Category: Perspectives

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Hidden legacies: what do colonialism and natural sciences have to do with each other?

by Midori Yajima

How unlikely it is to think that many people who decided to dedicate themselves to a natural sciences-related field wondered at least once about the life of an eighteenth-century naturalist?

Picture Alexander von Humboldt, Charles Darwin or Joseph Banks expeditions, or René Malaise and Gustav Eisen‘s impressive efforts in gathering human specimens and artefacts. How about Roderick Murchinson and his geological surveys around the world, or Hans Sloane, whose collections contributed to the foundation of London’s beloved British Museum? The imaginaries of explorers crossing oceans towards yet unknown territories, observing and sampling specimens never seen before, naming and using them to interpret the world, are striking, to say the least.

Nevertheless, other narratives are growing beside these settled imaginaries. It is increasingly recognised how those exact figures were far from the idea we have of them: solitary geniuses and intrepid explorers, nothing related to the politics and economies of their time. Instead, their journeys would rest on the routes of British imperialism, making use of the slave trade in the case of Sloane,1  or be sponsored by intelligence operations on foreign valuable minerals and local policies such as the case of Murchinson2. Even an important institution such as the Royal Botanic Garden in Kew now acknowledges how the boost that botanical research saw at the time was supported by interests in new profitable plants3. Likewise, it is recognised how the global network of botanic gardens emerged not only to create pleasant green spaces but also to have experimental facilities dedicated to researching those exotic new plants for valuable products. As a matter of fact, the search and cultivation of plants such as the rubber tree, a source of such a profitable material, or the Cinchona tree, from which the compound quinine was isolated and used against malaria by the occupying forces in the tropics, have been central to the expansion of the British empire4. The very same collection of animal, plant and human samples can be considered to be driven by similar dynamics. What was discovered in the colonised territories was taken, shipped to the collectors’ homelands, and then housed in centres that, in turn, expanded to accommodate the increasing flow of materials, being a source of knowledge for the benefit of their host institutions. This colonial dimension of the sciences that study nature remained unaddressed in the mainstream imaginaries, although some already glimpsed it. Like Sir Ronald Ross, a doctor engaged in the fight against malaria in the Sierra Leone colonies, who in 1899 publicly expressed how the success of imperialism in the following century would largely depend on success with the microscope 5.

Much has been written about “how modern sciences were built on a system that exploited millions of people, at the same time justifying and supporting it to an extent that greatly influenced how Western people view other ethnic groups and countries”6. At the same time, others point out that “one should not fall into the prospective error of asking nineteenth-century men to reason with post-colonial categories developed after World War II” 7. Likewise, those who work or are interested in these fields today might easily feel far from this legacy, either because of the time that has passed since that era or because of the desk-based nature of their research. Why think about it then? Wasn’t this a blog just about ecology and evolution?

Yet, systems linked to colonial trauma continue to shape the experience of many ecologists, naturalists, biologists, and even anthropologists, today. At the same time, many narratives are still influenced by worldviews that see the advances in the natural or biological realm as carriers of better health, civilization or culture. The consequences of these processes are tangible. A perspective article in Nature Ecology and Evolution8 speaks of colonialism in the mind first, referring to the way a Western scholar might relate to knowledge. From the simple use of language, as when talking about the Neotropical region (new to whom?), or the overwriting of Latin names, sometimes derived from the names of their European discoverers, to the traditional names by which some species are recognized, often more informative about behaviours or characteristics of that species. It could be through devaluating local knowledge, oral traditions, and artefacts that made it possible to navigate an environment in a surprisingly (for us) detailed way, relegating them to folklore or anecdotes, going so far as to claim scientific discoveries, for example, medical properties of plants, already known and shared by local communities for a long time. Fuelling the idea that any active ingredient or species is only really discovered when it enters Western scientific literature, even if they come from a non-systematic and oral knowledge that a population held for centuries.

Figure from Trisos et al. (2021). Map showing the minimum estimate for each country of the number of bird species for which the Latin binomial name is based on a European person.

Other than the mindset, inequalities are also visible on a very practical level: the scientific subordination of formerly colonised countries to researchers of the so-called Old World, better known as parachute or helicopter science. The role of local scientists has often been reduced as labourers employed in data analysis and collection for Western scientists. Adding to this, there are the issues with accessing that same knowledge produced in the ‘Global North’, either because samples or data are stored in museums or servers far away from the places they were collected, the absence of high-speed internet, the lack of the right networks, visa issues for accessing conferences9, or simply the high costs of publishing or even accessing scientific literature. Other ways in which parachuting occurs are through drawing on the traditional knowledge of these countries, when this is not belittled, cataloguing and publishing information without mentioning the contribution of local curators and experts.

Figure from Asase et al. (2022). Summary of the relationship between the number of authorships (i.e., representation as author or coauthor) on 9935 papers on “ecology” or “conservation” in Web of Science, for 2015–2020 versus per-capita gross domestic product (GDP).

Another important discussion is about climate change mitigation and rewilding projects when benefits that will be experienced globally demand costs to be felt locally, especially when adequate resources and support are not provided, or when measures impose worldviews external to local values and needs. The same article brings the example of a no-fishing zone established in French Polynesia which was detrimental to local fishermen’s needs, thus ending in simply not being respected and ultimately not helping the conservation efforts on the target fish stock. Top-down management of this kind proved itself to be not only erosive for people’s self-determination but also undermines the very objective of the project.

