of older ecologists, for data that was handwritten before the advent of ballpoint pens, for 21st century papers based on museum natural history collections. This nostalgia is well-timed: museum collections are increasingly digitized and freely available online, and the Biodiversity Heritage Library is doing the same for scientific literature on biodiversity.

Just as my kind of fieldwork no longer requires taking the steamship to downeast Maine and a buckboard on wild roads between logging communities, my scholarship is not dependent on scouring the library stacks for a particular volume or traveling to the archives of a natural history collection to comb through specimens for just the right sample. In the 21st century it is significantly easier to be an armchair laptop historical ecologist. Easier, but not easy.

“Natural history and collections seem to be a bit of a hard sell when it comes to the ecological literature, which surprised me,” says Dr. Kathryn L. Amatangelo. She and Dr. Joshua Drew just published a PLOS ONE paper using coral reef fish data from museum collections records, peer reviewed literature including fish check lists, and biological inventories. The biodiversity pattern they were attempting to analyze and understand — that reef fish diversity in the Indo-West Pacific decreases along a longitudinal gradient from species-rich Papua New Guinea to species-poor American Samoa — was described in 1906.

Amatangelo laments, “It seems almost passé to look at old collections and think about how and why long-dead historians collected their data. When you try to combine that with statistics and scientific analyses people seem to get a little squirrely.”

Drew and Amatangelo’s paper “Community Assembly of Coral Reef Fishes Along the Melanesian Biodiversity Gradient” applies modern ecological theory and big data statistical tools to observations recorded by David Starr Jordan, a Victorian-era ichthyologist who was both the founding president of Stanford University and a suspect in the possible murder of Jane Stanford. If that legacy is not problematic enough, he was also into eugenics.

Thanks to the efforts of Biodiversity Heritage Library (BHL), we can read Jordan’s 1906 paper “On a Collection of Fishes from Fiji” where he notes the diminishing diversity of fish as you travel across Melanesia. Drew remarks, “historical ecologists are always looking for old species lists, and it was super cool to find that he worked in my study system in Fiji.” Drew describes a Jordan as “an ichthyological hero of mine, a complex and not unproblematic figure”: Jordan’s writing on ichthyological biogeography and community change, his system for organizing ichthyological collections and his service on the US Fish Commission, a precursor of NOAA, provide a foundation for the kind of work that Drew and Amatangelo so beautifully execute here.

In the pursuit of quantitatively describing this biodiversity gradient, Drew and Amatangelo compiled presence/absence records for 396 fish species in five taxa across 7 countries. As Drew describes it, this dataset was created from “a massive literature search from collections-based and peer-review based lists that were then double-checked with FishBase.” They looked for agreement across all three datasets (collections, literature, and FishBase), which gave them more confidence in the data since it was not susceptible to the biases present in only one dataset. Amatangelo is a community ecologist with a plant background, she partnered with Josh Drew through a twitter connection, bringing statistical savvy to these new-to-her taxa and ecosystems. I asked her what it was like to work with unfamiliar study species in this project. “One downside was that things that were intuitive to Josh, such as why some traits are important, was a bit of a mystery to me. That could also be considered a positive, though, because it meant that Josh had to be able to explain WHY they were important, which helped in writing the paper.”

The paper’s ultimate goal was to illuminate the processes behind the reef fish biodiversity pattern to inform conservation efforts. Drew acknowledges that their conclusions are not ground-shattering — the biodiversity gradient was described 110 years ago, and likely broadly known before then in local communities. “But it’s nice to put a p-value on it,” he says. “Natural history and traditional ecological knowledge are not always recognized because they don’t come with a p-value, so here we did that. We probably could have told you the same result before, but this adds weight to the management recommendations.” Those management recommendations include collaborations across Melanesia to more efficiently share resources and partition the region into functional biodiversity groups.

Through the power of twitter, digitization, and online collections two modern ecologists were able to build on a paper from 1906 and study Melanesian coral reef fish diversity from their laptop screens in the United States. So much of this data would be instantly recognizable to Jordan, but so little of the actual process of collaborating, compiling and analyzing data, and writing a paper has remained constant since 1906.

Drew reflects on this revolution in his recent correspondence to Nature Ecology and Evolution: “Digitization of museum collections holds the potential to enhance researcher diversity.” He and coauthors write that “the advent of digitization (open access to images and specimen data) now makes a wealth of biodiversity information broadly available…Digitization allows access to museum holdings to those for whom collections have typically been out of reach.” The concentration of collections in the Global North is a reflection of our discipline’s role in the history of exploration and colonialism. Untangling this broader context of past research is perhaps the most impressive, thoughtful work that a historical ecologist could pursue.

In two papers this fall Drew has managed to both uphold the ichthyological legacy of Jordan, and articulately argue that the museum collections Jordan once organized in his spare time from being abhorrently racist, could be, in digital form, a force for increasing diversity in science. 

References:

Drew, Joshua A., and Kathryn L. Amatangelo. "Community assembly of coral reef fishes along the Melanesian biodiversity gradient." PloS one 12, no. 10 (2017): e0186123.

Drew, Joshua A., Corrie S. Moreau, and Melanie L. J. Stiassny. "Digitization of museum collections holds the potential to enhance researcher diversity." Nature Ecology & Evolution (2017):10.1038/s41559-017-0401-6