ArticleEvolution; international journal of organic evolution2021
Polygenic local adaptation in metapopulations: A stochastic eco-evolutionary model.
Article in Evolution; international journal of organic evolution, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed.
- Migration Thresholds Govern Allele Collapse Under Repeated Gene Flooding.Ecology and evolution · 2026Article
- Article
- Genetic Drift Shapes the Evolution of a Highly Dynamic Metapopulation.Molecular biology and evolution · 2022Article
- Perturbation responses in co-evolved model meta-communities.Ecology and evolution · 2022Article
- Reproductive isolation via polygenic local adaptation in sub-divided populations: Effect of linkage disequilibria and drift.PLoS genetics · 2022Article
- Selection on modifiers of genetic architecture under migration load.PLoS genetics · 2022Article
- Inversions and parallel evolution.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Review
- The costs and benefits of dispersal in small populations.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Understanding the biology of species' ranges: when and how does evolution change the rules of ecological engagement?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- The response of a metapopulation to a changing environment.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Genetic load and extinction in peripheral populations: the roles of migration, drift and demographic stochasticity.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Dynamic maximum entropy provides accurate approximation of structured population dynamics.PLoS computational biology · 2021Article
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3 authors.
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Abstract
This article analyzes the conditions for local adaptation in a metapopulation with infinitely many islands under a model of hard selection, where population size depends on local fitness. Each island belongs to one of two distinct ecological niches or habitats. Fitness is influenced by an additive trait which is under habitat-dependent directional selection. Our analysis is based on the diffusion approximation and accounts for both genetic drift and demographic stochasticity. By neglecting linkage disequilibria, it yields the joint distribution of allele frequencies and population size on each island. We find that under hard selection, the conditions for local adaptation in a rare habitat are more restrictive for more polygenic traits: even moderate migration load per locus at very many loci is sufficient for population sizes to decline. This further reduces the efficacy of selection at individual loci due to increased drift and because smaller populations are more prone to swamping due to migration, causing a positive feedback between increasing maladaptation and declining population sizes. Our analysis also highlights the importance of demographic stochasticity, which exacerbates the decline in numbers of maladapted populations, leading to population collapse in the rare habitat at significantly lower migration than predicted by deterministic arguments.
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