Many of the difficulties in the field of land management and nature conservation stem right from the relationship with local communities: other risks beyond not considering them (as in the case above), is romanticising them, possibly falling into the Western myth of the good savage, or assuming that indigenous people are willing to do what we ask. Rather, it would be important to recognize that like any human community, the local people we encounter during our work as scientists might have legitimate political, cultural and economic aspirations that could differ from our expectations.

Decolonizing the natural sciences is not a trivial matter. It certainly does not mean throwing away all that has been learned so far and starting afresh, making only use of ancient artefacts and indigenous tales. For many, it is a matter of reflecting critically on their profession, on the political context that allowed the development of each one’s work, on the power structures to which science might have contributed, taking dignity away from some bodies more than others. To “take a stand and recognize ourselves as part of the system we wish to describe, rather than as neutral actors, becoming aware of how backgrounds and training influence the questions that are asked, trying to understand how the data is interpreted and how our work might intersect with the power of companies or extractive interests over a place” 8.

Decolonization would not only be a matter of awareness but also make sure that research methods and implications are not in contrast with local values and management. This would certainly restrict researchers’ access or capacity for action, but it would be an important trade-off for all those who repeatedly had to give up their territories or lifestyles.

Discussions like this are indeed taking root. It happens when researchers use local languages alongside the traditional binomial taxonomic system, or initiatives are taken from established institutions, such as the case of the American Ornithological Society and its statement for changing harmful and exclusionary English bird names thoughtfully and proactively for species10. Or like the Biodiversity Heritage Library, now working to make their materials available in languages other than English11, the Pitt Rivers Museum12 and London’s Natural History Museum13, with their projects aimed at sharing the stories of colonialism behind their collections. More and more resources are becoming available for establishing healthy stewardships with indigenous communities14 or addressing parachute science15,16,17, or simply engaging with diverse experiences from diverse scholars18, 19.

On a side note (but not really), it is also worth mentioning the call for an intersectional approach to these challenges. Noticing how an individual’s capacity to contribute to public and scholarly discourse does not only rely on race/ ethnicity, but similar power dynamics might be in place based on gender, nationality, indigeneity, wealth, spirituality, sexuality, parenthood/dependencies and other identities. “An intersectional approach to practising ecology recognizes the multiple barriers and opportunities facing those working together”8.

These discourses might seem marginal to someone working now on their own seemingly unrelated passion project. Nevertheless, reflecting on how plants, animals, environments, and people intersected and influenced each other in different directions is indeed relevant.

Among all, it is the field of ecology and evolution that explores the relationships between living beings and the environment in which they live. Acknowledging diversity, not only in biological terms but also within systems of knowledge, solutions and stories of the people who are part of it – including their gender, ethnicity and nationality – is certainly a way to widen one’s lens on the world.

Figure from Trisos et al. 2021. Actions that support reformulating research questions and processes for a decolonizing ecology. Credit: Keren Cooper (illustrations).

I am a visiting researcher at Trinity College Botanic Garden, working on the establishment of its long-term environmental monitoring program and interested in the human dimension of ecological systems dynamics. I wrote this post from the perspective of a western, female, early career researcher, and by no means do I wish to take ownership of the views of those who experience inequity and discrimination on a daily basis, nor do I believe this offers a complete or global understanding of such a complex problem. Rather, I hope to contribute to mainstreaming such an ongoing struggle, thanks also to the encouragement coming from discussing and comparing with peers.

This post is based on an original article I wrote for the Italian organisation Lupo Trek (https://www.lupotrek.it),  inspired by reading both academic articles (linked in the text) and outreach pieces such as Deb Roy, R (2018). Decolonise science – time to end another imperial era on The Conversation (https://theconversation.com/decolonise-science-time-to-end-another-imperial-era-89189),  Chatterjee, S. (2021). The Long Shadow Of Colonial Science in Noema Magazine (https://www.noemamag.com/the-long-shadow-of-colonial-science/), Boscolo, M. (2018). Decolonizzare la scienza. Il Tascabile (https://www.iltascabile.com/scienze/scienza-colonialismo/), and  Wong, J. (Host), (2021, Mar 10). Dirt on our hands: Overcoming botany’s hidden legacy of inequality (No. 7) in the podcast Unearthed – Mysteries from an Unseen World of the Royal Botanic Garden Kew (https://omny.fm/shows/unearthed-mysteries-from-an-unseen-world/dirt-on-our-hands-overcoming-botany-s-hidden-legac).

