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Greg Walter

@gmwalter.bsky.social
81 followers 66 following 3 posts

Ecological and evolutionary genetics, mainly with plants Lecturer & ARC Future Fellow, University of Tasmania Otherwise cycling, camping and birding!

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Reposted by Greg Walter
David Berger @dbergerbiol.bsky.social · 6h
PhD-position ALERT! Interested in the genomics of local adaptation and the evolution of niche breadth? 🪲🧬🪲🧬🪲🧬🪲🧬🪲🧬 Come join me and @gmkov.bsky.social at @animecol-uu.bsky.social, Uppsala University, by applying here: uu.varbi.com/en/what:job/... Deadline 1st of November!
uu.varbi.com
PhD-student in Evolutionary and Ecological Genetics
Do you want to conduct frontier research in an outstanding environment within evolutionary biology at Sweden’s largest faculty of science and technology? The Department of Ecology and Genetics at Up
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Erik Postma @erikpostma.bsky.social · 23/09/2026
Delighted to see this mammoth effort led by @sevans.bsky.social, together with @mevisser.bsky.social, Arie van Noordwijk and Henri Bouwmeester out in @plosbiology.org.
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Haoran Cai @haorancai.bsky.social · 27/08/2026
Now out @molbioevol.bsky.socialGenetic correlations summarize how traits covary, but they can hide different underlying architectures. Distinguishing those architectures can reveal distinct mechanisms generating—and potentially constraining—trait–trait relationships. academic.oup.com/mbe/advance-...
academic.oup.com
Consistent and idiosyncratic pleiotropy in shaping genetic correlations
Abstract. Pleiotropy, the phenomenon where a single mutation influences multiple phenotypic traits, creates genetic correlations that can constrain evoluti
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David Lowry @davidlowry.bsky.social · 18/08/2026
Awesome new work out of the lab on the mechanisms of oceanic salt spray adaptations in plants. Big thanks to NSF for funding this research.
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Simon Evans @sevans.bsky.social · 16/07/2026
What are the conferences/meetings that plant evolutionary ecologists in the UK attend? It seems silly for us to be siloed by taxonomy, so I’m keen to explore how we can encourage greater discourse. Please RT.
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John Stinchcombe @johnstinchcombe.bsky.social · 27/07/2026
This is thoughtful and worth your time.
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Berna Devezer @devezer.bsky.social · 25/07/2026
i see a particular grievance regularly on here: "a paper I reviewed came back to me at a diff journal. the authors didn't address my concerns at all." seriously what are you doing accepting to review the same paper? let people breathe & have another chance. let them decide what's worth addressing.
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Mario Vallejo-Marin @nicrodemo.bsky.social · 21/07/2026
Very happy to see this study out! The transition from outcrossing to selfing involve convergent patterns of flower trait covariation academic.oup.com/aob/article/...
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Simon Fisher @profsimonfisher.bsky.social · 20/05/2026
“Academic science is not only about productivity but also deep understanding, creative solutions & training critical thinkers as next generation of researchers. Now is the time for our community to evaluate whether AI products help or hinder these.“ @lmesseri.bsky.social & @mjcrockett.bsky.social🧪👇
nature.com
The uncritical adoption of AI in science is alarming — we urgently need guard rails
Artificial intelligence is rapidly accelerating scientific output, but risks narrowing inquiry, weakening judgement and undermining how scientists are trained.
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Scott P. Egan @scottpegan.bsky.social · 07/05/2026
Botanical parasitism of an insect by a parasitic plant: Current Biology www.cell.com/current-biol...
cell.com
Botanical parasitism of an insect by a parasitic plant
Egan et al. report the discovery of a new trophic interaction in nature whereby a parasitic plant attacks multiple species of insects that manipulate plant tissue when the two co-occur on a shared pri...
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Antoine Perrier @perrierecoevo.bsky.social · 07/05/2026
New paper out in Evolution Letters! @evolletters.bsky.social We explore the legacy of past warming at the rear edge of Campanula americana. Spoiler alert: we did not find higher drift load as often expected at the rear edge, but strong local adaptation! doi.org/10.1093/evle...
