Joint evolution of dispersal and connectivity

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http://hdl.handle.net/10138/320483

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Karisto , P & Kisdi , È 2019 , ' Joint evolution of dispersal and connectivity ' , Evolution , vol. 73 , no. 12 , pp. 2529–2537 . https://doi.org/10.1111/evo.13866

Title: Joint evolution of dispersal and connectivity
Author: Karisto, Petteri; Kisdi, Èva
Contributor: University of Helsinki, Department of Mathematics and Statistics
University of Helsinki, Department of Mathematics and Statistics
Date: 2019-11-05
Language: eng
Number of pages: 9
Belongs to series: Evolution
ISSN: 0014-3820
URI: http://hdl.handle.net/10138/320483
Abstract: Functional connectivity, the realized flow of individuals between the suitable sites of a heterogeneous landscape, is a prime determinant of the maintenance and evolution of populations in fragmented habitats. While a large body of literature examines the evolution of dispersal propensity, it is less known how evolution shapes functional connectivity via traits that influence the distribution of the dispersers. Here, we use a simple model to demonstrate that, in a heterogeneous environment with clustered and solitary sites (i.e., with variable structural connectivity), the evolutionarily stable population contains strains that are strongly differentiated in their pattern of connectivity (local vs. global dispersal), but not necessarily in the fraction of dispersed individuals. Also during evolutionary branching, selection is disruptive predominantly on the pattern of connectivity rather than on dispersal propensity itself. Our model predicts diversification along a hitherto neglected axis of dispersal strategies and highlights the role of the solitary sites-the more isolated and therefore seemingly less important patches of habitat-in maintaining global dispersal that keeps all sites connected.
Subject: Adaptive dynamics
dispersal
DYNAMICS
FITNESS PROXY
GENETICS
LEADS
METAPOPULATION
POLYMORPHISM
SINGULAR STRATEGIES
SIZE
TRAITS
dispersal polymorphism
evolutionary branching
kin competition
patch connectivity
1181 Ecology, evolutionary biology
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