References

  1. Olusoga, D. (2020). It is not Hans Sloane who has been erased from history, but his slaves. The Guardian. https://www.theguardian.com/commentisfree/2020/aug/30/it-is-not-hans-sloane-who-has-been-erased-from-history-but-his-slaves
  2. Stafford, R. A. (2002). Scientist of empire. Sir Roderick Murchison scientific exploration and victorian imperialism, Cambridge University Press. ISBN: 9780521528672. https://www.cambridge.org/ie/academic/subjects/history/history-science-and-technology/scientist-empire-sir-roderick-murchison-scientific-exploration-and-victorian-imperialism.
  3. Nazia Parveen (2021). Kew Gardens director hits back at claims it is ‘growing woke’. The Guardian. https://www.theguardian.com/science/2021/mar/18/kew-gardens-director-hits-back-at-claims-it-is-growing-woke
  4. Bathala, D. (2020). Botanic Gardens and Quinine: To Cure or Colonize? Places Journal. https://placesjournal.org/workshop-article/botanic-gardens-and-medicine-to-cure-or-to-consume/
  5. Anonymous (1900). The Malaria Expedition to West Africa. Science, 11:262, 36-37. https://doi.org/10.1126/science.11.262.36
  6. Deb Roy, R (2018). Decolonise science – time to end another imperial era. The Conversation. https://theconversation.com/decolonise-science-time-to-end-another-imperial-era-89189
  7. Boscolo, M. (2018). Decolonizzare la scienza. Il Tascabile. https://www.iltascabile.com/scienze/scienza-colonialismo/
  8. Trisos, C.H., Auerbach, J. & Katti, M. (2021). Decoloniality and anti-oppressive practices for a more ethical ecology. Nat Ecol Evol 5, 1205–1212. https://doi.org/10.1038/s41559-021-01460-w
  9. Martin A. Nuñez (2022), Twitter thread, https://twitter.com/Martin_A_Nunez/status/1559518587127209985?s=20&t=VTOo8e8muypwznf5ldc_Jg
  10. AOS Leadership (2021), English Bird Names: Working to Get It Right. https://americanornithology.org/english-bird-names/english-bird-names-working-to-get-it-right/
  11. Ponce De La Vega, L. (2020). Towards Online Decoloniality: Globality and Locality in and Through the BHL. Biodiversity Heritage Library Blog. https://blog.biodiversitylibrary.org/2020/09/towards-online-decoloniality.html
  12. Pitt Rivers Museum. Critical changes to displays as part of the decolonisation process. https://www.prm.ox.ac.uk/critical-changes
  13. Das, S. & Lowe, M. (2018). Nature Read in Black and White: decolonial approaches to interpreting natural history collections. Journal of Natural Science Collections 6, 4 ‐ 14. https://natsca.org/article/2509
  14. Indigenous Land & Data Stewards Lab (2022). Understanding roles and positionality in Indigenous science & education. https://www.indigenouslandstewards.org/resource-hub-blogs/understanding-roles-and-positionality-in-indigenous-science-and-education
  15. Armenteras, D. Guidelines for healthy global scientific collaborations. Nat Ecol Evol 5, 1193–1194 (2021). https://doi.org/10.1038/s41559-021-01496-y
  16. Asase, A., Mzumara-Gawa, T. I., Owino, J. O., Peterson, A. T., & Saupe, E. (2022). Replacing “parachute science” with “global science” in ecology and conservation biology. Conservation Science and Practice, 4( 5), e517. https://doi.org/10.1111/csp2.517
  17. Singeo, A., & Ferguson, C. E. (2022). Lessons from Palau to end parachute science in international conservation research. Conservation Biology, 00, e13971. https://doi.org/10.1111/cobi.13971
  18. Shaw, A.K. Diverse perspectives from diverse scholars are vital for theoretical biology. Theor Ecol 15, 143–146 (2022). https://doi.org/10.1007/s12080-022-00533-1
  19. Ramírez-Castañeda, V., Westeen, E., Frederick, J., Amini, S., Wait, D., Achmadi, A., Andayani, N., Arida, E., Arifin, U., Bernal, M., Bonaccorso, E., Bonachita Sanguila, M., Brown, R., Che, J., Condori, F., Hartiningtias, D., Hiller, A., Iskandar, D., Jiménez, R., Khelifa, R., Márquez, R., Martínez-Fonseca, J., Parra, J., Peñalba, J., Pinto-García, L., Razafindratsima, O., Ron, S., Souza, S., Supriatna, J., Bowie, R., Cicero, C., McGuire, J. and Tarvin, R. (2022). A set of principles and practical suggestions for equitable fieldwork in biology. Proceedings of the National Academy of Sciences, 119(34). https://doi.org/10.1073/pnas.2122667119

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Studying Ireland’s ocean giant: An interview with basking shark researcher Haley Dolton

Studying Ireland’s ocean giant

An interview with basking shark researcher Haley Dolton

The basking shark, Cetorhinus maximus, is the second largest shark in the world and is regularly seen swimming off the coast of Ireland. But how much do we really know about these ocean giants? In this installment of the EcoEvo blog our co-editor, Lucy Harding sat down with PhD candidate and basking shark researcher, Haley Dolton to find out what it’s like studying these enormous sharks.

Lucy: So Haley, what was it about sharks that first got you interested in them?

Haley: I remember first being interested in sharks when I was reading an encyclopedia of animals and I read that sharks were fish! And that kind of blew my mind because of what I knew about sharks, they were more like mammals in my head; really powerful, can birth live young, can be social. So yeah, that really intrigued me. And when I started reading about them (because this was before the Internet!), and learnt more, like that they have these amazing senses, electrical senses, and they’re capable of doing amazing behavioural things, I think that really sparked my interest in sharks.

Three basking sharks swimming together in Irish waters (photo captured by Haley Dolton).

Lucy: What sets basking sharks apart from other large-bodied sharks, for you? Why study them over white sharks for example?

Haley: I know this sounds almost like a throw-away answer but I actually kind of fell into basking shark research, and then I grew to love them! It was the first opportunity that I was given to work in shark research in the Isle of Man, working with Manx Basking Shark Watch, and I just remember the first time I saw one I was like, “Oh my God, what is that?!” and it came right up to the boat, and I remember being shocked by the size of it! Any shark documentaries I’d seen, the only sharks really that were featured years ago were great whites because they’re the most *air quotes* “exciting” shark, but then I saw this basking shark, with the way it swims and what it looks like and I thought “Oh that looks like a great white but it’s massive!”. I think that that really sparked my interest in them.

