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Pavel Kratina

@kratina.bsky.social
2.1K followers 755 following 98 posts

Assoc Prof / Senior Lecturer in Ecology @Centre for Biodiversity and Sustainability, QMUL | #ecologicaltheory, #biodiversity, #climatewarming, #foodwebs, #globalchange, #freshwaters, #tropics. www.seresearch.qmul.ac.uk/cbs/peopl…

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Pavel Kratina @kratina.bsky.social · 22/09/2026
This week we moved to Atlantic Forest, sampling Rio Branco, close to Itanhaem, with @kiewerlek.bsky.social, @drdanperkins.bsky.social, @vssaito.bsky.social and his lab
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 22/09/2026
🌾 UKCEH's 3m Land Cover Map maps England in unprecedented detail, classifying 14bn+ 3m squares into 72 land cover & habitat types, from individual trees and hedgerows to buildings and solar arrays, supporting nature recovery. www.ceh.ac.uk/data/informa... www.ceh.ac.uk/press/showin... #LandUse
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American Museum of Natural History @amnh.org · 18/09/2026
Ever heard of the five-toed worm lizard (Bipes biporus)? This critter spends most of its time underground: Each of its forelimbs is equipped with five clawed digits that are used for digging. It can grow up to 8.3 in (21.1 cm) long. Photo: franfauna, CC BY-NC 4.0, iNaturalist
A photo of a five-toed worm lizard on a human hand. The animal somewhat resembles a worm, with pink skin, but has visible facial features and tiny arms.
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Proceedings of the National Academy of Sciences @pnas.org · 18/09/2026
How local is local adaptation? Researchers transplanted more than 700 lab-raised stickleback fish among lake and stream environments, finding that adaptation to specific sites can outweigh adaptation to broader habitat differences. In PNAS: ow.ly/yTOk50ZP97o
Two threespine stickleback fish. Image credit: Marius Roesti.
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Frank Melzner @frankmelzner.bsky.social · 18/09/2026
Our lab is hiring a long-term Postdoc in marine animal physiology (5 years). Great chance to work with us phenotyping mussels & to develop your own research program on questions of choice. Excellent lab and aquaristics facilities and easy access to European seas: jobs.univie.ac.at/job/Postdoc-...
jobs.univie.ac.at
Postdoc marine evolutionary physiology (University Assistant)
Postdoc marine evolutionary physiology (University Assistant)
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Pavel Kratina @kratina.bsky.social · 18/09/2026
I am delighted to see our third issue of Global Change Biology Communications live online: onlinelibrary.wiley.com/toc/30669200...
onlinelibrary.wiley.com
Global Change Biology Communications: Vol 1, No 3
Click on the title to browse this issue
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Pavel Kratina @kratina.bsky.social · 17/09/2026
Great team and some unexpected visitors
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Pavel Kratina @kratina.bsky.social · 17/09/2026
Successful sampling so far of streams and riparian communities for aquatic-terrestrial food web in Ribeirao Bonito, Brazil with @drdanperkins.bsky.social, @kiewerlek.bsky.social, @vssaito.bsky.social and others
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Pavel Kratina @kratina.bsky.social · 13/09/2026
Exciting to see our new paper about the overlooked #conservation values of #saline #lakes published in @natcomms.nature.com Check it out: rdcu.be/DwNCmA6WrVJa.
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Pavel Kratina @kratina.bsky.social · 12/09/2026
Lovely trip in Brazil so far with @kiewerlek.bsky.social @drdanperkins.bsky.social, Thursday presenting in Universidade Federal de São Carlos, Friday at Universidade Estadual Paulista - Rio Claro. Today and tomorrow visiting colleagues and friends at UNICAMP. Thanks for hosting @vssaito.bsky.social
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Dr Craig R McClain @drcraigmc.bsky.social · 31/08/2026
New in PNAS today: we projected how climate change will reshape the body size of marine life across the entire ocean. 23,329 mollusc species, every ocean basin. The headline everyone expects is "life shrinks." The real answer is far stranger. 🧪 #marinelife www.pnas.org/doi/10.1073/...
pnas.org
Nonuniform resizing of marine life under climate change | PNAS
Global warming is often predicted to drive universal declines in animal body size, but empirical evidence remains equivocal. This is particularly t...
