Geometric Insights into Evolutionary Rescue Dynamics in a Two-Deme Model.

IF 3.1 2区 环境科学与生态学 Q2 ECOLOGY
Evolution Pub Date : 2025-02-11 DOI:10.1093/evolut/qpaf021
Azadeh Mohammadi, Paulo R A Campos
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引用次数: 0

Abstract

Understanding evolutionary rescue mechanisms in fragmented populations is crucial in the context of rapidly changing environments. This study employs analytical derivations and simulations within a two-deme metapopulation model using Fisher's geometric model (FGM) framework. We explore the impacts of abrupt environmental changes on two subpopulations that lead to distinct phe- notypic optima. We determine the probability density of distances between these optima through analytical derivations. This enables us to calculate the inter- section volume of the rescue domains of two subpopulations in the phenotypic space. This approach also allows us to assess the fixation probability of muta- tions that concurrently rescue both subpopulations and identify the domain of one-step rescue mutations. Our findings reveal that the likelihood of joint evolu- tionary rescue diminishes with increasing dimensionality of the phenotypic space, posing significant challenges for species with complex trait configurations. The study underscores the importance of genetic variation due to de novo mutations, local adaptation, and migration rates. These insights enhance our understanding of the factors that govern the adaptive potential of fragmented populations in response to severe environmental disturbances.

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来源期刊
Evolution
Evolution 环境科学-进化生物学
CiteScore
5.00
自引率
9.10%
发文量
0
审稿时长
3-6 weeks
期刊介绍: Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.
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