Haley Dolton surveying for basking sharks on the bow of the research boat.

I learned more about them from being in the field and reading about them, I was trying to figure them out because they didn’t make a lot of sense to me. For example, they feed on zooplankton (so they’re filter feeders) and they’re the second largest shark species capable of undertaking powerful behaviours, but they feed on microscopic prey, all of this got me thinking “How are they doing this?!”. So I got obsessed with how weird they are! Like how are they behaving like they do?! As another example, they aggregate in large numbers, and we don’t really know why!

(Haley scans the water hoping to spot a shark fin. Photo captured by Dr Nicholas Payne).

We think it’s maybe related to mating or for saving energy, as they swim close to each other, but you know seeing that in the wild, for yourself, it really sparks the ideas in the mind and that set me on the path to studying basking sharks over any other shark species. That’s not to say that I’m not interested in other shark species of course, but more that it was just circumstance which led me to basking shark research in the first place, and then I fell in love with how weird they were!

Lucy: Well, that’s a good point you make in that, for research, you don’t always have to follow a particular species or a particular project. If you more follow opportunities, you never know where they’ll lead you to, and it could lead you into something that interests you more than you realised!

Haley: Yeah, that’s it! When I went to the Isle of Man, I learned loads about research and what areas of research there were. So, for instance, we were doing satellite tagging and collecting DNA samples and this is what I actually wanted to go into at the time, I wanted to use DNA to carry out genetic research of shark species and look at the evolution of traits. And so, I originally started off being interested in that question and then when I saw that they were doing this amazing satellite tagging work, with behavioral and social studies, whether that’s on the human side, so looking at the impact of anthropogenic activity on basking sharks, or whether that’s the social side of the fish themselves, studying how they gather in large numbers! So, that’s where I first got introduced into loads of different scientific areas of research which focused on this one species.

“without knowing enough about your study species, you can’t effectively conserve them”

Lucy: So, are basking sharks an endangered species?

Haley: Yes, basking sharks are an endangered species. They’re endangered globally which means that they’re of ‘conservation concern’. The reason that we’re researching them, particularly in the Payne lab at the minute, is because we don’t really know a lot about what makes them tick.

Aerial view of basking shark feeding off the West coast of Ireland. The gills can be seen fanned open as the animal filter feeds (photo captured by Haley Dolton).

We’re trying to learn more about them because without knowing enough about your study species, you can’t effectively conserve them. To give an example, imagine if someone was trying to conserve me and they saw one day – let’s pick a really bad day – where I’ve gone to the pub for hours, then eaten a pizza, and I haven’t really moved a lot. It might make people think, that’s all I do so let’s give her that all the time! Well, I wouldn’t last very long! I’d have a great time, but I wouldn’t be very healthy.

And that’s why we study these animals, to get as much information as possible to really affect conservation policy and change because these are vulnerable species.

There were massive fishing industries for them, including in Irish waters, and although we no longer have those fisheries, they’re still very vulnerable to being accidentally caught in things like pot lines or in other fisheries related equipment. They are a vulnerable species to lots of kinds of anthropogenic activity, making conservation efforts even more important.

Two basking sharks swim underwater, off the West coast of Ireland (photo captured by Haley Dolton).

Lucy: And you said they are filter feeders and very large, so does that make them a difficult species to study?

Haley: Basking sharks are an unusual study species for sharks, in that we can’t fish for them or attract them to the boat, so we can’t research them in the ways we would with other species where you can do that. So, we’re very dependent on where and when they turn up and whether there’s a good weather window for us to get out and study them, which off the Irish coast is quite rare! So, everything needs to come together to allow us to go out and study them and in reality, I only have around six days to get my tags deployed, which just highlights how difficult they are to study.

Lucy: What does your current research on basking sharks focus on? 

Haley: My current research really focuses on getting back to basics of what we know about the general biology of these animals. For example, looking at their anatomy, whether that’s the larger structures or microscopic features. I’m looking at how their anatomy can explain their behavior. So, as I said there’s so much we don’t know about basking sharks.

At the minute, off the Irish coasts, we’re getting hundreds of them in the spring and then later on throughout the summer, and they’re displaying this amazing behavior where they all gather and swirl around each other, which we think might lead to mating, but ultimately we don’t really know why they display this behaviour! So, my research is really focused on trying to explain these behaviors by looking at their anatomy and physiology and what we as scientists, the general public, or policymakers, can do to effectively conserve this species in Irish waters.

“it’s a really exciting time to be part of basking shark research in Irish waters”

This is all going on at an exciting time for basking sharks in Irish waters! Recently it was announced that they’ll hopefully gain protection under the Irish Wildlife Act and there’s been incredible public support for this in Ireland so it’s a really exciting time to be part of basking shark research in Irish waters and to hopefully make a positive change within their conservation.

Lucy: And when you’re out in the field, how do you actually study these animals?