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Neil @uk-wildlife.bsky.social · 31/08/2026
Dragonflies surviving the drought - a clip from my latest video on what happens when a pond dries out you can watch here: youtu.be/PBw40QZm67A #UKWildlife #Pondlife #insects #amphibians
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Rob Boyd @robboyd.bsky.social · 24/08/2026
What makes a multispecies abundance indicator "wrong", and what can be done to fix it? Read our new paper in Ecography to find out! @sacrevert.bsky.social @spakey.bsky.social @susanjarvis.bsky.social, Gary Powney and Xiao-Li Meng @uniexecec.bsky.social @ukceh.bsky.social doi.org/10.1002/ecog...
doi.org
How to reduce sampling error in species population monitoring: from theory to methods
Progress towards national and international targets to halt and reverse declines in species' abundances will be assessed using multispecies indicators (MSIs). A distinction must be drawn between two ...
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Frank Burdon @fburdon.bsky.social · 24/08/2026
This issue has emerged as another threat to the Arawa lakes with PFAs being found in Lake Rotorua. The close proximity of the airport to the lake has resulted in forever chemicals being detected - raising concerns about mahinga kai sourced from the lake.
stuff.co.nz
‘We cannot say it’s safe’: Forever chemicals found in Lake Rotorua
The discovery has prompted calls for more testing and raised concerns about the safety of food taken from the lake.
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Anthony Ricciardi @ecoinvasions.bsky.social · 12/08/2026
Worth repeating, in response to those who claim that the modern mass extinction event is overblown because many regions contain more species now than before. bsky.app/profile/ecoi...
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Prof. Stefan Rahmstorf @rahmstorf.bsky.social · 10/08/2026
Rivers across Europe are running low on water. The Rhine, Danube and Po are at historically low levels. The water crisis is being intensified by global warming driven by the burning of coal, oil and gas. www.dw.com/en/europes-r...
dw.com
Europe's rivers are drying up. Can they be saved?
The Rhine and Danube have reached historic lows. Dwindling water levels are affecting shipping, agriculture and ecosystems — and raising concerns about the future of drinking water supplies.
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Steve Thackeray @thackers.bsky.social · 06/08/2026
New study synthesises zooplankton data from 311 lakes in 37 countries! A great resource for freshwater ecology! See: aslopubs.onlinelibrary.wiley.com/doi/10.1002/... Great leadership Steph Figary, @rmpilla.bsky.social, @mishafredmeyer.bsky.social & @drplanktonguy.bsky.social! 🧪
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Katie O'Reilly @drkatfish.bsky.social · 06/08/2026
Summer mayfly swarms are a highly visible reminder of the progress made to improve the health of the #GreatLakes - even if it is sometimes gross to wake up to streets, cars, and everything else covered in a carpet of bugs www.statenews.org/section/the-...
statenews.org
Mayflies' return to Ohio isn't just a nuisance — it's a good sign for Lake Erie
An entire generation grew up without mayflies. But the pesky bug's return this summer points to a healthier Lake Erie .
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Frank Burdon @fburdon.bsky.social · 03/08/2026
What co-benefits do we gain when planting trees along stream margins? We don't fully know. Fully-funded PhD going now — mapping food webs across Mt Taranaki's "ring of restoration" 🌱🐟 Please repost among your networks Email: frank.burdon@waikato.ac.nz
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Florian Altermatt @florianaltermatt.bsky.social · 17/07/2026
I am #hiring! In my group 📍Universität Zürich | University of Zurich & Eawag I have #two open #Postdoc #Positions, with application deadlines in early August 2026. 🧬 🦐 🐠🌐🌍 Here a quick reminder & 🧵with all details, thanks for 🔄 redistributing to interested candidates.
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Pavel Kratina @kratina.bsky.social · 17/07/2026
New study, just published. Consequences -> Global #warming 🌞can alter feeding preferences 🐸, species #interactions and systematically alter entire #food #webs…
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Pavel Kratina @kratina.bsky.social · 05/07/2026
Have #natural #microcosms fulfilled the promise of #model systems? Read our new paper, with @srivastavalab.bsky.social, @ecolgonzalez.bsky.social, Nick Gotelli & others royalsocietypublishing.org/rstb/article...
royalsocietypublishing.org
Natural microcosms in ecology: fulfilling the promise of model systems?