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Evolution Letters @evolletters.bsky.social · 06/04/2026
Fast developers in native habitats show higher survival in new environments suggesting development time forecasts adaptive potential in Sicilian daisies. By @gmwalter.bsky.social and @jonbridle.bsky.social doi.org/10.1093/evle... @gmwalter.bsky.social Image credit A Moro at Wikimedia
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Evolution Letters @evolletters.bsky.social · 21/04/2026
Now out in Evolution Letters - Ongoing adaptation of the partridge pea boosts fitness across generations and helps buffer populations against harmful environmental change. By Ruth Shaw et al. Image credit Patrick Alexander doi.org/10.1093/evle...
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Aaditya Narasimhan @aaditya320.bsky.social · 13/04/2026
So happy to see the 2nd chapter of my PhD out! doi.org/10.1093/evol... Here, we studied populations sampled from their local elevational edges and centers on mountain slopes, and characterised the variation in G-matrices (comprised of growth and leaf investment traits) among these populations. 1/5
doi.org
Variation in the genetic architecture of ecologically relevant traits along elevational gradients
Abstract. Species are confined within spatial boundaries, which may be determined by various factors. An understudied one is the genetic non-independence o
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Tuna @antea04.bsky.social · 10/04/2026
I'm a data scientist @ourworldindata.org and I need help from a botanist or someone local to Kyoto, Japan! 🌸 We present one of the world’s longest climate records: 1,200 years of peak cherry blossom dates in Kyoto. The researcher who maintained it, Prof. Yasuyuki Aono, sadly passed away last year.
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Lucrezia Laccetti @lucrezialaccetti.bsky.social · 11/04/2026
New Evolution Digest out! 🎉 Does balancing selection maintain fitness variance? Yes, when drift and environmental fluctuations are in play! I discuss why this matters for plant adaptation to climate change. 🌱🌡️ doi.org/10.1093/evol... @sse-evolution.bsky.social @journal-evo.bsky.social
doi.org
Digest: Drift and environmental fluctuations reveal fitness variance under balancing selection
Abstract. Why natural populations harbor high additive genetic variance for fitness remains an evolutionary puzzle. Connallon and Czuppon (2026) show that
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Greg Walter @gmwalter.bsky.social · 07/04/2026
Nice to see this out! Thanks to all the coauthors. Really appreciate the work from the editors and reviewers at Evolution Letters.
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Marcel E. Visser @mevisser.bsky.social · 25/03/2026
The breeding season 2026 has started, our 72nd breeding season!
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Beth Hoots @whatahoot.bsky.social · 19/03/2026
Excited to share my second thesis chapter is published today as part of this issue 🎉 Exploring variability in physiological traits between (and within) individual fish can help us understand how metabolic performance and growth rates change in response to factors like warming temperatures 🔥 🧪🐟🦑
doi.org
Exploring metabolism–growth relationships within and across individual fish
Abstract. Differences in growth rate and metabolism between individual animals can influence survival, reproduction and competitive social dynamics during
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Dustin Marshall @djmmeeg.bsky.social · 13/03/2026
Fish will have to adapt to a warming world, what will that adaptation do to fisheries yields? We answer that question today in Science. I’ll summarise our findings very briefly in this thread www.science.org/doi/epdf/10....
science.org
Evolutionary adaptation to global change reduces sustainable fisheries yields
Global warming is altering the fisheries that underpin food security, but projections of these impacts generally exclude evolutionary processes. We describe a model that forecasts how fish will adapt ...
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Jenn Coughlan @jenncoughlan.bsky.social · 13/03/2026
What an amazing feat- congrats to everyone!!!!!!!!!! www.science.org/doi/10.1126/...
science.org
Rapid evolution predicts demographic recovery after extreme drought
Populations that are declining as a result of climate change may need to evolve to persist. Although evolutionary rescue has been demonstrated in theory and in the laboratory, its relevance to natural...
