Samridhi Chaturvedi
@samridhi.bsky.social
Evolutionary genomics 🧬, Molecular ecology, 🦋🦋🦋 biology, Assistant Professor, EEB, Tulane University
https://chaturvedi-lab.wp.tulane.edu/
https://chaturvedi-lab.wp.tulane.edu/
Reposted by Samridhi Chaturvedi
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
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
Reposted by Samridhi Chaturvedi
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
Modestly, we decided to review a century's worth of theories of balancing selection :) onlinelibrary.wiley.com/doi/10.1111/...
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
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
Reposted by Samridhi Chaturvedi
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
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...
Reposted by Samridhi Chaturvedi
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/...
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
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/...
w/ @jaapderoode.bsky.social, @gabe-dubose.bsky.social, Joselyne Chavez, Lydia Fuller-Hall
Ecology Letters onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Samridhi Chaturvedi
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
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
Reposted by Samridhi Chaturvedi
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/...
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
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/...
Read now ahead of print!
www.journals.uchicago.edu/doi/10.1086/...
Reposted by Samridhi Chaturvedi
Tulane University's Department of Ecology and Evolutionary Biology seeks a Professor of Practice in marine biology. Application deadline extended; reviews start on December 15. Details: https://sse.tulane.edu/eebio. #job
Ecology and Evolutionary Biology | Tulane University School of Science and Engineering
Ecology and Evolutionary Biology | Tulane University School of Science and Engineering
sse.tulane.edu
October 30, 2025 at 5:50 PM
Tulane University's Department of Ecology and Evolutionary Biology seeks a Professor of Practice in marine biology. Application deadline extended; reviews start on December 15. Details: https://sse.tulane.edu/eebio. #job
Reposted by Samridhi Chaturvedi
Science is intertwined with eugenics; eugenic ideologies continue to negatively impact #Indigenous communities to this day.
In the October issue of #GENETICS, @jazlynmooney.bsky.social and colleagues offer a timely and important reminder on the perils of eugenics. buff.ly/1Q5r3XF
In the October issue of #GENETICS, @jazlynmooney.bsky.social and colleagues offer a timely and important reminder on the perils of eugenics. buff.ly/1Q5r3XF
October 29, 2025 at 8:03 PM
Science is intertwined with eugenics; eugenic ideologies continue to negatively impact #Indigenous communities to this day.
In the October issue of #GENETICS, @jazlynmooney.bsky.social and colleagues offer a timely and important reminder on the perils of eugenics. buff.ly/1Q5r3XF
In the October issue of #GENETICS, @jazlynmooney.bsky.social and colleagues offer a timely and important reminder on the perils of eugenics. buff.ly/1Q5r3XF
Reposted by Samridhi Chaturvedi
Herbarium specimens reveal shifts in species' elevational ranges
Zu et al.
nph.onlinelibrary.wiley.com/share/VB8MUG...
Zu et al.
nph.onlinelibrary.wiley.com/share/VB8MUG...
October 28, 2025 at 6:09 PM
Herbarium specimens reveal shifts in species' elevational ranges
Zu et al.
nph.onlinelibrary.wiley.com/share/VB8MUG...
Zu et al.
nph.onlinelibrary.wiley.com/share/VB8MUG...
Reposted by Samridhi Chaturvedi
Proud of the latest edition of my free intro biostats book.
gitrepo: github.com/ybrandvain/b...
book: ybrandvain.github.io/biostats/
Not complete but at a good point to take a break, and I think its quite usable
dm me with comments , ideas etc
gitrepo: github.com/ybrandvain/b...
book: ybrandvain.github.io/biostats/
Not complete but at a good point to take a break, and I think its quite usable
dm me with comments , ideas etc
Applied Biostatistics
ybrandvain.github.io
October 24, 2025 at 2:33 PM
Proud of the latest edition of my free intro biostats book.
gitrepo: github.com/ybrandvain/b...
book: ybrandvain.github.io/biostats/
Not complete but at a good point to take a break, and I think its quite usable
dm me with comments , ideas etc
gitrepo: github.com/ybrandvain/b...
book: ybrandvain.github.io/biostats/
Not complete but at a good point to take a break, and I think its quite usable
dm me with comments , ideas etc
Reposted by Samridhi Chaturvedi
Putting this here, partly to remind myself to read it (🙄) but also because it looks important and useful
onlinelibrary.wiley.com/doi/epdf/10....
onlinelibrary.wiley.com/doi/epdf/10....
A Causal Inference Framework for Climate Change Attribution in Ecology
Accurately attributing ecological shifts to climate change remains a significant challenge. Here, we present an accessible causal inference framework designed for climate change attribution in observ...
onlinelibrary.wiley.com
October 24, 2025 at 5:49 PM
Putting this here, partly to remind myself to read it (🙄) but also because it looks important and useful
onlinelibrary.wiley.com/doi/epdf/10....
onlinelibrary.wiley.com/doi/epdf/10....
