Samridhi Chaturvedi
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samridhi.bsky.social
Samridhi Chaturvedi
@samridhi.bsky.social
590 followers 450 following 65 posts
Evolutionary genomics 🧬, Molecular ecology, 🦋🦋🦋 biology, Assistant Professor, EEB, Tulane University
https://chaturvedi-lab.wp.tulane.edu/
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Reposted by Samridhi Chaturvedi
anchieri.bsky.social
Interested in using aDNA time-series datasets to estimate selection?

Our study "Assessing Ancient DNA Sampling Strategies for Natural Selection Inference in Humans Using Allele Frequency Time Series Data" is now out in GBE! doi.org/10.1093/gbe/... @genomebiolevol.bsky.social @cegamorim.bsky.social
Assessing Ancient DNA Sampling Strategies for Natural Selection Inference in Humans Using Allele Frequency Time Series Data
Abstract. The increased availability of genomic data from ancient humans allows estimating the strength of natural selection at a given locus using time se
doi.org
February 3, 2026 at 9:17 AM
Reposted by Samridhi Chaturvedi
biorxiv-genetic.bsky.social
Ancient human genomes from Ladakh reveal Tibetan, South Asian, and Central Asian admixture over the last three millennia https://www.biorxiv.org/content/10.64898/2026.01.26.701789v1
January 28, 2026 at 1:31 PM
Reposted by Samridhi Chaturvedi
asn-amnat.bsky.social
Special Feature: Can we predict the future of evolution? In this review, Jackson et al. dig into genomic analyses of change over time to determine if and when evolution can be forecast using genomic methods.

Read now ahead of print!
www.journals.uchicago.edu/doi/10.1086/...
The American Naturalist classic cover
January 21, 2026 at 3:46 AM
Reposted by Samridhi Chaturvedi
molbioevol.bsky.social
@mariusmaur.bsky.social et al. investigate the venom system in Neuroptera by integrating genomics, transcriptomics and functional assays, showing that their toxin arsenal is the result of a multitude of genomic and evolutionary mechanisms.

🔗 doi.org/10.1093/molbev/msaf326

#evobio #molbio
The green lacewing venom system and the complex mechanisms underlying its evolution
Abstract. Venom has independently evolved across many lineages, yet relatively few have been studied in detail, particularly among insects. Of these, Neuro
doi.org
January 5, 2026 at 3:16 PM
Reposted by Samridhi Chaturvedi
lepphylo.bsky.social
Super cool new study from Talavera lab on migratory divide between painted lady (Vanessa cardui) populations north of the equator and south of the equator! They find a candidate gene that might be associated with the differenc ein behaviour.
www.nature.com/articles/s41...
A north-south hemispheric migratory divide in the butterfly Vanessa cardui - Nature Communications
Here authors find a latitudinal migratory divide in a butterfly across Earth’s hemispheres, highlighting how hemisphere-specific seasonality and navigational cues shape migratory strategies. They find...
www.nature.com
January 2, 2026 at 9:46 AM
Reposted by Samridhi Chaturvedi
thecowbirdlab.bsky.social
www.cell.com/trends/ecolo...
Pangenomes: new tools for ecological and evolutionary genomics
Genomic structural variation is an important component of genetic variation in natural populations. By assembling and analyzing multiple high-quality genomes within a species or clade, pangenomes capt...
www.cell.com
December 26, 2025 at 3:01 PM
Reposted by Samridhi Chaturvedi
jpjahner.bsky.social
I am recruiting a MS student in Biology at New Mexico Tech with an anticipated start date of Fall 2026 to work on the applied evolutionary genetics of wild populations with conservation or management concerns (butterflies, bighorn sheep). Please see the attached advertisement for more info.
An image of a recruitment advertisement for a MS position at New Mexico Tech
December 22, 2025 at 6:58 PM
Reposted by Samridhi Chaturvedi
jbyoder.org
Dark-eyed juncos living in urbanized Los Angeles have shorter bills than juncos in nearby natural areas— but while UCLA was closed for COVID-19 safety, campus juncos evolved longer bills again 🪶🌿

buff.ly/BOOinne
Screenshot of Fig 2A from the linked paper, plotting mean ±SE of residual bill length by tarsus length for UCLA juncos by their hatch year in comparison to the same measure for nearby natural-area juncos; before and after the COVID anthropause the UCLA juncos have bills much shorter than the natural-areas juncos, but during 2020 and 2021 the UCLA junco bill lengths spike upwards to be comparable to the natural-areas juncos
December 17, 2025 at 3:12 PM
Reposted by Samridhi Chaturvedi
nhcooper123.bsky.social
Excited to launch the new improved Reproducible Code guide from @britishecologicalsociety.org @methodsinecoevol.bsky.social FREE online here! www.britishecologicalsociety.org//wp-content/... Amazing work by some very talented ECRs. We hope it’s useful!
Book cover for Reproducible Code guide. The cover has a red background with a large yellow-bodied black-headed stag beetle.
December 16, 2025 at 3:03 PM
Reposted by Samridhi Chaturvedi
science.org
Butterfly populations across the U.S. are in alarming decline, a Science study finds, with total abundance falling by 22% in just 20 years.

