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Isaac Pesca

@isaacpesca.bsky.social
33 followers 59 following 19 posts

My research focuses on understanding how biodiversity changes in space and time and how disturbances, such as global fisheries and climate change, affect those patterns.

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Reposted by Isaac Pesca
Stephen King @stephenking.bsky.social · 29/09/2026
Reading has become an endangered species. Which is half the problem with American political life. Maybe more than half. If you can't read, you can't think. Then you can fall for anything. The idea, for instance, that the truth is fake news.
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Isaac Pesca @isaacpesca.bsky.social · 19/09/2026
Spinning this masterpiece today—such well-crafted atmospheric soundscapes always bring me to different places. Thanks for your music, Mr. Ayloss! Spectral Lore - Gnosis. @infinitedreamscape.bsky.social
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Reposted by Isaac Pesca
Seth Finnegan @sethf.bsky.social · 13/09/2026
Everyone had their own weird way of coping with the pandemic, and mine was photographing nudibranchs on the California coast. Fun to have been able to parlay that into a PNAS cover, and to have been part of such interesting work led by @isaacpesca.bsky.social & @drcraigmc.bsky.social! #nudibranch
A close-up of an aeolid nudibranch sea slug, Phidiana hiltoni, on a piece of kelp. The slug is translucent white with orange-banded rhinophores and gray cerata with pale orange tips.
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Proceedings of the National Academy of Sciences @pnas.org · 11/09/2026
In this issue: Uncovering illegal wildlife trade routes, reconstructing the Jurassic forest soundscape, and exploring the neurobiology of how mice play follow the leader. In PNAS: ow.ly/jrS550ZM4rU
Pictured is the nudibranch Phidiana hiltoni, which is found on the California coast.
Image credit: Seth Finnegan.
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Dr Craig R McClain @drcraigmc.bsky.social · 08/09/2026
When your postdoc @isaacpesca.bsky.social is so awesome they give him the cover of PNAS! Excellent photo by @sethf.bsky.social! And excellent coauthors of @pedromonarrez.bsky.social @tomjwebb.bsky.social among others.
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iDiv Biodiversity Research @idiv-research.bsky.social · 07/09/2026
Reptiles are among the most misunderstood animals on the planet. 🐢 As Shai Meiri puts it in conversation with iDiv's Volker Hahn, they are fascinating and largely not harmful.🦎 Learn more on #InsideBiodiversity: insidebiodiversity.podigee.io @telavivuni.bsky.social @unimelb.edu.au
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Elle Cordova @ellecordova.bsky.social · 03/09/2026
Rough Draft vs Final Draft
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Dr. Or M. Bialik |📚|🔬|🌊|⚒️ @obialik.bsky.social · 04/09/2026
Climate change affects the physiology of animals in different ways. Many shrink, but some grow, and the change can also depend on where the animal lives. 🧪 Link: doi.org/10.1073/pnas.2606099123​
Change in standardized body size slopes for different invertebrates for low vs high emission scenarios
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Proceedings of the National Academy of Sciences @pnas.org · 04/09/2026
As the climate changes, some mollusks will shrink to half their current size, while others will grow up to 15% larger, depending on lineage and location. The ecological and social consequences for marine ecosystems could be profound. In PNAS: ow.ly/iUo450ZJsTl
McDonald's dorid, a California nudibranch representing the molluscan diversity examined in this study.
CREDIT: Seth Finnegan.