Reposted by Samridhi Chaturvedi
Dr Bala Chaudhary, @balachaudhary.bsky.social receives the Equality and Diversity Champion Award.
October 22, 2025 at 10:20 AM
Dr Bala Chaudhary, @balachaudhary.bsky.social receives the Equality and Diversity Champion Award.
Reposted by Samridhi Chaturvedi
Last week @science.org mRNA initiation and termination are spatially coordinated | Science www.science.org/doi/10.1126/... from @anafiszbein.bsky.social @athmapai.bsky.social et al.
October 13, 2025 at 2:03 AM
Last week @science.org mRNA initiation and termination are spatially coordinated | Science www.science.org/doi/10.1126/... from @anafiszbein.bsky.social @athmapai.bsky.social et al.
Reposted by Samridhi Chaturvedi
This:
www.nature.com/articles/d41...
Absolutely yes. And I'm proud that @asn-amnat.bsky.social has led the way on this with requiring code and data editors checking code for about five years now!
www.nature.com/articles/d41...
Absolutely yes. And I'm proud that @asn-amnat.bsky.social has led the way on this with requiring code and data editors checking code for about five years now!
Stop treating code like an afterthought: record, share and value it
Scientists, research institutions, funders, libraries and publishers must all improve software practices.
www.nature.com
October 9, 2025 at 3:52 PM
This:
www.nature.com/articles/d41...
Absolutely yes. And I'm proud that @asn-amnat.bsky.social has led the way on this with requiring code and data editors checking code for about five years now!
www.nature.com/articles/d41...
Absolutely yes. And I'm proud that @asn-amnat.bsky.social has led the way on this with requiring code and data editors checking code for about five years now!
Reposted by Samridhi Chaturvedi
I’m excited to announce that I am starting a postdoc position in the Gompert Lab at USU.
It brings me comfort and joy to study processes of change and adaptation- how boundaries between groups can break down and result in more variable and resilient populations. Catch me learning about 🦋 hybrids!!
It brings me comfort and joy to study processes of change and adaptation- how boundaries between groups can break down and result in more variable and resilient populations. Catch me learning about 🦋 hybrids!!
October 8, 2025 at 4:46 PM
I’m excited to announce that I am starting a postdoc position in the Gompert Lab at USU.
It brings me comfort and joy to study processes of change and adaptation- how boundaries between groups can break down and result in more variable and resilient populations. Catch me learning about 🦋 hybrids!!
It brings me comfort and joy to study processes of change and adaptation- how boundaries between groups can break down and result in more variable and resilient populations. Catch me learning about 🦋 hybrids!!
Reposted by Samridhi Chaturvedi
The impact of climate and habitat on body shape and size evolution in whip spiders (Amblypygi) https://www.biorxiv.org/content/10.1101/2025.10.06.680801v1
October 7, 2025 at 10:33 PM
The impact of climate and habitat on body shape and size evolution in whip spiders (Amblypygi) https://www.biorxiv.org/content/10.1101/2025.10.06.680801v1
Reposted by Samridhi Chaturvedi
Very excited to share that our work assessing the genomic diversity of snow leopards has come out today in PNAS! Spoiler alert - they have the lowest genetic diversity of all big cats!
www.pnas.org/doi/10.1073/...
news.stanford.edu/stories/2025...
@petrovadmitri.bsky.social @elliecat.bsky.social
www.pnas.org/doi/10.1073/...
news.stanford.edu/stories/2025...
@petrovadmitri.bsky.social @elliecat.bsky.social
Exceedingly low genetic diversity in snow leopards due to persistently small population size | PNAS
Snow leopards (Panthera uncia) serve as an umbrella species whose conservation benefits
their high-elevation Asian habitat. Their numbers are belie...
www.pnas.org
October 7, 2025 at 9:10 PM
Very excited to share that our work assessing the genomic diversity of snow leopards has come out today in PNAS! Spoiler alert - they have the lowest genetic diversity of all big cats!
www.pnas.org/doi/10.1073/...
news.stanford.edu/stories/2025...
@petrovadmitri.bsky.social @elliecat.bsky.social
www.pnas.org/doi/10.1073/...
news.stanford.edu/stories/2025...
@petrovadmitri.bsky.social @elliecat.bsky.social
Reposted by Samridhi Chaturvedi
About 1% of US railway mileage is electrified, with only tiny steps taken to electrify more in recent years (Caltrain) www.fastcompany.com/91178844/ind...
Not nearly enough is made of the incredibly impressive feat Indian Railways has made to electrify almost 100% of its 135,000km of track, while also growing renewable sourcing. Huge:
timesofindia.indiatimes.com/business/ind...
timesofindia.indiatimes.com/business/ind...