Haley: Well, firstly we work closely with other researchers and the general public who very kindly tell us where and when they see the sharks; we’ve had loads of great sightings (and skippering of boats!) from the Irish Whale and Dolphin Group (IWDG) and individuals from different tour operators off the Irish coast like West Cork Charters (Dave Edwards) and Nick Masset (also part of IWDG), whose based near the Blaskets in Dingle, and of course, social media, which tells us where and when sharks have been seen. Then, we’ll scramble to get all our field kit ready and head over to the West Coast!

Normally with shark research we go out to a place where people are already fishing for sharks (for catch and release) or where we’re fishing for them for scientific research and this normally involves attracting them to the boat (with bait) but because we can’t do that with basking sharks, we basically drive the boat up and down the coast slowly, surveying with binoculars to try and spot that characteristic fin sticking out of the water.

The dorsal fin of a basking shark breaking the surface. Three other sharks can be seen finning behind also (photo captured by Haley Dolton).

Lucy: And so, when you do spot a fin, what happens next?

Haley: In basking shark research we actually deploy the biologgers without touching the shark at all (apart from the actual deployment itself). We carefully approach the shark in the boat, deploy the tag, and then we’re off again! This all takes a matter of seconds, so that we’re actually only beside the animal for a couple seconds as we deploy the biologger. Some sharks don’t even react at all, they just carry on swimming or feeding at the surface, which is a good indication they haven’t been disturbed.

I should point out that any research we do on sharks is conducted under license from the HPRA (Health Products Regulatory Authority) ethics board for animal studies, as to not cause stress to the animals.

Haley uses a radio antenna to listen for the radio tag they have attached to a basking shark (photo captured by Scott DeGraw).

Lucy: How is your research going so far? What are your plans going forward for the research?

Haley: The research that is focused on basking shark biology, ecology and behavior has gone really well so far and we’ve found out some really, really interesting things which I’m dying to talk about but I can’t at the moment, but watch this space! There’s lots of cool stuff coming soon!

My research interest has grown from my supervisors, Nick Payne, Andrew Jackson and Jonathan Houghton, supporting my curiosity for this species and a collaboration I made when I first started shark research all those years ago (Jackie and Graham Hall who ran Manx Basking Shark Watch). Now this project is growing and we’ve established new collaborations with some incredible researchers from Oregon State University (Big Fish Lab) and Stanford University, who came over this year for fieldwork. Together, we’re trying to collect and analyse even more data about what the sharks are doing and how they’re behaving. There’s been lots of steep learning curves with doing this research as well, but overall, it’s gone really well and we found out some really cool stuff, which will hopefully come out soon!

“if you do see something, take lots of pictures”

Lucy: That’s great, I can’t wait to see what you’ve found out! Well, for my last question, as a lot of our readers may not necessarily be in the scientific field, is there any way they could get involved in conservation efforts or research to help these threatened sharks?

Haley: Yes! People can get involved by reporting their sightings of any sharks to groups such as the Irish Basking Shark Group and Irish Whale and Dolphin Group and these can feed into scientific research. Also, if you do see something, take lots of pictures because then it’s possible to identify individuals by nicks and cuts on their dorsal fin and this is a great example of a non-invasive way of looking at social behavior or whether sharks are returning year on year to an area, indicating it might be an important area for feeding or breeding or pupping.

You can also get involved with any campaigns that you see going on for the protection of these animals. Support from the public, alongside the work and support from Minister Noonan and TD Jennifer Whitmore is actually what was instrumental in the recent campaign to have the basking shark added to the Irish Wildlife Act; it was a great campaign led by the Irish Basking Shark Group to get basking sharks protection in Irish waters and part of that was a petition that was signed by the general public. It gained incredible support from the public, with I think over 20,000 signatures, which is amazing and hopefully they’ll be protected under Irish law soon.

Haley is a PhD student in Zoology at Trinity College Dublin, and you can find her on Twitter @haleydolton. Haley’s work has been funded by the Irish Research Council, with support from the Fisheries Society of the British Isles. Nick Payne is funded by Science Foundation Ireland.

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Biodiversity in brownfields

Moving from Dublin City to rural Ireland as a child was a bit of a shock to my system. Up to that moment I had grown up surrounded by pavement and tall dull buildings as far as the eye could see, however, now I lived in a house surrounded by fields upon fields of cattle and crops. I thought I lived in an area surrounded by nature, but it wasn’t until I got older that I realised the endless stretches of fields around me all contained the same few species.

Credit cover picture: Dissonancefalling is licensed under CC BY-NC-SA 2.0

As a child, I gave little thought to this homogeneity. The one thing around me that did catch my attention was the large deserted building site at the back of my house. Like many, we moved into a brand new housing estate during the Celtic Tiger, only for the inevitable bust that occurred shortly after we moved in to halt the construction on the rest of the estate. As children, we were always warned to stay away from the empty site. Filled with abandoned equipment and precarious structures, the place was a death trap. For years, despite the odd bonfire on Halloween, the site remained virtually untouched. Forever to be labelled an eyesore. A waste of land.

That was until I went to university to study Zoology and took a module in Restoration Ecology. During this time, I learned that Mother Nature may not have been as idle over the many years that construction companies have been. The term brownfield site came up on my radar and I realised that maybe that eyesore at the back of my estate might hold more value than I previously believed.

On-site images of the Brownfield site. Credit: Aoife Cahill

What are brownfield sites?

Brownfield sites have been defined as “land that was previously developed for housing or industry but has since been abandoned and recolonised by different ecological assemblages” [1]. While these sites are typically described as “dangerous” or “eyesores” and can have negative connotations to them, research has shown that these brownfields are highly important for biodiversity as they are capable of harbouring rich and sophisticated ecosystems capable of supporting rare and threatened species.

