Sergey Kryazhimskiy
@skryazhi.bsky.social
1.5K followers 460 following 230 posts
Work in progress | Evolution | Ecology | Systems Biology | Experiments | Theory | Running a lab @ucsdbiosciences | http://sklab.science | https://thoughtsforbreakfast.wordpress.com/
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skryazhi.bsky.social
Dear colleagues!

@davidmccandlish.bsky.social and I are serving as guest editors for the new special issue of GENETICS on fitness landscapes:

doi.org/10.1093/gene...

Submissions are due on March 18, 2026. Please spread the word! And reach out if you have questions.
The Fitness Landscape: A Call for Papers
Ruth Isaacson; The Fitness Landscape: A Call for Papers, Genetics, , iyaf206, https://doi.org/10.1093/genetics/iyaf206
doi.org
Reposted by Sergey Kryazhimskiy
bjenquist.bsky.social
This looks to be a fundamental theoretical advance by @jpodwyer.bsky.social et al. Using linkage disequlibrium-based Ne to back out σ² and then predict fluctuation sizes from a single temporal snapshot is a real advance for broad application 🧪🌐https://www.science.org/doi/10.1126/science.adu6396
Genomic demography predicts community dynamics in a temperate montane forest
Species population sizes fluctuate over time, and these temporal dynamics play a key role in governing the maintenance of biodiversity. Although modeling approaches have been developed to characterize...
www.science.org
Reposted by Sergey Kryazhimskiy
erikbakkeren.bsky.social
Note it in your calendars! Aug 3-5, 2026. Excited to bring back MEEHubs to a hub near you (Switzerland, USA, Canada, Mexico, UK, Ukraine, or virtual only)‼️
meehubs.bsky.social
We’re back! ✨ The next #MeeHubs26 is coming with 7 hubs across the globe and incredible lineups at each. Can’t wait to share more soon! meehubs.org
Home
meehubs.org
Reposted by Sergey Kryazhimskiy
mcsweeneys.net
"Fascist regimes have classic, telltale traits, like vilifying immigrants, adopting patriotic symbolism of their nation’s glorious past, and embracing a narrow definition of masculinity and family values. But just because we also do all of those things does not make us fascists."
We Are Not Fascists, and If You Call Us Fascists, We Will Arrest You
President Trump had another successful week of what is already the greatest presidency of all time, and yet, the woke leftist mob continues to deli...
buff.ly
Reposted by Sergey Kryazhimskiy
evodynamics.bsky.social
Looking forward to this! A non-Elsevier alternative to Theoretical Population Biology / Journal of Theoretical Biology
stanfordpress.bsky.social
Population Biology Modeling & Theory (PBMT) is a peer-reviewed journal reporting advances in modeling and theory within population biology. Its scope spans demography, ecology, epidemiology, evolutionary biology, population genetics, and phylogenetics. PBMT will be online soon.
Reposted by Sergey Kryazhimskiy
klohmueller.bsky.social
In the midst of the darkness, I am pleased to announce that UCLA will be hosting the upcoming Southern California Evolutionary Genetics (SCalE) conference on November 1! Registration & abstract submission is here: www.scalemeeting.org/home Deadline is October 13! Hope to see you at UCLA!
Home
The SCalE Meeting is a free, one day regional academic meeting focused on evolutionary genetics and genomics. This year's SCalE Meeting is hosted by UCLA, sponsored by the Institute for Quantitative ...
www.scalemeeting.org
skryazhi.bsky.social
Will get to them in the next decade for sure!
Reposted by Sergey Kryazhimskiy
khakhalin.bsky.social
I increasingly feel that LLMs will democratize tech for one simple but weird reason

Look.

LLMs make startups of 1-2 people possible, as if you know exactly what you want, you can now build and iterate faster

But the opposite is also true! In large organizations the friction is getting higher!!
1/
Reposted by Sergey Kryazhimskiy
triggerloop.bsky.social
I think the R01 is basically a non-starter at NIGMS now. Data from NIH Reporter for new and competing awards, comparing number of R01s issued relative to R35s (MIRA). This has major ramifications for basic science and basic science investigators that are not yet in the MIRA pool
Graph showing total R35+R01 awards issued by NIGMS from 2020 to 2025. R01 in black showing a steep decline. R35 showing an increase. Total awards in 2025 slightly up from 2024 but these years are lower than 2020-2023
Reposted by Sergey Kryazhimskiy
Reposted by Sergey Kryazhimskiy
megbehri.bsky.social
Our lab is hiring!!
We are looking for a research assistant who will be involved with our experimental evolution studies on how stress affects population dynamics in E. coli.
Great opportunity for recent grads!
E-mail for more info and apply here:
ecsr.fa.us2.oraclecloud.com/hcmUI/Candid...
Reposted by Sergey Kryazhimskiy
jeremymberg.bsky.social
Since there is some discussion that NIH institutes should not simply use paylines to determine which grants to fund, I thought I would share some old data.

