Evolution of dispersal under a fecundity-dispersal trade-off

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Weigang , H C & Kisdi , E 2015 , ' Evolution of dispersal under a fecundity-dispersal trade-off ' , Journal of Theoretical Biology , vol. 371 , pp. 145-153 . https://doi.org/10.1016/j.jtbi.2015.02.013

Title: Evolution of dispersal under a fecundity-dispersal trade-off
Author: Weigang, Helene C.; Kisdi, Eva
Other contributor: University of Helsinki, Department of Mathematics and Statistics
University of Helsinki, Department of Mathematics and Statistics
Date: 2015-04-21
Language: eng
Number of pages: 9
Belongs to series: Journal of Theoretical Biology
ISSN: 0022-5193
DOI: https://doi.org/10.1016/j.jtbi.2015.02.013
URI: http://hdl.handle.net/10138/262547
Abstract: Resources invested in dispersal structures as well as time and energy spent during transfer may often decrease fecundity. Here we analyse an extended version of the Hamilton-May model of dispersal evolution, where we include a fecundity-dispersal trade-off and also mortality between competition and reproduction. With adaptive dynamics and critical function analysis we investigate the evolution of dispersal strategies and ask whether adaptive diversification is possible. We exclude evolutionary branching for concave trade-offs and show that for convex trade-offs diversification is promoted in a narrow parameter range. We provide theoretical evidence that dispersal strategies can monotonically decrease with increasing survival during dispersal. Moreover, we illustrate the existence of two alternative attracting dispersal strategies. The model exhibits fold bifurcation points where slight changes in survival can lead to evolutionary catastrophes. (C) 2015 Elsevier Ltd. All rights reserved.
Subject: Adaptive dynamics
Critical function analysis
Evolutionary branching
Life history
Emigration
CONDITION-DEPENDENT DISPERSAL
LIFE-HISTORY
STRUCTURED METAPOPULATIONS
LOCAL ADAPTATION
KIN COMPETITION
SEED SIZE
WINGLESS MORPHS
DYNAMICS
STRATEGIES
DISTANCE
111 Mathematics
1181 Ecology, evolutionary biology
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