While governments are starting to acknowledge the importance of brownfields and the role they play in protecting biodiversity, such as the UK government adding some brownfield sites to its list of priority sites listed in its Natural Environment and Rural Communities Act 2006 (NERC Act), many of these sites still face threats of development [2].

There are many types of brownfield sites, with the two most important broad categories being described as wetland or dry ground. Wetland brownfields are important as they provide refuge for waterbirds, whose natural habitat availability has been shrinking. Dry ground sites, are typically well-drained, poor in nutrients and sometimes contaminated and have been described by conservationists as highly important for providing havens for rare or endangered species [3].

Why are brownfields important for rural Ireland?

The expansion and intensification of agricultural practices have been closely linked to the depletion of biodiversity. It has been suggested that as much as 23% of species diversity once associated with European farmland has been lost during the period 1970 and 2000 [4]. It has become clear that biodiversity plays a fundamental role in sustainable agricultural systems. It has also been determined that increasing habitat heterogeneity in the rural landscape would play an important role in reversing the decline in farmland bird species. So if it has been agreed that more diverse landscapes in rural Ireland would benefit biodiversity and in turn would have a positive impact on agriculture, perhaps it would be beneficial to not only focus on increasing biodiversity on agricultural land but also factor in the importance of brownfield sites that have become widespread across Ireland since the 2010s when a surge in ghost estates, and in turn abandoned building sites, was seen in rural areas.

Of course, it’s important to stress the importance of protecting and promoting biodiversity on agricultural land, but maybe we shouldn’t ignore the potential biodiversity goldmines that we have potentially been casting scornful looks at for the past decade.

The brownfield site next door

At the beginning of the summer, I contacted Dr Marcus Collier and the Connecting Nature project about summer research opportunities and we got on the topic of the abandoned building site in my estate. We concluded that I had the opportunity to conduct research right on my doorstep. Once we worked through the logistics of the site location we came up with a plan. The plan for the research was to create a habitat map of the site, conduct botanical, invertebrate pollinator and bird surveys, and compare this to similar surveys conducted in a neighbouring agricultural field. This research aimed to bring attention to brownfield sites and to show that they can play an important role in conjunction with sustainable agricultural practices to increase the heterogeneity of the Irish rural landscape to protect and promote biodiversity.

ArcMap 10.7.1 was used to create the habitat map and habitats were classified according to Fossitt (2000) – A Guide to Habitats in Ireland. Once the map was completed, I decided that to get a complete picture of the brownfield site and the potential species it was home to, botanical surveys of multiple habitat types were required. Botanical surveys of grassland (GS2), hedgerows (WL1) and recolonising bare ground (ED3) were conducted. Transect sampling methods were used to record invertebrate and bird species. The same methods were used to study an improved agricultural grassland (GA1) directly beside the brownfield.

Habitat map of the site. Credit: Aoife Cahill

So on a few sunny days in June 2021, I went out into the field with a homemade quadrat, a camera, and a pen and paper to conduct this research.

What was found?

The results of the botanical surveys for each habitat type within the site were interesting because there was minimal overlapping in species types recorded in each habitat.      

Each habitat type had a distinct set of botanical species that weren’t found in the others. The recolonising bare ground was recorded to have the highest number of plant species. A survey of a neighbouring agricultural site showed very little diversity in plant species, with perennial ryegrass dominating the majority of the site. Several grass species were recorded in the brownfield site, including Yorkshire fog (H. lanatus) and sweet grass (H. odorata).

Number of plant species found at each habitat type. Credit: Aoife Cahill

The invertebrate pollinator survey also indicated the high biodiversity of the site, in which a range of bees, butterflies, and moths was recorded. Bees were the highest recorded species including the common carder (B. pascuorum), buff-tailed bumblebee (B. terrestris), and garden bumblebee (B. hortorum). Common blue (P. icarus), large white (P. brassicae), and small tortoiseshell (A. urticae) were the butterfly species identified. One micromoth species, Ancylis badiana, was also recorded. The bird species that were identified included Rooks, Wood pigeons, Starlings, Robins, and Magpies. 

Common carder bee (B. pascuorum) (on the left) and common blue butterfly (P. icarus) (on the right) found on-site. Credit: Aoife Cahill

What does it mean?

This field research is important because it could increase community awareness of how important the areas in towns and villages that are deemed to be “eyesores” could unknowingly be. It’s also important because it could be an indicator that brownfield sites could benefit the goal to increase biodiversity in the rural landscape by acting as a mosaic of different habitat types within one site located between large areas of agricultural land. While the main goal would remain to focus on protecting and promoting biodiversity on agricultural land as it makes up the majority of land use in Ireland (roughly 70%), brownfield sites could supplement the actions undertaken. Brownfield sites could benefit rare and endangered species by acting as a refuge when their natural habitats are becoming fewer and further between.

I believe that the potential benefit that brownfield sites could have to protect and promote biodiversity throughout Ireland should be given real consideration. While the land type could be deemed unorthodox, we live in a world that is changing every day and we must keep creating new ways and be open-minded to adapting to this change.

