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Evolution of density-and patch-size-dependent dispersal rates
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-49659
- Based on a marginal value approach, we derive a nonlinear expression for evolutionarily stable (ES) dispersal rates in a metapopulation with global dispersal. For the general case of density-dependent population growth, our analysis shows that individual dispersal rates should decrease with patch capacity and-beyond a certain threshold-increase with population density. We performed a number of spatially explicit, individual-based simulation experiments to test these predictions and to explore further the relevance of variation in the rate ofBased on a marginal value approach, we derive a nonlinear expression for evolutionarily stable (ES) dispersal rates in a metapopulation with global dispersal. For the general case of density-dependent population growth, our analysis shows that individual dispersal rates should decrease with patch capacity and-beyond a certain threshold-increase with population density. We performed a number of spatially explicit, individual-based simulation experiments to test these predictions and to explore further the relevance of variation in the rate of population increase, density dependence, environmental fluctuations and dispersal mortality on the evolution of dispersal rates. They confirm the predictions of our analytical approach. In addition, they show that dispersal rates in metapopulations mostly depend on dispersal mortality and inter-patch variation in population density. The latter is dominantly driven by environmental fluctuations and the rate of population increase. These conclusions are not altered by the introduction of neighbourhood dispersal. With patch capacities in the order of 100 individuals, kin competition seems to be of negligible importance for ES dispersal rates except when overall dispersal rates are low.…
Autor(en): | Hans J. Poethke, Thomas Hovestadt |
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URN: | urn:nbn:de:bvb:20-opus-49659 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften |
Sprache der Veröffentlichung: | Englisch |
Erscheinungsjahr: | 2002 |
Originalveröffentlichung / Quelle: | In: Proceedings of the Royal Society of London Series B - Biological Sciences (2002) 269, 1491, 637-645 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
Normierte Schlagworte (GND): | Metapopulation; Dichte; Verteilung |
Freie Schlagwort(e): | ESS; density-dependent dispersal; dispersal rate; individual based model (IBM); metapopulation; patch size |
Datum der Freischaltung: | 27.07.2010 |
Lizenz (Deutsch): | Deutsches Urheberrecht |