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Dr Craig R McClain @drcraigmc.bsky.social · 31/08/2026
Huge congratulations to lead author Isaac Trindade-Santos, and to coauthors Tom Webb, Noel Heim, and the team. Built on the MOBS database and OBIS. Open access, all code and data public. 🧪 #HowToBuildAGiant #marinelife Paper: doi.org/10.1073/pnas...
doi.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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Reposted by Isaac Pesca
Dr Craig R McClain @drcraigmc.bsky.social · 31/08/2026
It matters beyond size. Shifts in the size structure of ocean life ripple into carbon storage, nutrient cycling, and the seafood billions of people depend on. And the gap between low and high emissions is enormous, so the scale of this is still ours to decide. 🧪 #marinelife
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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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Isaac Pesca @isaacpesca.bsky.social · 22/08/2026
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Dr Craig R McClain @drcraigmc.bsky.social · 20/08/2026
My university wrote up our new $2M NSF project, and I got to say the thing I believe: the deep sea isn't empty, it's just unread. We're using DNA to read it at a resolution nobody has tried, sampling the abyssal plain to find who really lives there. 🧪 #marinelife louisiana.edu/news/ul-lafa...
louisiana.edu
UL Lafayette biologist receives NSF award to investigate deep-sea biodiversity
How far do deep-sea species range, and how many remain undiscovered?
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Dr Craig R McClain @drcraigmc.bsky.social · 27/07/2026
Coast redwoods top 100 meters, and at that height pulling water up from the roots nearly fails. Their fix: absorb fog straight through their needles. That is why they only grow in California's coastal fog belt. The tallest trees on Earth cheat physics with fog. 🧪 #HowToBuildAGiant #plants
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D. C. Fitzgerald @dcfitzgerald.bsky.social · 25/04/2026
Scaly-foot Snail, volcano snail Chrysomallon squamiferum)…the outer layer is composed of iron sulfides & the foot is protected by iron-plated scales…one of the most resilient and biologically unique creatures on earth. #wildlife #nature #photo #biology
This is a small deep-sea snail that looks like it is wearing a suit of dark, metallic armor. Its shell and the soft "foot" underneath are covered in overlapping, jagged scales made of iron minerals, giving it a rough, chainmail-like texture. It lives in the pitch-black darkness of the ocean floor next to volcanic vents, appearing like a tiny, armored tank surviving in a world of extreme heat and toxic chemicals
To
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iDiv Biodiversity Research @idiv-research.bsky.social · 07/04/2026
Insects are diverse, adaptable, remarkable. 🪲
 But researchers face a challenge: the period of systematic monitoring reflects human influence and the true baseline is unknown. On #InsideBiodiversity, @roelvanklink.bsky.social shares what long‑term data reveals.
 🎧 insidebiodiversity.podigee.io
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Isaac Pesca @isaacpesca.bsky.social · 04/03/2026
Samba Day is a Soul Recharging Day! Brazilian Culture in Lafayette, Louisiana.
Samba Day is a Soul Recharging Day! Brazilian Culture in Lafayette, Louisiana!
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Isaac Pesca @isaacpesca.bsky.social · 28/02/2026
Mantella baroni
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Isaac Pesca @isaacpesca.bsky.social · 18/01/2026
Belo Horizonte, Salvador, Lafayette
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Isaac Pesca @isaacpesca.bsky.social · 31/12/2025
Bayou Sojourner Dwellers
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BES Macro @besmacro.bsky.social · 16/12/2025
Meet the #BES2025 SIGs on floor -1! We’ll be heading to our social at Frankenstein later too! Come say hi to some of our committee: @inesismartins.bsky.social @bethanyjallen.bsky.social @lauraloubio.bsky.social
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iDiv Biodiversity Research @idiv-research.bsky.social · 13/11/2025
Planetary boundaries are not always protective. Guest Helmut Hillebrand warns that setting limits can lead to their full exploitation. 💬 “Having a boundary… will always lead to the complete use of that space.” 🎧 Hear more on #InsideBiodiversity: insidebiodiversity.podigee.io
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Royal Society Publishing @royalsocietypublishing.org · 11/11/2025
The hidden biodiversity knowledge split in biological collections #ProcB #BiologicalSciencePractices #OpenAccess royalsocietypublishing.org/doi/10.1098/...