Indian Railways to achieve net zero targets in 2025 itself - 5 years ahead of 2030 goal - Times of India
India Business News: Indian Railways is set to achieve net-zero targets by year-end, surpassing its 2030 goal through extensive electrification. Aiming for 95% electric tr
timesofindia.indiatimes.com
October 5, 2025 at 7:34 PM
About 1% of US railway mileage is electrified, with only tiny steps taken to electrify more in recent years (Caltrain) www.fastcompany.com/91178844/ind...
Reposted by Samridhi Chaturvedi
Jane Goodall, Eminent Primatologist Who Chronicled the Lives of Chimps, Dies at 91. Gift link: nyti.ms/48FOuUn
nyti.ms
October 1, 2025 at 6:25 PM
Jane Goodall, Eminent Primatologist Who Chronicled the Lives of Chimps, Dies at 91. Gift link: nyti.ms/48FOuUn
Reposted by Samridhi Chaturvedi
My friend @jbyoder.org has a new paper about coevolution that I think is very good and smart. However, we're still in a fight about whether the clownfish-anemone symbiosis is coevolution. So, share and read his paper, or do not. I will let you know if he apologizes academic.oup.com/evolut/advan...
Don’t ask “when is it coevolution?” — ask “how?”
Abstract. Coevolution has come to be widely understood as specific, simultaneous, reciprocal adaptation by pairs of interacting species. This strict-sense
academic.oup.com
September 27, 2025 at 10:44 PM
My friend @jbyoder.org has a new paper about coevolution that I think is very good and smart. However, we're still in a fight about whether the clownfish-anemone symbiosis is coevolution. So, share and read his paper, or do not. I will let you know if he apologizes academic.oup.com/evolut/advan...
Reposted by Samridhi Chaturvedi
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 🧵]
September 24, 2025 at 8:33 PM
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 🧵]
Reposted by Samridhi Chaturvedi
🚨New work🚨 led by Ph.D. student Dipesh Chuphal (IIT Gandhinagar), shows that the recent drying of the Ganga River basin is unprecedented in 1,300 years—more severe than historical famines. This ~multidecadal drying appears forced, but many models do not capture it. ☔️ 🌧️
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
September 22, 2025 at 7:45 PM
🚨New work🚨 led by Ph.D. student Dipesh Chuphal (IIT Gandhinagar), shows that the recent drying of the Ganga River basin is unprecedented in 1,300 years—more severe than historical famines. This ~multidecadal drying appears forced, but many models do not capture it. ☔️ 🌧️
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
Reposted by Samridhi Chaturvedi
How do populations maintain an evolutionary memory? I am happy to share that our work with Dmitri Petrov @petrovadmitri.bsky.social, Paul Schmidt, and colleagues on dominance reversal and stabilization of insecticide resistance in changing environments over time is now published at Nature EE.
Beneficial reversal of dominance maintains a large-effect resistance polymorphism under fluctuating insecticide selection - Nature Ecology & Evolution
Measuring selection and dominance in fitness of the insecticide-resistant Ace alleles in Drosophila melanogaster, the authors show evidence for beneficial reversal of dominance, a mechanism that can s...
www.nature.com
September 15, 2025 at 6:17 PM
How do populations maintain an evolutionary memory? I am happy to share that our work with Dmitri Petrov @petrovadmitri.bsky.social, Paul Schmidt, and colleagues on dominance reversal and stabilization of insecticide resistance in changing environments over time is now published at Nature EE.
“Two Z and two W sex chromosomes are also identified. The largest Z chromosome comprises the ancestral Z fused with an autosome while the other is a neo-Z that is a fusion of two autosomes. The two W chromosomes are derived from copies of the Z-linked sequences.” 🤯
How many chromosomes can an animal have?
In our paper out now in @currentbiology.bsky.social we show that the Atlas blue butterfly has 229 chromosome pairs- the highest in diploid Metazoa! These arose by rapid autosome fragmentation while sex chromosomes stayed intact.
www.cell.com/current-biol...
In our paper out now in @currentbiology.bsky.social we show that the Atlas blue butterfly has 229 chromosome pairs- the highest in diploid Metazoa! These arose by rapid autosome fragmentation while sex chromosomes stayed intact.
www.cell.com/current-biol...
Constraints on chromosome evolution revealed by the 229 chromosome pairs of the Atlas blue butterfly
The genome of the Atlas blue butterfly contains ten times more chromosomes than most
butterflies, and more than any other known diploid animal. Wright et al. show that
this extraordinary karyotype is ...
tinyurl.com
September 13, 2025 at 3:15 PM
“Two Z and two W sex chromosomes are also identified. The largest Z chromosome comprises the ancestral Z fused with an autosome while the other is a neo-Z that is a fusion of two autosomes. The two W chromosomes are derived from copies of the Z-linked sequences.” 🤯