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Arnaud Le Rouzic

@arnaudlerouzic.bsky.social
163 followers 146 following 21 posts

CNRS researcher (IDEEV, Université Paris-Saclay, France). Evolutionary genetics, theoretical quantitative genetics, systems biology. Associate editor at J. Evol. Biol. Bridge to my Mastodon account: @arnaudlerouzic.fediscience.org.ap.brid.gy

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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 17/08/2026
About 6 months ago, we learned the passing of our former mentor and colleague Pierre Capy at only 69. Together with my colleagues, we wrote an obituary that summarizes his career and contribution to the transposable element community, now pubished in Mobile DNA: link.springer.com/article/10.1...
link.springer.com
Pierre Capy (1957—2026) - Mobile DNA
Mobile DNA -
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Marc Robinson-Rechavi @marcrr.bsky.social · 25/06/2026
#ESEB2027 @eseb.bsky.social will be multi-hub in Munich, London, Gothenburg, and Istanbul. 😎 11-20 August 2027 eseb2027.org
eseb2027.org
ESEB 2027 – Hub Congress
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 03/06/2026
Interested in a PhD in Theoretical evolutionary ecology? A position is opened in my lab. "Theoretical and statistical modeling of eco-evolutionary feedback loops from abundance-phenotype time series" Details and application: emploi.cnrs.fr/Offres/Docto...
A simple overview of eco-evo feedback loops: the environment influences the evolution of phenotypes and genotypes, which in turn affect the population density, and thus the environment.
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 17/02/2026
Do we really understand how complex systems evolve? Based on experimental evolution in stable vs fluctuating temperature conditions, we show that adaptive mutations in the fungus Zymoseptoria tritici are (i) massively pleiotropic, and (ii) opposed to the phenotypic plasticity.
Graphical summary of the experimental evolution protocol. Strains of the fungus Zymoseptoria tritici were raised in stable cool, stable warm, or fluctuating temperature conditions for ~ 250 generations, with 2 initial genotypes are three evolutionary replicates. The transcriptome was sequenced before and after evolution at both temperatures. Illustration of the unexpected response of gene expression plasticity to the evolutionary treatment. Plasticity (i.e. the difference in expression between 23°C and 17°C) evolved more in stable conditions than in fluctuating conditions. Contergradient plasticity: gene expression in stable conditions evolved in a direction opposite to the initial plasticity, as if plasticity in the initial strains was maladaptive.
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 13/02/2026
We were all very sad to learn the death of Pierre Capy. Pierre was a professor at University Paris Saclay, in the 1990s, he started a group working on the evolutionary genomics of transposable elements; this group is still very active today. He was a great teacher, mentor, and colleague.
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Nicolas Galtier @nicolasgaltier.bsky.social · 09/12/2025
Happy to hare that the preprint I was advertising below has been published by the Journal of Evolutionary Biology: academic.oup.com/jeb/advance-... Thanks @jevbio.bsky.social for supporting responsible publishing!
academic.oup.com
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
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Benoit Nabholz @benoitevol.bsky.social · 01/12/2025
Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology url: academic.oup.com/jeb/article/...
academic.oup.com
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
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Journal of Evolutionary Biology @jevbio.bsky.social · 23/10/2025
Have you recently read about a particular field in depth? Perhaps you have just finished your PhD thesis? @jevbio.bsky.social is seeking Review Articles! Find out more about Reviews and Target Reviews at JEB here: academic.oup.com/jeb/pages/re...
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 13/10/2025
Very proud to see this work highlighted by the journal! Publishing in Evolution has always meant something special to me. Congrats to the first author Sylvain Pouzet who found the energy to keep on working on his master project during his PhD.
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 24/09/2025
Come and join our team! A 2-year postdoc position is available in our "Genome Evolution" department at Univ Paris Saclay. We want to play with phylogenetic models accounting for horizontal transfers of transposable elements. Application& details on the official portal: emploi.cnrs.fr/Offres/CDD/U...
Object: Postdoc Position 

Building a phylogenetic model for horizontal transfers of transposable elements 

A postdoctoral position (24 months) is available to work at EGCE (Gif-sur-Yvette, France, CNRS / Université Paris-Saclay) from January 2026. 

Transposable elements (TEs) are repetitive DNA sequences capable of promoting their own mobility. They are widespread across the tree of life and often represent a substantial fraction of eukaryotic genomes. Beyond their ability to invade genomes, TEs are frequently reported to undergo horizontal transfer, enabling their colonization of new hosts. However, understanding and predicting how horizontal transfers shape the distribution of TEs among species is far from straightforward. In particular, estimates of transfer rates based on documented cases are both biased and approximate, since transfers occurring close to speciation events are virtually undetectable. This project aims to develop explicit phylogenetic models of TE evolution that incorporate horizontal transfers, and to use these models to obtain statistical estimates of key evolutionary dynamics of TE families across species (e.g., horizontal transfer and extinction rates). The postdoctoral project will focus on exploring the impact of horizontal transfers on the distribution of TE presence/absence among related species, using statistical and/or computational approaches. Context

The position will be part of a 4-year collaborative project funded by the French National Agency (ANR). The research consortium gathers two departments (from Paris-Saclay university and from Université Lyon 1), and involves 7 Pls and 5 postdocs and PhD students devoted to distinct workpackages of the project. The postdoc will be based at EGCE, which is part of the Institute for Ecology and Evolution (IDEEV). The institute offers an exciting and active scientific life, it is located on the new research campus of Paris-Saclay, 35 km south of Paris. 