References

  1. https://link.springer.com/article/10.1007/s11355-011-0186-8
  2. https://www.legislation.gov.uk/ukpga/2006/16/pdfs/ukpga_20060016_en.pdf
  3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4264926/
  4. https://www.sciencedirect.com/science/article/abs/pii/S0264837716302125
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Interview with the Speakers of the 2021 Botany/Zoology Postgrad Symposium

Last month the Botany and Zoology departments at Trinity held their annual Postgraduate Symposium. Research students from both departments present a talk on recent and upcoming projects for their thesis, and the whole event is run by the students themselves. This is a big event for Botany/Zoology postgraduates not just because they get to show off their work and discoveries to the college community – it’s also great practice for future events, and students receive feedback on their presentations both from other postgraduates and from lecturers and professors in the two departments. Developing your ability to communicate your research is a crucial skill for all scientists. After all, what’s the point in discovering things about the natural world if you can’t share that knowledge!

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The socio-economic theory of animal abundance

Where do animals live and why? These are some of the questions that ecologists are interested in. Sure, we can talk about patterns of abundance in an area in terms of abiotic or biotic factors or niche variation. But what if there’s more to animals than that?

What if a young animal is concerned not just about eating, being eaten and living to reproduce but also with their finances, housing, commute and social mobility? What if a larger or older individual lives where they live not because they can outcompete smaller individuals for limited resources, but because they have accrued greater capital over time and thus have higher purchasing power?

None of these questions are answered by current ecological theory. We need an alternative explanation for animal distributions and abundances. Here, I present to you the socio-economic theory of animal abundance. I illustrate this theory using the Australian ghost crab (Ocypode cordimana) as a case study.

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Science and the English Language

“Most people who bother with the matter at all would admit that the English language is in a bad way, but it is generally assumed that we cannot by conscious action do anything about it.”

So George Orwell began his 1946 essay Politics and the English Language, which is still relevant today as both a guide and a warning. Reading it now (the whole thing is available online courtesy of the Orwell Foundation), it strikes me that the decline Orwell saw in the English language might be blamed on science as much as politics. Three of his “five specimens” of poor writing come from academia (one of them written by a prominent zoologist), and many of the specific writing habits he criticises are ones I see regularly in modern papers. One of our recent “NERD Club” discussion sessions was based on Orwell’s essay and related topics, as we looked for the conscious actions that might help us to write clearly and accurately.

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The 2020 EcoEvo Hall of Fame

At the start of each year we ask the EcoEvo contributors to share their favourite scientific publications from the past year and why they found them interesting, inspiring, or otherwise worthy of inclusion in the Hall of Fame. Keeping with tradition, here are the EcoEvo Hall of Fame entries for 2020! And if you enjoy reading about our favourite papers from 2020, remember you can also check out our favourites from 2017, 2018 and 2019, too!

Chosen by Andrew Neill

Read the full People and Nature paper here.

I really enjoyed this paper because it tackles a really difficult topic at the intersection of poverty, human rights, development, conservation, and sustainability. It is important to remember that conservation will never meet its objectives without considering how people depend on nature for their needs and livelihoods. The areas of richest biological diversity (and therefore conservation potential) are usually in developing countries with communities experiencing poverty. This paper collects responses from conservation practitioners to examine their viewpoints on poverty in the context of their work. 

F I G U R E 3. Comparison of discourses on five key dimensions of difference. Discourses are compared on a simple ordinal scale, and accordingly should only be interpreted in relative positions to one another (for instance, D3 is more ecocentric than D1).
© 2020 The Authors. People and Nature published by John Wiley & Sons Ltd on behalf of British Ecological Society. The article is distributed under the terms of the CC-BY 4 license.

They found some areas of agreement such as the poorest people should not be expected to shoulder the costs of preserving a global public good (the conservation of biodiversity). However, they also identify differences between responses: Is the focus placed on meeting the needs of people or more closely aligned with the “do no harm” principle? Is poverty a driver of nature’s decline, or is it the over-consumption that drives environmental degradation? This paper was a great opportunity to question my own views on these very complex ideas and to appreciate the wide diversity of thought going on across the world of conservation. 

Fisher, J.A., Dhungana, H., Duffy, J., He, J., Inturias, M., Lehmann, I., Martin, A., Mwayafu, D.M., Rodríguez, I. and Schneider, H. (2020). Conservationists’ perspectives on poverty: An empirical study. People and Nature, 2 (3), pp.678-692.

Chosen by Fionn Ó Marcaigh

Read the full Nature Communications paper here.

This paper is based on a truly colossal undertaking: to collect their data on dispersal ability, Sheard et al. measured the wings of 10,338 bird species, i.e. 99% of all bird species on Earth. They used the Hand-Wing Index, a measure that correlates with aspect ratio and basically tells you how long and pointed the bird’s wing is. The higher this number (i.e. the pointier the wing), the better the bird will be at dispersing and flying long distances.

a Diagram showing linear measurements used to calculate HWI taken on a standard museum study skin (secondary feathers shown in pale grey; primary feathers in dark grey). Wing length (Lw) is the distance from carpal joint to the tip of the longest primary feather; secondary length (S1) is the distance from carpal joint to the tip of the first secondary feather; Kipp’s distance (DK) is the difference between Lw and S1. b Open wing of a passerine bird showing how Lw and S1 are related to the wing’s span and width, and hence to its aspect ratio. c Because it is correlated with the aspect ratio, HWI is in theory positively associated with flight efficiency and key aspects of dispersal ability, including dispersal distance and gap-crossing ability.
© The Author(s) 2020. This article is distributed under the terms of the CC BY 4 license.