Such widespread losses emphasize the urgent need for conservation action. https://scim.ag/4ombGv3 #WildlifeConservationDay
December 4, 2025 at 5:38 PM
Reposted by Samridhi Chaturvedi
floridamuseum.bsky.social
Alia Donly, a Utah State University student, traveled here to the McGuire Center to image and DNA sample all of our specimens of the Sand Mountain Blue butterfly (Euphilotes pallescens arenamontana) that lives on a single dune system in Nevada.

Read more:
www.floridamuseum.ufl.edu/mcguire/news...
a person is leaning over a scanner of some kind under bright lights around her to put something tiny on the glass in a room lined with shelves full of shallow wooden drawers two tiny butterfly specimens, one blue and one white with spots, are mounted above a ruler and several cards with species names and collection location
December 4, 2025 at 3:25 PM
Reposted by Samridhi Chaturvedi
samridhi.bsky.social
Super happy to share the *first* lab publication. Out today in Molecular Ecology - a review of methods used to identify repeated adaptation using genomic data (1)

Molecular Ecology | Molecular Genetics Journal | Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
November 22, 2025 at 5:53 PM
Reposted by Samridhi Chaturvedi
projectpsyche.bsky.social
(1/5)Thrilled to announce our paper on #ProjectPsyche is out! 🦋We describe how we’ve generated 1000+ high-quality genomes for European Lepidoptera, providing an unprecedented resource for biodiversity, conservation, and evolutionary research.
#Genomics #Biodiversity
www.cell.com/trends/ecolo...
Project Psyche: reference genomes for all Lepidoptera in Europe
Project Psyche is a transnational initiative to generate and study chromosome-level reference genomes of all ~11 000 species of Lepidoptera (butterflies and moths) found in Europe. Here, we describe t...
www.cell.com
November 27, 2025 at 1:22 PM
Reposted by Samridhi Chaturvedi
natecoevo.nature.com
Analysis of crop yields, farmer income and bird species abundances identifies multiple positive outcomes of a large-scale Indian government-incentivized agroecology initiative. 🧪

www.nature.com/articles/s41...
India’s agroecology programme, ‘Zero Budget Natural Farming’, delivers biodiversity and economic benefits without lowering yields - Nature Ecology & Evolution
Analysis of crop yields, farmer income and bird species abundances identifies multiple positive outcomes of a large-scale Indian government-incentivized agroecology initiative.
www.nature.com
September 19, 2025 at 1:56 PM
samridhi.bsky.social
Super happy to share the *first* lab publication. Out today in Molecular Ecology - a review of methods used to identify repeated adaptation using genomic data (1)

Molecular Ecology | Molecular Genetics Journal | Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
November 22, 2025 at 5:53 PM
Reposted by Samridhi Chaturvedi
andrewlhipp.bsky.social
This just out from @mortonarboretum.bsky.social Rebekah Mohn: reference genome and read mapping method both affect phylogenetic inference & heterozygosity estimates across species.

Punchline? Use a closely related but not conspecific reference.

Open-access!

onlinelibrary.wiley.com/doi/10.1111/...
Variant Calling in the Goldilocks Zone: How Reference Genome Choice and Read Mapping Stringency Impact Heterozygosity Estimates and Phylogenetic Analyses
The increasing numbers of published reference genomes and affordability of whole genome resequencing have enabled multispecies population genomic and phylogenomic studies on non-model organisms, but ...
onlinelibrary.wiley.com
November 20, 2025 at 1:32 PM
Reposted by Samridhi Chaturvedi
chriscrsmith.bsky.social
Hello bluesky community!

