Christopher J. Sullivan, PhD
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sullivan-fisheries.bsky.social
Christopher J. Sullivan, PhD
@sullivan-fisheries.bsky.social
Assistant USGS Coop Unit Leader and Assistant Professor at Cornell University | https://sullivanfishlab.weebly.com/
Individual-based models reveal thermal refuges insufficient for brown trout survival during extreme heat events, predicting up to 86% mortality despite refuge availability. New paper!
besjournals.onlinelibrary.wiley.com/doi/10.1111/...
Warming riverscapes annually challenge the role of thermal refuges for thermoregulating salmonids
While our model assumes static thermal refuge conditions due to data limitations, our findings highlight the limits of riverscape thermal refuges as a conservation tool under intensifying climatic co...
besjournals.onlinelibrary.wiley.com
August 25, 2025 at 12:31 PM
Reposted by Christopher J. Sullivan, PhD
💧 Hidden life in groundwater

Underground microbes react differently to climate extremes.

Connected aquifers bounce back from short shocks but suffer in the long run, while isolated ones resist quick changes but weaken over time.

🔗 www.nature.com/articles/s43...

#SciComm 🧪 #ClimateCrisis
Groundwater microbiomes balance resilience and vulnerability to hydroclimatic extremes - Communications Earth & Environment
Microbiomes in connected aquifers are more vulnerable to surface disturbances but highly resilient, while those in hydrologically more isolated aquifers resist short-term change yet lose stability und...
www.nature.com
August 23, 2025 at 4:23 PM
Curious about how lake water temperatures may change by the end of the 21st century? Check out our new paper in L&O!

aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
Climate‐driven alterations of lake thermal regimes
Temperate lakes are undergoing climate-driven alterations in their thermal regimes, changing their ecology. Previous efforts to understand temperature changes have overlooked multi-dimensional temper...
aslopubs.onlinelibrary.wiley.com
August 22, 2025 at 2:14 PM
Reposted by Christopher J. Sullivan, PhD
The first paper from my PhD is out now! 🦪

The presence of pea crabs (a bivalve kleptoparasite) is associated with higher mercury concentrations in their host oysters.... and more!!
@noeliemolbert.bsky.social @jebrandt.bsky.social

www.sciencedirect.com/science/arti...
Macroparasite infection and mercury contamination as coupled stressors in Eastern oysters
Contaminants and parasites are ubiquitous in aquatic environments and their interactions can have detrimental effects on host physiological and ecolog…
www.sciencedirect.com
July 15, 2025 at 12:35 PM
Reposted by Christopher J. Sullivan, PhD
Fam — here’s a nice overview of the 43 nationwide Cooperative Fish & Wildlife Research Units, which have been a lasting model for wildlife research since the 1930s, created by wildlife science pioneers such as Aldo Leopold & Ding Darling. 🐟🦌🦆🦃🦎

Link: wildlifemanagement.institute/outdoor-news...
Cooperative Research Units Program Unveils Two Informative Fact Sheets
The Cooperative Research Units Program is excited to release two new fact sheets: “A Hawk’s View of 2024” and “10-Year Overview.” The fact sheets highlight our program’s success in training of the nex...
wildlifemanagement.institute
May 20, 2025 at 1:18 PM
Reposted by Christopher J. Sullivan, PhD
New paper out by former @uconn.bsky.social EEB grad student Grace Vaziri:
www.sciencedirect.com/science/arti...
Does thermal stress change wood frog microbiomes? (not so much)
Stay tuned for more work by Grace on overwinter immune physiol of wood frogs
Gut microbiomes are largely unchanged when exposed to their amphibian host's latitudinally variable upper thermal limit
Climate change will increase the frequency and severity of temperature extremes. Links between host thermal physiology and their gut microbiota sugges…
www.sciencedirect.com
January 24, 2025 at 12:28 PM