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Greg Walter @gmwalter.bsky.social · 15/01/2026
Happy to share out latest work in Ecology Letters! We show how how genetic differences in plasticity determine fitness at different environmental scales from native to novel elevations. @jonbridle.bsky.social @jameswclark.bsky.social Many thanks to the reviewers! doi.org/10.1111/ele....
Photo of a Senecio daisy in front of a stone hut
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Jill M. Love, PhD 🏳️‍🌈 @jillmlove.bsky.social · 22/12/2025
Preprint up now! With @ferrisifolius.bsky.social, we found positive selection on leaf shape plasticity across the altitudinal range of the cutleaf monkeyflower. This experiment was a HUGE personal undertaking. If you give it a read, I’d love to hear your thoughts! www.biorxiv.org/content/10.6...
biorxiv.org
Phenotypic plasticity is broadly adaptive across an elevation gradient in the Cutleaf Monkeyflower
Phenotypic plasticity is a key mechanism by which organisms can cope with environmental heterogeneity, but its evolutionary consequences depend on how plastic responses align with the broader adaptive...
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Aaditya Narasimhan @aaditya320.bsky.social · 03/09/2025
A bit late, but really happy to see my first PhD paper out! We studied trait-elevation relationships in multiple traits spanning growth, size (both above and belowground) and leaf economics to understand whether these align at within- and among-species scales. academic.oup.com/evlett/advan...
academic.oup.com
Alignment across taxonomic levels in strategies rather than in traits along elevational gradients
Abstract. Trait variation along environmental gradients can indicate the different strategies that organisms have evolved in response to environmental hete
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Mark Spa @markspa.bsky.social · 03/09/2025
1. My first ever paper is out! With @euantheyoung.bsky.social @lummaalab.bsky.social @erikpostma.bsky.social @hannahdugdale.bsky.social How do older siblings, and their sex and age, affect the survival of younger siblings? Find out by checking below. royalsocietypublishing.org/doi/full/10....
royalsocietypublishing.org
Age- and sex-dependent associations between the number of older siblings and early-life survival in pre-industrial humans | Proceedings of the Royal Society B: Biological Sciences
Siblings are an important part of an individual’s early-life environment and may therefore play an important role in shaping an individual’s survival. The quantification of sibling effects on survival is challenging, however, especially in long-lived ...
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Josh Luke Davis 🏳️‍🌈 @joshlukedavis.com · 03/09/2025
woah this is genuinely, utterly WILD Ant queens of one species produce males of another species, so she can then mate with them and produce hybrid workers! This is so gloriously weird I can't quite compute it 🤯🧪🐜 www.nature.com/articles/d41...
nature.com
‘Almost unimaginable’: these ants are different species but share a mother
Ant queens of one species clone ants of another to create hybrid workers that do their bidding.
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Greg Walter @gmwalter.bsky.social · 04/09/2025
First post here 😬 .. hi everyone! Our new paper is the first from my short foray into a non-plant system! [don't worry, back to plants!] We show how clinal patterns in climate tolerance and plasticity are environment-dependent! doi.org/10.1098/rspb... Thanks to ProcB and the reviewers!
doi.org
Variation in temperature but not diet determines the stability of latitudinal clines in tolerance traits and their plasticity | Proceedings of the Royal Society B: Biological Sciences
Latitudinal clines are routinely used as evidence of adaptation across broad climatic gradients. However, if environmental variation influences the strength of latitudinal clines, then clinal patterns...
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Sam Yeaman @samyeaman.bsky.social · 20/08/2025
I'm looking to recruit a PhD student to study patterns of local adaptation and introgression across the spruce hybrid zone in the Rockies near Calgary. Projects can include field work, bioinformatics, pop gen theory, or comparison to plant/ conifer species yeamanlab.weebly.com/uploads/5/7/...
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John Stinchcombe @johnstinchcombe.bsky.social · 20/08/2025
and, @stuartmcdaniel.bsky.social ! My favorite part of this paper: the collaboration started after I sent Meng a biorxiv preprint from Stuart's lab.. She contacted him with questions about that work, and the collaboration grew from there.