Abstract. Natural microcosms (NMs) have been proposed as model systems for ecology based on their ubiquity, ease of study and natural context. We assess wh
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Katie O'Reilly @drkatfish.bsky.social · 02/07/2026
When it's 91-93°F me: dying Devils Hole pupfish: thriving
Devils Hole pupfish underwater
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Pavel Kratina @kratina.bsky.social · 02/07/2026
Important study -> More complex ecosystems, especially those with higher #diversity of #predators, function more effectively! Led by @barnesecodiv.bsky.social. Exciting to see this published in @nature.com. @qmulsbbs.bsky.social
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🍁 Alex Smith 🍁 @alexsmithants.bsky.social · 29/06/2026
🧪🧵 🪰 🐜🪲🐞🦗🐛🦋🪳🦟 How many species of insect are there?  A seemingly simple question, but one that has been 'bugging' scientists for years.  Our work out today suggests that there are millions more than we had previously expected.  doi.org/10.1073/pnas... @gdfcf.bsky.social
This photo was taken in Area de Conservacion GuanacasteThis microgastrine wasp was named by co-author Jose Fernandez-Triana in honour of Costa Rican parataxonomist Roberto Espinoza in recognition of his contribution to understanding the plant biology of ACG.  The species is Snellenius robertoespinozai.  The image is Creative Commons Attribution License (CC BY 4.0) so can reused provided the original author (Jose Fernandez-Triana) and the source are properly cited.  The source is: Fernandez-Triana JL, Whitfield JB, Smith MA, Kula RR, Hallwachs W, Janzen DH (2015) Revision of the genera Microplitis and Snellenius (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservacion Guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica. Deutsche Entomologische Zeitschrift 62(2): 137-201. https://doi.org/10.3897/dez.62.5276image of a Malaise trap in Area de Conservacion Guanacaste
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The New Yorker @newyorker.com · 30/06/2026
Today’s Daily Cartoon, by Lynn Hsu.
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David Ho @davidho.bsky.social · 30/06/2026
Globally, 84% of the heatwave days people were exposed to in 2020-24 would not have occurred without climate change. The rate of deaths associated with heat exposure increased by 23% from the 1990s, reaching 546,000 deaths annually. Look where people are dying. www.thelancet.com/journals/lan...
A figure containing two world maps stacked vertically, labeled "A" (top) and "B" (bottom). The entire image is captioned at the bottom: "Figure 2: Average percentage of total deaths that were heat-related in 1990–99 (A) and 2012–21 (B)".

A single color-coded legend on the left side applies to both maps, showing a gradient of 17 steps. The scale ranges from very pale cream/pink representing the lowest percentage ("0.00 to <0.25") to increasingly darker shades of orange, red, and finally dark maroon/black representing the highest percentage ("3.75 to 4.00"). Antarctica is shaded grey on both maps.

Map A (Top Map - 1990–99): Shows the global distribution of heat-related deaths as a percentage of total deaths during the 1990s. Most of North America, Europe, Asia, South America, and Australia are shaded in light cream or pale orange colors, indicating low percentages (generally below 1.00%). The highest percentages are concentrated in North Africa, parts of the Middle East, and parts of Central/Southern Africa, which are shaded in medium-to-dark red, with a couple of countries showing very dark maroon patches.

Map B (Bottom Map - 2012–21): Shows the same metric for the 2012–21 period. Compared to Map A, there is a visible and significant intensification of color globally, particularly across the African continent and the Middle East. A large, continuous block of countries across North Africa, West Africa, and the Middle East is now shaded in the darkest maroon and black tones, indicating that heat-related deaths make up the highest bracket of total deaths (up to 4.00%). Central and Southern Africa also display much darker shades of red and maroon compared to Map A, while South America (notably Argentina) and parts of South Asia show a slight darkening into deeper orange-red tones.
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Pavel Kratina @kratina.bsky.social · 30/06/2026
New study, just published in #Limnology and Oceanography Letters, shows how warming alters the trophic role of invasive consumers. Brilliantly lead by @varsharani.bsky.social 🌊!@qmulsbbs.bsky.social
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varsharani.bsky.social @varsharani.bsky.social · 30/06/2026
🌊 Our new paper is out now! What happens when an invasive omnivore gets warmer? We found that the mysid Limnomysis benedeni shifts toward a more ‘herbivorous’ diet. 🦐🌡️ More here: aslopubs.onlinelibrary.wiley.com/doi/10.1002/... @csabavad.bsky.social @zsofiahorvath.bsky.social @kratina.bsky.social
aslopubs.onlinelibrary.wiley.com
Temperature‐driven diet shift in an invasive omnivorous crustacean feeding on plankton
Global warming alters the physiology of ectotherm consumers, potentially making their diets more herbivorous. However, the relevance and generality of these changes remain poorly understood in a mult...
