Metacommunities, fitness and gradual evolution.

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Serval ID
serval:BIB_FBE1583FB56D
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Metacommunities, fitness and gradual evolution.
Journal
Theoretical population biology
Author(s)
Priklopil T., Lehmann L.
ISSN
1096-0325 (Electronic)
ISSN-L
0040-5809
Publication state
Published
Issued date
12/2021
Peer-reviewed
Oui
Volume
142
Pages
12-35
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
We analyze the evolution of a multidimensional quantitative trait in a class-structured focal species interacting with other species in a wider metacommunity. The evolutionary dynamics in the focal species as well as the ecological dynamics of the whole metacommunity is described as a continuous-time process with birth, physiological development, dispersal, and death given as rates that can depend on the state of the whole metacommunity. This can accommodate complex local community and global metacommunity environmental feedbacks owing to inter- and intra-specific interactions, as well as local environmental stochastic fluctuations. For the focal species, we derive a fitness measure for a mutant allele affecting class-specific trait expression. Using classical results from geometric singular perturbation theory, we provide a detailed proof that if the effect of the mutation on phenotypic expression is small ("weak selection"), the large system of dynamical equations needed to describe selection on the mutant allele in the metacommunity can be reduced to a single ordinary differential equation on the arithmetic mean mutant allele frequency that is of constant sign. This invariance on allele frequency entails the mutant either dies out or will out-compete the ancestral resident (or wild) type. Moreover, the directional selection coefficient driving arithmetic mean allele frequency can be expressed as an inclusive fitness effect calculated from the resident metacommunity alone, and depends, as expected, on individual fitness differentials, relatedness, and reproductive values. This formalizes the Darwinian process of gradual evolution driven by random mutation and natural selection in spatially and physiologically class-structured metacommunities.
Keywords
Biological Evolution, Models, Genetic, Phenotype, Population Dynamics, Selection, Genetic, Fitness, Invasion implies substitution, Relatedness, Selection gradient, Stochastic fluctuations, Structured populations
Pubmed
Web of science
Open Access
Yes
Create date
19/01/2021 10:43
Last modification date
09/04/2022 6:33
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