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Emily Josephs @emjo.bsky.social · 21/07/2025
Sophie Buysse's paper on short stamen loss in Arabipsis is published in this month's Evolution issue!! academic.oup.com/evolut/artic... @journal-evo.bsky.social
academic.oup.com
Evaluating the roles of drift and selection in trait loss along an elevational gradient
The evolutionary mechanisms underlying loss or retention of traits that have lost function are poorly understood. Short stamens in Arabidopsis thaliana pro
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Arvid Ågren @arvidagren.bsky.social · 20/06/2025
John Maynard Smith on adaptationist cleaning up their act following the spandrels paper. From Dinosaur Dilemmas, NYRB April 25, 1991.
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Jenn Coughlan @jenncoughlan.bsky.social · 19/06/2025
SO excited for #Evol2025 @sse-evolution.bsky.social!!!!!!! The Coughlan lab has a stellar line up of folks giving talks (on lab projects and beyond!)- please check them out! We welcome all feedback and would love to hear from you!!!
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Emily Josephs @emjo.bsky.social · 20/06/2025
I'm so excited to be at #evol2025!! Lab talks: "Adaptive and maladaptive plasticity in leaf number among populations of A. thaliana" from Sophie Buysse at 9:30 in Sunday in Adaptation V
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Susana Wadgymar🌿🔬 @smwadgymar.bsky.social · 18/06/2025
Shout out to this excellent & thorough paper: Leaf venation: structure, function, development, evolution, ecology and applications in the past, present and future A compendium, really, especially if you include the supplemental info. #PlantScience 🧪 nph.onlinelibrary.wiley.com/doi/10.1111/...
nph.onlinelibrary.wiley.com
Leaf venation: structure, function, development, evolution, ecology and applications in the past, present and future
The design and function of leaf venation are important to plant performance, with key implications for the distribution and productivity of ecosystems, and applications in paleobiology, agriculture a....
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Mario Vallejo-Marin @nicrodemo.bsky.social · 17/06/2025
How many times have buzz pollinated flowers evolved? Read the latest version of our preprint here www.biorxiv.org/content/10.1... @draverbee.bsky.social @roszenil.bsky.social
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Brian J. Enquist @bjenquist.bsky.social · 17/06/2025
Please pass along - postdoc position! with our working group on #FunctionalTraits and rarity. This is part of the FREE (Functional Rarity in Ecology and Evolution) working group led by Cyrille Violle in Montpellier France 🧪🌐🌾 emploi.cnrs.fr/Offres/CDD/U...
emploi.cnrs.fr
Portail Emploi CNRS - Offre d'emploi - Offre de post-doctorat en écologie (H/F)
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Emily Josephs @emjo.bsky.social · 12/06/2025
Hey, Miles' @milesroberts.bsky.social beautiful paper showing that sequence diversity missed by standard methods contributes to Lewontin's paradox is officially published in @evolletters.bsky.social. academic.oup.com/evlett/advan...
academic.oup.com
k-mer-based diversity scales with population size proxies more than nucleotide diversity in a meta-analysis of 98 plant species
Abstract. A key prediction of neutral theory is that the level of genetic diversity in a population should scale with population size. However, as was note
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Moi Expósito-Alonso (MOILAB) @mexpositoalonso.bsky.social · 30/05/2025
Super excited to release a huge evolution project on the works for many years: Evolution experiments synchronized across climates to understand rapid adaptation Preprint: doi.org/10.1101/2025... All data available: www.grene-net.org/data #MOILAB @ucberkeleyofficial.bsky.social @hhmi.org 🧵👇
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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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ARC Centre of Excellence for Plant Success @coeplantsuccess.bsky.social · 22/05/2025
📢 New publication 'Multi-response #phylogenetic mixed #models: concepts and application' by Ben Halliwell, Barbara Holland and Luke Yates in Biological Reviews 🧪 doi.org/10.1111/brv....
doi.org
Multi‐response phylogenetic mixed models: concepts and application
The scale and resolution of trait databases and molecular phylogenies is increasing rapidly. These resources permit many open questions in comparative biology to be addressed with the right statistic...