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Pavel Kratina @kratina.bsky.social · 27/06/2026
Urgent call for the Global Biodiversity Research Programme
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Brian J. Enquist @bjenquist.bsky.social · 26/06/2026
Four postdoc positions - Evolutionary Dynamics and Genomic Ecology (BCI EDGE)integrating population & evolutionary genomics, community ecology, metabolomics, & long-term forest dynamics to investigate the evolutionary processes maintaining tropical forest diversity stri.si.edu/story/bci-ev... 🧪 🌐 🌾
stri.si.edu
BCI Evolutionary Dynamics and Genomic Ecology project
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Royal Entomological Society @royentsoc.bsky.social · 25/06/2026
Want more #InsectPhotography? 📸 Check out the photos captured by the winners of last year's Photography Competition, featuring our #InsectWeek 2025 Over 18 Behaviour and Portrait winners. Enter this year's photography competition now! Check out the galleries 🔽 buff.ly/Xv8aiaN
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Nature Ecology & Evolution @natecoevo.nature.com · 24/06/2026
Using eDNA from 113 river systems, this study presents a unified analysis of global riverine fish biodiversity to examine how effectively eDNA captures multiple facets of biodiversity and how it responds to variation in drainage properties and human activities 🧪 www.nature.com/articles/s41...
nature.com
A unified analysis of global riverine eDNA reveals common associations of fish biodiversity with drainage characteristics - Nature Ecology & Evolution
Using environmental DNA from 113 river systems, this study presents a unified analysis of global riverine fish biodiversity to examine how effectively environmental DNA captures multiple facets of bio...
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Jonathan Losos @jblosos.bsky.social · 21/06/2026
Robert Ricklefs - in memoriam dynamicecology.wordpress.com/2026/06/11/r...
dynamicecology.wordpress.com
Robert Ricklefs – in memoriam
Robert Ricklefs, a giant of ecology, passed away on Sunday. It is hard to overstate the extensive impact Bob had on the field. He was elected a member of the National Academy of Sciences in the US,…
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Brian J. Enquist @bjenquist.bsky.social · 19/06/2026
Biotic interactions biogeography: A framework for understanding how species interactions shape biodiversity patterns across scales 🧪🌐https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3003813
journals.plos.org
Biotic interactions biogeography: A framework for understanding how species interactions shape biodiversity patterns across scales
Biogeography and ecology have long developed in parallel. This Essay explores how new data on species interactions across large scales now allow their integration, opening fresh insights into how biod...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 19/06/2026
New analysis examines how deforestation in the Amazon affects rainfall and forest stability. Changes to the land surface may feedback strongly on atmospheric exchanges, affecting rainfall conditions in other locations. The study identifies key hotspots of vulnerability. 🧪 1/
Six maps of Amazon region showing Conservation and Restoration hotspots. (a–c) Spatial distribution of the cumulative Threat generated by the deforestation of each individual grid cell, shown for each precipitation indicator (MAP, DSL, MCWD). (d–f) Spatial distribution of the reduction in Threat resulting from the restoration of each grid cell. Brighter colors in (a–c) indicate areas where deforestation produces stronger negative impacts on downwind forest stability, while darker colors in (d–f) indicate areas where restoration leads to greater improvements in downwind forest stability.