I'm hiring a postdoc to do machine learning in population genetics.
Starting to build up a lab at Indiana University Bloomington where I just started a faculty position.
Apply with the below link: indiana.peopleadmin.com/postings/30325
Postdoctoral Research Fellow
The department of Biology is a large, unified department with strong undergraduate degrees, nationally-ranked graduate programs, and world-class research spanning the breadth of biological questions a...
indiana.peopleadmin.com
August 11, 2025 at 11:51 AM
Reposted by Samridhi Chaturvedi
jbyoder.org
Nifty preprint with an experiment coevolving Brassica rapa with pollinating, herbivorous butterflies. With bumblebee co-pollinators or heat stress added, the plants evolved stronger anti-herbivore defense; with both bees and heat, they evolved... to attract butterflies? 🌿

doi.org/10.1101/2025...
Figure 1 from the linked preprint, showing PCA of phenotypic change in the plants and butterflies. Caption: Phenotypic divergence of plants (A) and butterflies (B) after 6 generations of selection under different temperature and biotic/pollination environments. Blue = ambient temperature, red = hot temperature, H = hand pollination (circles in A), Control = Pieris-control (circles in B), Coevo = coevolution Pieris-only (squares), CoB = coevolution Pieris + bumblebees (triangles). Linear discriminant analyses included all plant phenotypic traits (n=19) and all butterfly phenotypic traits. For plants, double centroids per treatment combination represents replicates A and B. For butterflies, only one replicate was used due to replicate extinctions except for ambient Co, for which replicates were grouped to keep treatments comparable. P-values are based on permutational multivariate analysis of variance. Each temperature-biotic environment combination consisted of 68-144 plants and 36-100 butterflies. Characters with high loadings for LD1 and LD2 are shown along each axis.
November 17, 2025 at 3:19 PM
Reposted by Samridhi Chaturvedi
patrickmckenzie.bsky.social
Available now in @asn-amnat.bsky.social ! Taking on some big-scale natural history: processed >40k @inaturalist.bsky.social images of Monarda fistulosa using computer vision to query for flower presence and phenotype flower color: doi.org/10.1086/739413
November 14, 2025 at 6:29 PM
Reposted by Samridhi Chaturvedi
filipruzicka.bsky.social
Modestly, we decided to review a century's worth of theories of balancing selection :) onlinelibrary.wiley.com/doi/10.1111/...
A century of theories of balancing selection
Traits that affect organismal fitness are often highly genetically variable. This genetic variation is vital for populations to adapt to their environments, but it is also surprising given that natur...
onlinelibrary.wiley.com
November 14, 2025 at 2:31 PM
samridhi.bsky.social
Congratulations to the *first* Chaturvedi Lab PhD candidate Vineesha, on passing her prospectus with flying colors today!!!! Here are both of us after all the exam (and a long discussion on statistics). Way to go Vineesha!!! #ProudPI
November 12, 2025 at 10:41 PM
Reposted by Samridhi Chaturvedi
gusanero.bsky.social
Not any news to love these days, but I do love this paper on caterpillar sensory ecology. I can't wait to use figures from this for teaching. link.springer.com/article/10.1...
The sensory ecology of caterpillars - Journal of Comparative Physiology A
Caterpillars (larval Lepidoptera) are one of the most ecologically and evolutionarily significant taxa on Earth. As both feeders and food, they shape the dynamics of enumerate ecosystems on land. Key ...
link.springer.com
November 10, 2025 at 5:10 PM
Reposted by Samridhi Chaturvedi
chriscatano.bsky.social
New paper showing how immigration alters the ecological processes structuring the assembly and variation in #Monarch caterpillar gut #microbiomes.

w/ @jaapderoode.bsky.social, @gabe-dubose.bsky.social, Joselyne Chavez, Lydia Fuller-Hall

Ecology Letters onlinelibrary.wiley.com/doi/10.1111/...
Experimental Immigration Mediates Ecological Selection and Drift in Monarch Microbiome Assembly
The distribution of biodiversity depends on processes operating across scales, yet multiscale paradigms have struggled to permeate host-microbiome research. By integrating multi-scale ecological theo...
onlinelibrary.wiley.com
November 10, 2025 at 2:40 PM
Reposted by Samridhi Chaturvedi
biorxiv-evobio.bsky.social
Coevolution in a warming world: an experimental test of the geographic mosaic of coevolution https://www.biorxiv.org/content/10.1101/2025.11.06.686912v1
November 7, 2025 at 9:32 PM
Reposted by Samridhi Chaturvedi
asn-amnat.bsky.social
ASN VP Symposium: Functional Resurveys and Models Reveal the Interplay of Plasticity and Evolution of Pierid Butterflies in Response to Recent Climate Change by Buckley and Kingsolver

Read now ahead of print!
www.journals.uchicago.edu/doi/10.1086/...
Functional Resurveys and Models Reveal the Interplay of Plasticity and Evolution of Pierid Butterflies in Response to Recent Climate Change* | The American Naturalist
Abstract The extent of contemporary evolution, which is mediated by interactions with plasticity, will be an important determinant of biological responses to climate change. We synthesize two function...
www.journals.uchicago.edu
November 7, 2025 at 9:42 PM