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David Berger @dbergerbiol.bsky.social · 16/05/2025
Finally out: Predicting adaptation to climate warming www.nature.com/articles/s41... We find that there are many genomic routes to heat-adaptation, but this can also make genomic data of limited value for prediction. A tour de force by @denovorego.bsky.social , with @stelkens.bsky.social.
nature.com
Repeatability of evolution and genomic predictions of temperature adaptation in seed beetles - Nature Ecology & Evolution
The authors compare genomic and phenotypic changes between genetic backgrounds of seed beetles evolved at hot or cold temperatures. Despite phenotypic changes being more rapid and predictable at hot t...
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Daniel Noble @danielwanoble.bsky.social · 08/04/2025
Very happy and humbled to have received this award. A huge thanks to all my wonderful colleagues @scienceanu.bsky.social and abroad who made this possible!
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Jenn Coughlan @jenncoughlan.bsky.social · 16/04/2025
Currently developing a workshop for postdocs on mentoring and managing in EEB! What are some topics/pieces of advice you'd have wanted to learn about as a postdoc?
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Erik Postma @erikpostma.bsky.social · 15/04/2025
Last year I posted too early and had to retract my post 🫣, but now that all @niooknaw.bsky.social @animalecol-nioo.bsky.social nest boxes on #Vlieland have been checked, we know for sure that it is - yet again - a very early start of the breeding season! @uniexecec.bsky.social @sevans.bsky.social
A plot the date of the first great tit egg on Vlieland against year showing 2025 is the third-earliest year since 1955.
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Pierre de Villemereuil @pdevillemereuil.bsky.social · 08/04/2025
👋 Interested in working on the evolution of genetic architecture 🧬 of complex traits using linked-read sequencing of thousands of common lizards 🦎 from a wild population and common garden experiment? #evolution #genetics Well, I have a PhD offer for you 👇 devillemereuil.legtux.org/erc-funded-p...
devillemereuil.legtux.org
ERC-funded PhD position available – Pierre de Villemereuil
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John Stinchcombe @johnstinchcombe.bsky.social · 26/03/2025
Interested in other approaches to measuring selection on gene expression? The incomparable John Kelly and I have written a perspective piece describing why one might want to measure selection on gene expression, and exploring a few ways one might use to do it.
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ᐯIᑕTOᖇ ᑎIᘔET, ᗰᗪ @nizet.bsky.social · 29/03/2025
CONVERGENT EVOLUTION is the independent development of similar traits or features in distantly related or unrelated organisms, often occurring when they occupy similar ecological niches or face similar environmental pressures 🦉 🍏
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Seema Sheth @seemasheth.bsky.social · 28/03/2025
Excited for @kalebgoff.bsky.social's 1st dissertation chapter to be out w co-authors M Oldfather, J Nachlinger, B Smithers, @mikoontz.bsky.social, J & C Bishop & M Burke. Limited Directional Change in Mountaintop Plant Communities over 19 years in Western North America doi.org/10.1002/ecs2...
Photo of Primula parryi, a robust alpine plant with magenta flowers, with mountains, clouds, and sky visible in the backgroundPhoto of Polemonium chartaceum, a small alpine plant with purple flowers, with mountains, snow, and blue sky visible in the backgroundA photo of two plant ecologists standing on the top of White Mountain peak and holding a sign that says "White Mountain Pk. 14,252'". The top of the mountain is rocky and there are many clouds in the sky.
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Jannice Friedman @jannicefriedman.bsky.social · 20/03/2025
A greenhouse full of one’s first true love always raises the spirits!!! #ragweed #iamabotanist #botany #plantbiology @isabeaulewis.bsky.social 🌾🧪
Ragweed plants (Ambrosia artemisiifolia) growing in the greenhouse
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