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Pavel Kratina @kratina.bsky.social · 17/06/2026
It was a great pleasure to visit University of Palermo, and other institutions - such a lovely crowd and engaging discussions. And super exciting to visit the pond that inspired Hutchinson to write his foundational paper Homage to Santa Rosalia🤩
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Miguel Bastos Araújo, PhD @miguelbaraujo.bsky.social · 16/06/2026
@plosbiology.org - The integration of biogeography and ecology has been limited. The emergence of new methods and high-quality ecological network data at biogeographical scales promote deeper integration of biogeography and ecology. @mncn-csic.bsky.social journals.plos.org/plosbiology/...
journals.plos.org
Biotic interactions biogeography: A framework for understanding how species interactions shape biodiversity patterns across scales
Biogeography and ecology have long developed in parallel. This Essay explores how new data on species interactions across large scales now allow their integration, opening fresh insights into how biod...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 31/05/2026
We're pleased to partner on the new Good Vibrations project. This will combine eco-acoustics with environmental DNA analyses to provide detailed insights into how river biodiversity responds to pollution and climate change. waterinnovation.challenges.org/news… 🧪
waterinnovation.challenges.org
Fungi that filter water, 3D-printed infrastructure, and river life monitors win the sixth Water Breakthrough Challenge - Water Innovation Fund
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Nature Ecology & Evolution @natecoevo.nature.com · 29/05/2026
ICYMI: Lage-scale analysis shows the importance of freshwater insects such as mayflies, stoneflies and caddisflies for riparian avian communities www.nature.com/articles/s41...
nature.com
Cross-ecosystem linkages between freshwater insects and riparian birds across the USA - Nature Ecology & Evolution
Aquatic insects such as mayflies, stoneflies and caddisflies are widely used for freshwater biomonitoring and could provide resource pulses to terrestrial insectivores. Here the authors show a positiv...
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Pavel Kratina @kratina.bsky.social · 23/05/2026
Another highlight of our field trip to Croatia was this dice snake, Natrix tessellata, devouring a sunfish 🐟🐍 in #Krka National Park 👇
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Pavel Kratina @kratina.bsky.social · 16/05/2026
Just published in Limnology and Oceanography Letters: our new study shows how American #manatees adjust their #diet along the Brazilian coast. With Camila Carvalho, @emmadeeks.bsky.social and others. aslopubs.onlinelibrary.wiley.com/doi/full/10....
aslopubs.onlinelibrary.wiley.com
American manatees adjust their diet composition and trophic niche breadth across different coastal regions
Marine mammals can exhibit high plasticity in foraging strategies, but how such plasticity is driven by environmental conditions is poorly understood. The American manatee (Trichechus manatus), a lar...
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Pavel Kratina @kratina.bsky.social · 14/05/2026
Another exciting field trip to Croatia that we have been running for our @qmulsbbs.bsky.social students since 2014. Many thanks to Clara, Mengdi and the Croatian team! See you next year!
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Pavel Kratina @kratina.bsky.social · 14/05/2026
Looking for a candidate for an MSCA Postdoctoral Fellowship 2026 to work with my group at QMUL on climate warming, freshwater ecosystems, ecological networks, trophic plasticity, etc. www.qmul.ac.uk/geog/researc... DM me if you are interested!
qmul.ac.uk
Marie Skłodowska-Curie Postdoctoral Fellowships 2026 - School of Society and Environment – Department of Geography and Environmental Science
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Doctora Malka Older @older.bsky.social · 13/05/2026
people all over the world are working to protect their environment, like these groups in Cuba. This month @globalvoices.org is bringing you stories of environmental defenders, brilliant solutions, committed local action, in our climate action Spotlight: globalvoices.org/special/posi...
globalvoices.org
Who is defending Cuba’s threatened species?
Cuba hosts some of the world’s richest biodiversity but faces the impacts of climate change, human activity and weak protections. Scientists and activists strive to preserve endangered wildlife and ec...
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Steve Thackeray @thackers.bsky.social · 08/05/2026
A beautiful mayfly #UKwildlife
A golden brown mayfly perched on a wooden fence
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explore.org @explore.org · 04/05/2026
Manatee Meditation.
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Scientific American @sciam.bsky.social · 15/04/2026
Biologists are racing to save America’s freshwater mussels—the water-filtering keystone species that once filled the country’s rivers and streams—from extinction
scientificamerican.com
The baffling ecological disaster that’s killing America’s freshwater mussels
Biologists are racing to save America’s freshwater mussels—the water-filtering keystone species that once filled the country’s rivers and streams—from extinction
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The Oxford Nature Network @biodivoxford.bsky.social · 08/04/2026
This free event will be full of interesting talks, films, beautiful images, music, and exhibits. Reserve your ticket before they are all gone! oumnh.ox.ac.uk/event/how-to...
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ron-kichurchak.bsky.social @ron-kichurchak.bsky.social · 06/04/2026
Duck-billed tree frog endemic to Mexico
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