This is important for evolution, as the more birds that are able to fly between distant populations the more gene flow there will be and the less likely the populations are to diverge. Sheard et al. found important links between dispersal ability and geography and ecology, as tropical and territorial birds, had lower Hand-Wing Indices and migratory species had higher ones. It’s fascinating to see how these traits affect the ability of a species to move around, which in turn dictates where that species will be found in the world. The authors have made this incredible dataset freely available and it is sure to inform new insights into bird ecology and evolution for years to come.

Sheard C., Neate-Clegg M. H. C., Alioravainen N., Jones S. E. I., Vincent C., MacGregor H. E. A., Bregman T. P., Claramunt  S. & Tobias J. A. (2020) Ecological drivers of global gradients in avian dispersal inferred from wing morphology. Nature Communications, 11 (2463).

Chosen by Sam Ross

Read the full Science paper here.

The COVID-19 pandemic has been extremely challenging for many, so it was great to see some excellent science coming from the ‘natural experiment’ offered by COVID-19 movement restrictions. The authors show that during the COVID-19 restrictions anthropogenic noise (from vehicles etc.) in the San Francisco Bay Area reached a 70-year low, characteristic of the mid-1950s. They use a long-term dataset of White-Crowned Sparrow recordings to show that during the COVID-19 lockdown, when human noise pollution was minimal, Sparrows exploited the emptied acoustic space (usually occupied by human-related noise) by producing higher-performance songs at lower amplitudes, to maximise song distance. The authors highlight the rapidity with which behavioural traits (song characteristics) adapted to changes in human activity, suggesting incredible plasticity and potential resilience to pervasive anthropogenic pressures like noise pollution. To me, this study is a perfect example of nature’s resilience, and also on finding opportunity from tragedy (research made possible by a global pandemic).

Derryberry E.P., Phillips J.N., Derryberry G.E., Blum M.J., Luther D. (2020). Singing in a silent spring: Birds respond to a half-century soundscape reversion during the COVID-19 shutdown. Science, 370, 575-579.

Chosen by Jenny Bortoluzzi

Read the full Marine Policy paper here.

This paper looked at the human behavioural responses to a blanket ban on thresher shark fisheries in Sri Lanka and fisher’s perceptions of different aspects of the ban. A blanket ban means a complete prohibition on exploitation of a species, and Thresher sharks are considered to be the most vulnerable species of pelagic sharks. A blanket ban might therefore seem like a straightforward and easy conservation measure to protect them. But this study looked at the human impact behind such a drastic policy decision. A ban like this has consequences for the livelihoods of fishers – particularly smaller fishermen who rely highly on thresher shark landings to provide for their families. The study clearly shows the disparity in the impact this conservation policy has had between fishers who rely on these catches to survive and those for whom they are not the primary catch.

The biggest message I took from this paper is how important it is that human lives are taken into account when making conservation decisions; and more importantly that scientists and policymakers need to involve communities early on in the process, communicate better and work together, not against each other if we want conservation to be effective – and supported. This is a message I think more scientists need to hear and integrate into their work and one I hope to take forward in my future career.

Collins C., Letessier T. B., Broderick A., Wijesundara I., Nuno A. (2020). Using perceptions to examine human responses to blanket bans: The case of the thresher shark landing-ban in Sri Lanka. Marine Policy, 121 (104198).

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Sustainable redevelopment: visions of a post-lockdown world

Another sunrise brings another day of working from my hotel room. But today there’s a difference; the rain has eased and a smattering of sunshine dances on my balcony. I open my door and am struck by the fresh ocean breeze. It’s that fleeting time of year when Okinawa’s oppressive humidity is kept at bay by rain showers, producing occasional perfect days. I can practically taste the salt of the ocean as I watch the gentle lull of a distant fishing boat. But perhaps most noticeably, my ears prick up at the melodic and almost metallic cha-ko-lee of a pair of light-vented bulbuls (Pycnonotus sinensis) passing by. I watch the birds for a second before my eyes trail slowly back to the sea. Just as they do, I catch a flash of red. It must have been a ruddy kingfisher (Halcyon coromanda) darting from the tree it was perched in. A few minutes later my identification is confirmed as I hear the sweeping, descending call of the individual in question.

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Bees: common myths and misunderstandings

There are >20,000 different species of bee worldwide. They are a diverse group, encompassing the tiny 2mm long Perdita minima and the massive 38mm long Megachile pluto. They all* have one thing in common: their larvae feed on pollen from flowers. The protein in the pollen is necessary for larval growth and development, and thus for producing healthy adult bees. When visiting flowers to collect pollen and nectar to fuel flight, adult bees transfer that pollen from flower to flower, thus making them brilliant pollinators.

And bees are ever-increasing in popularity across many sectors including conservation, gardening, fashion, marketing, and public/corporate strategies. Their popularity means that there has been an increase into bee research, and lots of excellent conservation strategies (including our own All-Ireland Pollinator Plan), but it also means there has been a lot of mis-use of bees in corporate and even well-meaning conservation strategies (see Charlotte de Keyzer’s excellent “bee-washing” website). And as their popularity spreads, so does the amount of incorrect information about them, which makes an Melittologist (someone who studies bees), buzz with frustration…

So here’s a blog I’ve been meaning to write for some time** – six statements about bees that are often used, but aren’t true…

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