Henry Arenas-Castro

The final part of the story: "The arduous path to obligate asexuality in Daphnia" is out in #ProcB 🥳 royalsocietypublishing.org/rspb/article.... 1. Instead of comparing long-established asexuals to sexuals, we generated new asexual lineages to observe the transition in action.

David Marques was an amazing speciation genomics researcher, a passionate birder, and a wonderful friend, husband, and father. May he rest in peace. www.nature.com/articles/s41...

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eyerolling at biorxiv

Olha aí gente! Free registration to virtual Evolution 2026.

Crop scientists have long recognized that reproduction is going to be the first point of failure for plants with rising global temperatures. However, this has often been overlooked by those studying natural populations. In this new review, we try to change that. ecoevorxiv.org/repository/v...

Emocionado por compartir, en español, un poco de mi investigación con @jenncoughlan.bsky.social sobre las bases genéticas de la coexistencia de dos plantas con poco aislamiento reproductivo en el marco del día de la niña y la mujer en la ciencia y el día de Darwin en Colombia. Nos vemos el jueves :)

Graphic announcing new AJB Synthesis article by Haley Branch.

Methodological illustration for asking whether X affects plants. “Question” provides an example of a question that both ecologists and evolutionary biologists ask, with categories of traits often of interest. “Experiment” shows trait examples and comparisons (populations, environmental, across time). Types of traits are where evolutionary biologists could expand their breadth. “Outcome” describes lasting effects of whether X affects traits to the point that it is passed on and contributes to future generations or it leads to extinction. “Outcomes” is where ecophysiologists could expand their work. Images courtesy of Dr. Stefanie Sultmanis (vein density), Dr. Beatrice Harrison Day (root section), and Dr. Vanessa Tonet (leaf cavitation).

🏵 Check out the latest #AJB Synthesis article, by Haley Branch! 🏵

The sleeping giant needs coffee: Overlooked areas for integrating plant #ecophysiology & evolutionary biology

doi.org/10.1002/ajb2...

#botany #plantscience #ecology #evolution

Emocionado por compartir, en español, un poco de mi investigación con @jenncoughlan.bsky.social sobre las bases genéticas de la coexistencia de dos plantas con poco aislamiento reproductivo en el marco del día de la niña y la mujer en la ciencia y el día de Darwin en Colombia. Nos vemos el jueves :)

La Asociación Colombiana de Biología Evolutiva #COLEVOL tiene nueva página web www.colevol.org. Conócenos y mantente informado sobre nuestras actividades. #cienciacriolla

Sunday read 😍
onlinelibrary.wiley.com/share/PIS49F...

First in-person evolution symposium in Colombia since 2019! Tons of enthusiastic, talented scholars looking for opportunities/networks. If you conduct research in LA, consider to participate/send students or organize a session/workshop. #COLEVOL has connected generations of evolutionary biologists!

Nuestra Comunidad: The Role of Latin American Networks in Supporting Ecologists Throughout Their Careers Click on the article title to read more.

esajournals.onlinelibrary.wiley.com/doi/full/10....

@esalatamcarib.bsky.social

The Prototaxites specimen resting on a mossy floor

21 / 23 This means that the first giant organisms on the Earth’s surface were not closely related to anything alive today. But despite its strangeness, in its time Prototaxites would have had an important role, being eaten by arthropods and having impacts on the ecosystem that we don’t yet know.

So proud that this is out 🐺⏳🧬🦏. First paper as a senior author (co-shared with @lovedalen.bsky.social; thanks for a great opportunity) and led by my awesome former MSc student @solveiggudjonsd.bsky.social and a brilliant CPG postdoc @edanalord.bsky.social (1/n)

OA: academic.oup.com/gbe/article/...

Genomic analyses in Drosophila do not support the classic allopatric model of speciation Abstract. The allopatric model of speciation has dominated our understanding of speciation biology and biogeography since the Modern Synthesis. It is uncon

New paper out: “allopatric” Drosophila species aren’t so allopatric after all. We show that most currently allopatric species pairs probably overlapped in the past and exchanged genes at levels similar to sympatric pairs. @evolletters.bsky.social

doi.org/10.1093/evle... [1/6]

Abstract Submission - 2026 Population, Evolutionary, and Quantitative Genetics Conference Visit our website to learn more.

Abstract submitted for #PEQG2026. Hope to see lots of you there! Just as a reminder, abstracts are due February 5th. genetics-gsa.org/peqg-2026/ab...