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Isaac Pesca @isaacpesca.bsky.social · 20/10/2025
Koharu, my favorite bat species ❤️🦇
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iDiv Biodiversity Research @idiv-research.bsky.social · 15/10/2025
💬This month @smartenwinter.bsky.social joins idiv's #InsideBiodiversity to explore how non-native species challenge assumptions about nature, balance, and biodiversity. Dive into the grey areas of conservation, where values, data, and definitions collide. 🎧 Listen now: insidebiodiversity.podigee.io
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Nature Portfolio @natureportfolio.nature.com · 21/09/2025
“Many scholars from historically overexploited countries (often referred to as the global south) expected that exposing the problem would trigger change. Four years on, I see it clearly: the scientific system was never designed for equity,” writes Dolors Armenteras in Nature. #Academicsky 🧪
go.nature.com
Equity in science is a beautiful lie — and I’m done pretending
Science isn’t really moving towards equity; institutions are just perfecting the appearance of equity. We need to build an alternative system.
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Nature Portfolio @natureportfolio.nature.com · 20/09/2025
A study in Nature Climate Change shows that the ocean carbon sink unexpectedly declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics. 🌊 🧪
go.nature.com
Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change
The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics.
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Nature Portfolio @natureportfolio.nature.com · 18/09/2025
A Nature Careers feature explores the ways scientific societies, journals, editors and researchers are pushing back against mean-spirited peer reviews. #Academicsky 🧪
go.nature.com
‘Lipstick on a pig’: how to fight back against a peer-review bully
Scientific societies, journals, editors and researchers are pushing back against mean-spirited peer reviews.
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Milan Chytrý @milanchytry.bsky.social · 05/09/2025
In our new Nature Communications article led by Rashmi Paudel, we show that plant species that spread within their native range have a higher probability of becoming established outside their native range. 🔗https://doi.org/10.1038/s41467-025-63293-6 🔗Sharable PDF link: rdcu.be/eEmQr
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Isaac Pesca @isaacpesca.bsky.social · 04/09/2025
A tree diving in the blue sky seeking for the moon's light... #photography #moon #madrugada #luzdalua #moon #lua #hobby #nature #sky
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Isaac Pesca @isaacpesca.bsky.social · 28/08/2025
Ocaso.
Ocaso.
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Isaac Pesca @isaacpesca.bsky.social · 25/07/2025
Moqueca!
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Joaquín Hortal @jhortal.bsky.social · 15/07/2025
Taxonomy is under constant change; species classification is revised continuously, and changes accumulate affecting biodiversity metrics & generating uncertainty that is rarely assessed. Juliana Stropp review how taxonomic changes have changed the observed Amazonian palm richness patterns 👇🧪🌐 #NICED
doi.org
The impact of taxonomic change on the Amazonian palm flora | Proceedings of the Royal Society B: Biological Sciences
Although taxonomy is an evolving discipline, taxonomic change is rarely accounted for in macroecological studies. By tracking the history of species descriptions and synonymizations of Amazonian palms...
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Dr Craig R McClain @drcraigmc.bsky.social · 24/06/2025
I've wanted to write this article for years. About my and other's struggles to even survive sometime in #academia. Thank you to the amazing editors at @plosbiology.org that gave me the forum to write this piece. #science
journals.plos.org
Too poor to science: How wealth determines who succeeds in STEM
From student to researcher, a career in science can come with a high price tag. This Perspective explores how persistent financial barriers limit who can succeed in science, revealing how wealth shape...
