Juan Carvajal-Quintero

🌊Taxonomic, phylogenetic, and functional β-diversity and its components respond distinctly to nutrients and herbivory in algae. New functional β-diversity metrics, outperforming the conventional ones, will benefit the biodiversity field👇
buff.ly/3pfult9

🦭 New study reveals overlooked intraspecific variation in prey quality and its influence on predator energy budgets. By identifying key ecological drivers, they emphasize the need to integrate such variability into bioenergetic models.

Read the full paper here! ➡️ buff.ly/vecdcwH

Si están o andarán por Medellín, Colombia, están invitadxs a esta charla en la Universidad de Antioquia en el marco del primer curso de Macroecología para el posgrado de Biología de la UdeA.

Si conoces a algun/a interesadx, avísale!

Society for Freshwater Science (SFS) 2026 Annual Meeting Spokane, WA May 17-21 logo featuring a mountains, a waterfall, and a bridge in the background and salmon and aquatic insects in the foreground. Around the edge is the meeting theme: Gathering to build resilient watersheds and communities

💡We’re now accepting workshop & special session proposals for the Society for Freshwater Science 2026 Annual Meeting.

📍 Spokane, WA
📆 May 17–21, 2026
📝 Proposals due Oct 15, 2025

🔗 Special sessions: www.sfsannualmeeting.org/special-sess...

🔗 Workshops: www.sfsannualmeeting.org/workshop-pro...

🇨🇴 at the Living the data symposium at #CSEE2025
@crcruzr.bsky.social @juancarvq.bsky.social

Go check out @jacejostles.bsky.social 's very pretty poster this evening about the science behind guppy magic and science communication. Spot I1 #evol2025

Organizer/Organisateur: Andrea Paz (@andreapaz.bsky.social), Juan Carvajal-Quintero (@juancarvq.bsky.social), Tim Parker, Timothee Poisot (@ctrlalttim.com), Diane Srivastava (@srivastavalab.bsky.social), Cristian Alexander Cruz Rodriguez & Bruno Soares (@bruno-soares.bsky.social)

Lead by my friend @gabrielmoulatlet.bsky.social and with the artistic contribution of our very own Roberto Ruiz (IG: @rob_rz), following the tradition of classic AmNat papers 🫶

Thanks to our other friends and colleagues Wesley Dáttilo and Daniel Kissling for the collab

Thanks to @idiv for funding and hosting our first working group meeting on range edge dynamics (sRED) @kemarshall.bsky.social @joeybernhardt.bsky.social @juancarvq.bsky.social @shaharchaikin.bsky.social @usuitakuji.bsky.social @emmamarjakangas.bsky.social @colingarroway.bsky.social

Authors of iDiv paper awarded W.S. Cooper Award ESA’s 2025 Cooper Award Honors Groundbreaking Work on Taxonomic Harmonization in Biodiversity Research

The 2025 Cooper Award @ecologicalsociety.bsky.social has been awarded to the authors of “Harmonizing taxon names in biodiversity data: A review of tools, databases and best practices”.
Congratulations to Matthias Grenié, @smartenwinter.bsky.social & all co-authors! 🥂🎉
www.idiv.de/cooper-award...

I’m recruiting a PhD student in macrogenetics at Dalhousie University 🇨🇦! Focus will be on the biogeography of vertebrate genetic diversity or urban evolutionary ecology.
Full ad: www.schmidt-biodiversity-lab.org/macrogenetic...
If the ad is up, applications are still open.
Please share widely! 🧬🧬

This photograph of Gale crater, Mars, was taken by the Curiosity rover at the Ubajara drill site. The rover’s 40-cm-wide tracks are visible in the foreground. The rover drilled a rock sample at this location, which was found to contain substantial amounts of siderite, an iron carbonate mineral. The siderite likely played a role in an ancient carbon cycle that affected Mars’ surface climate.

NASA’s Curiosity rover has uncovered a hidden chemical archive of ancient Mars’ atmosphere, which suggests that large amounts of carbon dioxide have been locked into the planet’s crust, according to a new Science study.

Learn more in this week's issue: scim.ag/3Ed9kOl

Signs of life on a distant planet? Not so fast, say these astronomers Bold claims of ‘biosignature’ molecules trigger an outpouring of scepticism.

A team of scientists made headlines last night with claims that they had found the “strongest hints yet of biological activity outside the Solar System”. They have met floods of scepticism.

https://go.nature.com/3Gsyr03

Global Projection of Terrestrial Vertebrate Food Webs Under Future Climate and Land‐Use Changes

📄 https://buff.ly/4gwQYVF
#foodweb #climatewarming #landusechange #biodiversity

The position will be based at Dalhousie University. Please share widely!!
@csee-scee.bsky.social
@ciee-icee.bsky.social
@biogeography.bsky.social

PhD Advertisement that reads: I am recruiting a PhD student to join MacroSize, a new international research network advancing hypotheses and theories on intraspecific body size variability in fish. The selected candidate will co-develop the project, analyze large datasets, and collaborate closely with MacroSize members, including co-leads Pablo Tedesco, Ignasi Arranz, Xingli Giam, and Juan Carvajal-Quintero. To apply, Send your CV and a motivation letter to juan.carvajal@dal.ca. Applications are open now and will be reviewed on a rolling basis. Start date September 2025 (flexible).