Registration for the 2026 NY Area Population Genetics meeting is now open, at events.simonsfoundation.org/e0mEoL?rt=8k.... Registration is free but required; if you are submitting an abstract, note that the deadline is *January 30th*.

Balanced polymorphism in a floral transcription factor underlies an ancient rhythm of daily sex alternation in avocado In avocado and certain wild relatives in Lauraceae, pollination occurs via a synchronized rhythm of floral sex timing between two hermaphroditic flowering types. A-type plants present female-phase flo...

Did you know there are 2 types of avocado varieties? A-types switch from female to male, B-types male to female, within a single day. This reciprocal sex alternation promotes cross-pollination and has a simple genetic basis. Read more in this recent preprint from the final chapter of my PhD thesis 🥑

I got to think about lots of cool/scary things working on this: (very) rapid adaptation, introgression of structural variants, invasive species, reproductive isolation, pesticide resistance, the precarity of food production. Grateful to have worked on such a big dataset with amazing collaborators

Mosaic tri-lineage secondary contact shapes diverse genomic outcomes in darters Abstract. Speciation does not always lead to complete reproductive isolation, which can result in hybrid zones with gene flow. In freshwater fishes, second

I am very excited to share our new paper with my amazing co-authors and mentors @dmacguig.bsky.social @fishgenomes.bsky.social @tjnear.bsky.social . We investigate a secondary contact zone in #darters. track.smtpsendmail.com/9032119/c?p=...

Congrats @jeffgroh.bsky.social et al. Some avocado trees open female-phase flowers in the morning & then male in afternoon. Others show complementary pattern (m->f), to synchronize pollination of two types. Jeff show this to be a >45Mya polymorphism at a transcription factor across 100s of species.

🚀 Exciting Opportunity for Early-Career Scientists! 🚀
Join AGA SEA Awardee RADCamp for a hands-on bioinformatics workshop in Monterrey, Mexico, July 20-27, 2026! Over 8 days, you'll prepare your own samples, run dual digest RAD-seq libraries, & analyze your data using ipyrad.
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Pangenomics in the Mimulus guttatus species complex, by Maddie James
onlinelibrary.wiley.com/doi/10.1111/...

Great perspective piece about the recently released monkeyflower genomes. Love the collision of my two academic worlds: Mimulus research through the lens of a Senecio scholar 🌼

Blue poster with text: “Botanical Society of America, Corresponding Members, 2025 Recipient.” Below is a photo of Natalia Pabón-Mora indoors, smiling and seated next to a microscope while holding a green potted plant. Text below reads: “Natalia Pabón-Mora, Universidad de Antioquia, Colombia.” Bottom corner includes a QR code with the text: “Learn more about the BSA Corresponding Members here!” and the BSA logo.

🎉 Help us celebrate Natalia Pabón-Mora (Universidad de Antioquia, Colombia), the 2025 BSA Corresponding Member!

This recognition is given to distinguished international scientists who have made major contributions to the plant sciences.

botany.org/home/awards/...

#BSA2025AwardsBlitz #IamaBotanist

Wendy Valencia is the epitome of the 21st century naturalist. She enriches our community with her sensibility to natural phenomena and generosity. Looking forward to reading this highly integrative study about cycads pollination!

I am still actively looking for postdoc positions — please lmk if you (or your friends and colleagues) need a hardworking postdoc with field, lab, and bioinformatic skills!

I am broadly interested in evolution in the ocean, conservation and population genetics, and rapid evolution.

Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology Abstract. The current economics of scientific publishing reveal a profound imbalance: academia pays prices far exceeding the actual costs of publication. R

Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology url: academic.oup.com/jeb/article/...

Research Associate-Fixed Term - East Lansing, Michigan, United States Position Summary The Lowry Lab at Michigan State University is searching for a postdoctoral research associate to conduct molecular and physiological experiments to understand the causes of genetic va...

I am currently searching for a new postdoctoral researcher to study the evolution, genetics, and physiology of cold acclimation and freezing tolerance in switchgrass at Michigan State University. This work will be funded by a newly funded five-year DOE grant. careers.msu.edu/jobs/researc...

Our NY area population genetics meeting is back and "upgraded", as Simons Foundation @simonsfoundation.org generously agreed to host. Please save the date: March 9, 2026. Look forward to seeing many of you from NY and beyond.

Anyone looking for a Australia-based postdoc? Like animal behaviour / coding / birds? My fantastic collaborator, Iliana Medina, is advertising a position researching bird nests:

unimelb.wd105.myworkdayjobs.com/en-GB/UoM_Ex...