These are plots of funding probability fas a function of percentile score for 9 institutes.

1/7
Graphs of funding curves for nine NIH institutes from fiscal year 2012.
Reposted by Sergey Kryazhimskiy
maxkozlov.bsky.social
NEW: Nature trained AI to predict which NIH grants from 2014 would have been cut if the Trump admin had its way back then — and what science would have been lost to history.

"The results show the damage that cuts in funding can do to research, and the unpredictable nature of the research process."
Reposted by Sergey Kryazhimskiy
Reposted by Sergey Kryazhimskiy
martinadalbello.bsky.social
Feel free to contact me for info about this open position and the project! Fully funded through @hfspo.bsky.social and in collaboration with @jacrickets.bsky.social and Shawn McGlynn
evoldir.bsky.social
Postdoc opportunity in Dal Bello Lab at Yale EEB (starting Dec 2025). Focus is on microbial ecology and learning mechanisms. Apply via email to Martina with CV. More info: https://www.dalbellolab.com/ #postdoc
dal bello lab
dal bello lab
www.dalbellolab.com
Reposted by Sergey Kryazhimskiy
craigmaclean.bsky.social
New ERC funded computational postdoc position in my lab! We are looking for someone who will study the genomics of bacterial evolution using samples from experimental evolution and clinical trials. Lots of opportunities for interesting and fun collaboration!
my.corehr.com/pls/uoxrecru...
Job Details
my.corehr.com
Reposted by Sergey Kryazhimskiy
djhelam1.bsky.social
I was recently invited by a cool student initiative from IISER in India @fishersfishes.bsky.social (fishersfishes.github.io) to talk about networks. I conveyed to undergraduates my ideas for how ecology, evolution and their interplay should be understood in light of biological system properties.
Jhelam Deshpande - Ecology, Evolution and Networks
YouTube video by Fishers Fishes
youtu.be
skryazhi.bsky.social
But hey, at least they are consistent!
Reposted by Sergey Kryazhimskiy
chrisadami.bsky.social
Can confirm.
ncweaver.skerry-tech.com
Why is this horrible for Universities?

Just about everyone who isn't a citizen or green card holder already who's hired for a tenure track faculty position is hired through an H1B and then, after 3-5 years, applies for a green card.

This is literally "No more foreign professors can be hired"
gergely.pragmaticengineer.com
Those on an H1B cannot return to the US from tomorrow (Sunday) unless paying $100K. This is an out-of-the blue presidential action. We’ll see software engineers stranded abroad.

One easy to predict outcome: those on US visas will travel less… for work, for conferences etc.
Reposted by Sergey Kryazhimskiy
slavov-n.bsky.social
America’s cancer research system, which has helped save millions of lives, is under threat in one of its most productive moments.

Trump Is Shutting Down the War On Cancer

www.nytimes.com/2025/09/14/m...
Trump Is Shutting Down the War On Cancer
www.nytimes.com
Reposted by Sergey Kryazhimskiy
slavov-n.bsky.social
What limits scientific creativity and originality ?

This article thoughtfully discusses many intertwined challenges, including:

Cultural Shift

Daily Grind

Less Is More

Their arguments generally resonate, except for one:

🧵
Reposted by Sergey Kryazhimskiy
chrisadami.bsky.social
This is really interesting! Mutations that affect a protein's foldability do not seem to impact org fitness if the protein is not important for function. But there *are* effects from mutations on those proteins (just not related to foldability). What are they due to??
www.biorxiv.org/content/10.1...
Collateral fitness effects of mutation are not commonly caused by protein misfolding
Mutations in coding sequences are often assumed to harm cells by destabilizing proteins and creating toxic misfolded species. Here we directly test how fitness scales with predicted folding stability....
www.biorxiv.org