Relevant references

Gilbert C et al. 2018. Horizontal acquisition of transposable elements and viral sequences: patterns and consequences. Cur. Opin. Genet. Dev. 49:15-24.

Le Rouzic A et al. 2013. Reconstructing the Evolutionary History of Transposable Elements. Genome Biol. Evol. 5:77-86.

Wallau GL et al. 2016. VHICA, a New Method to Discriminate between Vertical and Horizontal Transposon Transfer: Application to the Mariner Family within Drosophila. Mol Biol Evol 33:1094-1109.

Profile

We are looking for a motivated early career theoretical biologist, with a PhD in theoretical evolutionary biology. Skills in statistics, programming, bio-informatics, and phylogenetic models will be appreciated.

Application

Formal applications (CV and cover letter) have to be deposited on the CNRS job portal https://emploi.cnrs.fr/Offres/CDD/UMR9191-ARNLER-006/Default.aspx?lang=EN.
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Genome Biology and Evolution @genomebiolevol.bsky.social · 12/09/2025
Maud Tenaillon (@maudtenaillon.bsky.social), Editor-in-Chief:
Maud Tenaillon, Editor-in-Chief of Genome Biology and Evolution: The new GBE logo illustrates how studies on genome evolution can advance our understanding of the emergence of biodiversity and the adaptation of organisms. Both are key questions for addressing current environmental challenges.
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Stu West @stuwest.bsky.social · 22/08/2025
Mike Ritchie emphasising the huge importance of supporting society journals like JEB in his ESEB presidential address, Barcelona. @eseb.bsky.social @eseb2025.bsky.social
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Journal of Evolutionary Biology @jevbio.bsky.social · 11/08/2025
We will be in the exhibition hall @eseb2025.bsky.social! ✅ Meet our editors ✅ Support your society journal @agonzalezvoyer.bsky.social @maxreuter.bsky.social @ebablab.bsky.social @vakirlis.bsky.social @arnaudlerouzic.bsky.social @francescaraffini.bsky.social @masahitotsuboi.bsky.social
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Dr Alessio Veneziano @aveneziano.bsky.social · 25/06/2025
Ethical scientific journals and where to find them....here is DAFNEE, a #database of non-profit journals in #Ecology and #Evolution #EvoBio, to choose an ethical place where to publish your next articles! (1/2) dafnee.isem-evolution.fr 🧪 #science
dafnee.isem-evolution.fr
DAFNEE, a Database of Academia Friendly jourNals in Ecology and Evolution
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Luis-Miguel Chevin @lmchev.bsky.social · 26/05/2025
Our paper on evolution of plasticity and character displacement in a fluctuating environment is now published as early view in Evolution. Check it out if you're interested in eco-evolutionary dynamics, coevolution... and plasticity of course! academic.oup.com/evolut/advan...
academic.oup.com
Evolution of plasticity and character displacement in a fluctuating environment
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Paul Doniol-Valcroze @pdvsky.bsky.social · 24/05/2025
Very glad to see the second chapter of my PhD published in JEB and feel honored that it has been picked as this month's issue "Editor's choice" and cover image! It's been a long and important team effort leading up to these results!
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 16/05/2025
Very happy to announce the publication of our latest work by my former student Sylvain Pouzet in @journal-evo.bsky.social: "Gene network topology drives the mutational landscape of gene expression". doi.org/10.1093/evol... #GeneRegulatoryNetworks #PopulationGenetics #EvolutionarySystemsBiology
A theoretical gene regulatory network, featuring 10 genes connected randomly.
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 05/05/2025
Job ad: we are looking for a IT/bioinformatician for 12 months, located in the Paris-Saclay campus: emploi.cnrs.fr/Offres/CDD/U... In French: nous cherchons un ingénieur en bio-informatique (CDD 12 mois) pour de la maintenance serveurs, formation, et assistance utilisateurs.
emploi.cnrs.fr
Portail Emploi CNRS - Offre d'emploi - Ingénieur d’études en bio-informatique (H/F)
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Journal of Evolutionary Biology @jevbio.bsky.social · 09/04/2025
Why publish in JEB? ✅ Society-owned and not-for-profit model ✅ Dedicated submission support - in-house Managing Editor ✅ Range of article types ✅ Modern Open Science policies - our own Data Editor ✅ Large editorial board with wide-range of expertise #societyjournal @eseb.bsky.social
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Arnaud Le Rouzic @arnaudlerouzic.bsky.social · 07/03/2025
Several thousand people today at #standupforscience2025 in Paris.
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Jeffrey Ross-Ibarra @jrossibarra.bsky.social · 17/02/2025
Wow. This is sooo good. Echoing @urbanevol.bsky.social this user’s manual for Ne should be required reading for popgen and conservation genetics folks. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
The Idiot's Guide to Effective Population Size
This is a reference manual for the elegant, yet hideously complex concept of effective population size (Ne), inspired by a classic, self-published manual of automotive repair ‘for the compleat idiot’...
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Nikos Vakirlis @vakirlis.bsky.social · 11/02/2025
Happy to announce that I have joined the editorial board of the Journal of Evolutionary Biology @jevbio.bsky.social as an Associate Editor. Hope to contribute as much as I can to the journal and to @eseb.bsky.social .
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Amaury Lambert @yruama.bsky.social · 19/01/2025
SpringerNature keeps on creating new outlet after new outlet... Seems like nothing can stop them. Just like that joke of a guy putting coins into the soda vending machine: "So long as I'm winning, I'm playing"... But who pays? We researchers are the fools and we seem to like it.
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