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iDiv Biodiversity Research @idiv-research.bsky.social · 25/06/2025
🌀Turnover vs. Loss — local biodiversity isn't declining as expected. 🔄 Some species disappear, others appear — so does overall richness change? 🧐 In this #InsideBiodiversity episode, @jon-chase03.bsky.social explains why reality is challenging assumptions. 🔗https://insidebiodiversity.podigee.io/
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Isaac Pesca @isaacpesca.bsky.social · 24/06/2025
"Using a simulation approach, we asked how disturbances might have affected regional patterns of β-diversity, following the ‘Mariana disaster’ at the Bento Rodrigues dam in the Doce River Basin." www.sciencedirect.com/science/arti...
sciencedirect.com
Simulating shifts in taxonomic and functional β-diversity of ray-finned fishes: Probing the Mariana disaster
Environmental catastrophes may precipitate local species extinctions, hence altering community composition (i.e., β-diversity) at the regional scale. …
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tomjwebb @tomjwebb.bsky.social · 06/06/2025
A bit of Friday fun: I matched the 85K marine species in our new MOBS database to 65M occurrence records in @obis.org and mapped them. Here's where we now have at least some information about the size of marine species - i.e., more or less everywhere! (cc @drcraigmc.bsky.social)
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Dr Craig R McClain @drcraigmc.bsky.social · 05/06/2025
🧵New paper + open database drop! The Marine Organismal Body Size ( #MOBS ) Database is now live—85,000+ marine species, from plankton to whales, with standardized size data. A huge leap for biodiversity, conservation, and climate science. #science #marinelife onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
MOBS 1.0: A Database of Interspecific Variation in Marine Organismal Body Sizes
Motivation Body size is a fundamental trait influencing an organism's life history, ecology, physiology and evolutionary dynamics. While extensive body-size databases exist for terrestrial vertebrat...
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Isaac Pesca @isaacpesca.bsky.social · 05/05/2025
What happened when the first inhabitants from South America did meet Africans? The best cuisine of the planet was created! This is a traditional dish in Northeast Brazil: "Moqueca"!
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IPBES @ipbes.net · 21/04/2025
A big congratulations to one of the co-Chairs of the @ipbes.net #GlobalAssessment, Sandra Díaz, for being named one of Time Magazine’s 100 most influential people of 2025! 🌍🧪 Read more: time.com/collections/...
time.com
Sandra Díaz: The 100 Most Influential People of 2025
Find out why Sandra Díaz is on this year’s list
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Laura Antao @lauraantao.bsky.social · 28/02/2025
📢New paper!! 📢using #BioTIME #timeseries we showed that faster rates of #turnover in community composition were associated with faster rates of #temperature #change across biomes, for both cooling & warming + microclimate availability & human impacts modulate these responses go.nature.com/3WD7cWa
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iDiv Biodiversity Research @idiv-research.bsky.social · 15/04/2025
We see changes in species identities almost everywhere we look, but not always in species numbers. 📊 In episode one of #InsideBiodiversity, we talk to Maria Dornelas about how biodiversity is changing 🐠 The story is more complex than we often think. Listen now: insidebiodiversity.podigee.io
Inside Biodiversity episode cover: Is Biodiversity Declining Everywhere? With guest: Maria Dornelas
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Royal Society Publishing @royalsocietypublishing.org · 04/04/2025
A 125 million-year-old freshwater isopod shines new light on the origin of subterranean freshwater species: royalsocietypublishing.org/doi/10.1098/... #RSOS #FossilFriday #palaeontology
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Isaac Pesca @isaacpesca.bsky.social · 04/04/2025
How much functional diversity global fisheries has been exploiting from the Large Marine Ecosystems of the world in the last half century? Find the answer in our paper: royalsocietypublishing.org/doi/10.1098/...
royalsocietypublishing.org
Global change in the functional diversity of marine fisheries exploitation over the past 65 years | Proceedings of the Royal Society B: Biological Sciences
Overexploitation is recognized as one of the main threats to global biodiversity. Here, we report a widespread change in the functional diversity of fisheries catches from the large marine ecosystems ...
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iDiv Biodiversity Research @idiv-research.bsky.social · 03/04/2025
🎧The wait is over! It’s time to listen and explore the complexities of biodiversity in the new #InsideBiodiversity podcast hosted by #iDiv. Episode one, with guest Maria Dornelas, speaking with Volker Hahn, drops today — listen now wherever you get your podcasts! 🦜Learn more: www.idiv.de/new-podcast
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