PhD project alert! 🚨 I'm recruiting a PhD student to join my lab and the MacroSize network to investigate the trends, patterns, and processes driving intraspecific variation in fish body size in the Anthropocene. Exciting opportunity to explore ecological dynamics in a changing world! :) 🌎🐟🐠🐡

Cool paper showing how deforestation impacts freshwater fish communities and a nice example on connectivity between blue-green biodiversity!

One quarter of freshwater animals at risk of extinction - IUCN Red List Gland, Switzerland, 8 January 2025 (IUCN) – The largest global assessment of freshwater animals on the IUCN Red List of Threatened Species™ to date has revealed that 24% of the world’s freshwater fish...

‘One quarter of freshwater animals at risk of extinction’ iucn.org/press-releas...

One-quarter of freshwater fauna threatened with extinction - Nature A global multi-taxon extinction risk assessment of freshwater fauna for The IUCN Red List of Threatened Species finds one-quarter of species to be at high risk of extinction.

One-quarter of freshwater fauna threatened with extinction | Nature

Illuminating the multidimensional contributions of small-scale fisheries - Nature A study aimed at revealing the role of small-scale fisheries in sustainable development shows they provide at least 40% of the global fishing catch and affect the livelihoods of 1 in 12 people in the ...

Small-scale fisheries account for 40% of global catch, providing 20% of micronutrient intakes for up to 2.3 billion people and livelihoods for 1 in 12 people.

Huge effort involving @fao.org & 800 experts, out now in @nature.com

www.nature.com/articles/s41...

Three must read papers for PhD students. #scisky #PhD #science #research #academicsky

1. The importance of stupidity in scientific research

Open Access
journals.biologists.com/jcs/article/...

Jumping salmon.

A study of 632 freshwater fish species from 9,989 locations finds climate warming affects fish abundances, with increases at the poleward edges of species’ distributions and declines at the equatorward edges of species’ distributions. In PNAS: www.pnas.org/doi/10.1073/...

More flow upstream and less flow downstream: The changing form and function of global rivers We mapped daily streamflow from 1984 to 2018 in approximately 2.9 million rivers to assess recent changes to global river systems. We found that river outlets were dominated by significant decreases i...

Wild #river news—a global survey looking at 3 million rivers over the past 35 years shows the annual flow of water dropped in 44% of the world’s largest downstream rivers while many headwater streams grew. The impact on everything from sediment to irrigation are vast

www.science.org/doi/10.1126/...

6th day of Fishmas already! Here's a beautiful but unflatteringly named candy cane fish: the Warteye stargazer (Gillellus uranidea). These tiny fellas get up to about 4cm (on a good day) and carry their eggs tucked behind their pectoral fin – yup, you heard that right: they're armpit brooders... 🤏🐠🧪

A picture of the earth showing the pacific ocean. You can see hawaii and New Zealand. Also the edge of antarctica, australia, and north and south america...but barely.

It’s interesting that the emojis show the earth from three angles 🌎 🌍 🌏 but not the fourth.

Though 🔵 is a fair approximation of what it would look like.

People underestimate the Pacific.

Feeding traces from bite marks and bromalites.

First, we've discovered the conventional fossil record. Then there was a time for trace fossils. And now even more exotic records reveal the ancient life:
Coprolites, cololites and regurgitalites point to the roots of dinosaur supremacy

www.nature.com/articles/s41...
🧪 #Paleobio ⚒️ #Geology #EvoBio

Starting up and Aquatic Science Pack! go.bsky.app/Lf9iN2C

FreshLanDiv: A Global Database of Freshwater Biodiversity Across Different Land Uses Motivation Freshwater ecosystems have been heavily impacted by land-use changes, but data syntheses on these impacts are still limited. Here, we compiled a global database encompassing 241 studies w.....

FreshLanDiv: A Global Database of Freshwater Biodiversity Across Different Land Uses 🌎 🧪

onlinelibrary.wiley.com/doi/full/10....

Hydropower impacts on riverine biodiversity Nature Reviews Earth & Environment - Hydropower is a renewable energy source that can contribute to growing energy demands. This Review considers the ecological consequences of hydropower...

Hydropower impacts on riverine #biodiversity🐟🏞️- check our review in Nature Reviews Earth & Environment free-to-read rdcu.be/dXhZ2, led by @fengzhihe.bsky.social #freshwater #damremoval #hydropower #river #greenenergy #energy