Samuel Church
@shchurch.bsky.social
200 followers 220 following 10 posts
evolutionary biologist at NYU Biology, lab website: https://shchurch.github.io/
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Reposted by Samuel Church
wormsrock.bsky.social
C. elegans is a real animal and we set out to understand how it comes to have its distinctive biogeography. Its ancestral center of diversity is in the higher elevation forests of Hawaii. Its closest relatives are spread across east Asia. Did they travel from Asia? [Preprint 🧵]
shchurch.bsky.social
The Church Evolution Laboratory (CEL@NYU) will be official as of Sep 1st: shchurch.github.io. We are recruiting at all levels, including a postdoc to work on evolutionary patterns and processes via comparative genomics in Hawaiian Drosophila. Please share widely!
Church Evolution Laboratory
Department of Biology, New York City
shchurch.github.io
shchurch.bsky.social
Such cool work by @rbabedon.bsky.social! These results came from his awesome senior thesis on Atlantic man-o-war dispersal. He found iNat (@inaturalist.bsky.social) records of young colonies, they look like tiny living bubbles before they grow into the sailing giants we sometimes see further North
a juvenile Physalia colony, a glassy bubble on the beach with a small tentacle, credit Ashley user arabella-31 via iNaturalist: https://www.inaturalist.org/observations/256003990
Reposted by Samuel Church
rbabedon.bsky.social
Check out our preprint 🧪 on the origin & dispersal dynamics of a sailing ⛵ #siphonophore! We use #iNaturalist and particle tracking simulations to show that juvenile man o' war surface in the Gulf of Mexico & Straits of FL and disperse rapidly along the Gulf Stream 🌊

www.biorxiv.org/content/10.1...
From surfacing to stranding: The origins and dispersal dynamics of a neustonic siphonophore
The siphonophore Physalia physalis regularly strands along the US East Coast, yet the dynamics driving its seasonal and geographic distribution in this region remain poorly understood. Building on a n...
www.biorxiv.org
Reposted by Samuel Church
krishnanyamuna.bsky.social
A big blow to All of Science, not just Harvard, not just the Fly community, not just Genetics. All of Science. Turbocharge was just switched off. Flies gave us so many insights.
drglam.bsky.social
I just got the notice that all the FlyBase people at Harvard, including me, will be laid off on October 12. I'm devastated.
Reposted by Samuel Church
pawelburkhardt.bsky.social
Marine biodiversity: Gone with the wind? Our dispatch out now in @currentbiology.bsky.social

New research shows that wind and currents act as invisible barriers, reshaping our view of ocean connectivity. 🌊🪼

authors.elsevier.com/a/1lYLj3QW8S...
@iramaegele.bsky.social @msarscentre.bsky.social
shchurch.bsky.social
Thanks, you as well!
shchurch.bsky.social
Wish I could be at #Evol2025 this year! I’ll be starting a new lab at NYU this fall, and will be recruiting at all levels. Please spread the word if you know anyone who wants to work on evo. genomics, phylogenies, and comparative development of inverts (like Hawaiian Drosophila!) shchurch.github.io
Drosophila picticornis, a Hawaiian fly with patterned wings
shchurch.bsky.social
Wow thanks Jenn! It could not have happened without you, we were very lucky you joined the Physalia team 🪼
shchurch.bsky.social
My favorite outcome was validating species descriptions from 18th century scientists who illustrated animals on their voyages. Their descriptions were often rejected as implausible – we found that in many cases they were exactly right. Yet another reason why @biodivlibrary.bsky.social is so valuable
illustrations of four species of Physalia alongside original drawings and iNaturalist images. Maps of positively identified iNaturalist records show the distribution of each species.
shchurch.bsky.social
Excited to share our study on sailing siphonophores, AKA bluebottles or man-o'-war! 🌊 we received hundreds of samples from scientists around the world, part of a huge effort to sequence genomes and test for multiple species 🧬 out today in @currentbiology.bsky.social doi.org/10.1016/j.cu... 🦑🧪📌
Physalia megalista, a cnidiran with a gas filled float, raised sail, and long blue tentacles hanging below. Image credit: Dalila Destanović
Reposted by Samuel Church
patrickmckenzie.bsky.social
New preprint out today! A really fun collaboration with @shchurch.bsky.social and Robin Hopkins in which we study flower color variation in Monarda fistulosa using iNaturalist data. We process >40,000 images and use them to phenotype flower color in >16,000 observations: doi.org/10.1101/2025...
Figure 1: Steps with representative photographs of the flower color phenotyping pipeline. A) We exported all research-grade iNaturalist observations of Monarda fistulosa from GBIF. B) We used GPT-4o to classify each image as to whether it contained a flower. C) We trained a Roboflow semantic segmentation model on a subset of images and applied the trained model to extract “flower” pixels from each image in the dataset. D) We calculated the geometric median of each set of extracted pixels to represent the flower color phenotype from each image, and we paired this phenotype with the observation’s iNaturalist metadata for spatial analysis. Figure 2: Spatial summary of Monarda fistulosa flower colors across North America. A) Map of the color of M. fistulosa flowers. Each square is a 200km x 200km cell with the color corresponding to the average median CIELAB color value of each observation in the cell. The dotted line denotes -100° longitude, separating eastern and western regions of the range. B) Boxplots summarizing LCh color components west and east of -100° longitude, with each box showing the median and interquartile range, and with the color of each box reflecting the geometric median CIELAB value from west and east, respectively.