Variability in Dispersal Syndromes Is a Key Driver of Metapopulation Dynamics in Experimental Microcosms - Archive ouverte HAL Access content directly
Journal Articles American Naturalist Year : 2019

Variability in Dispersal Syndromes Is a Key Driver of Metapopulation Dynamics in Experimental Microcosms

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Abstract

Evolutionary ecology studies have increasingly focused on the impact of intraspecific variability on population processes. However, the role such variation plays in the dynamics of spatially structured populations and how it interacts with environmental changes remains unclear. Here we experimentally quantify the relative importance of intraspecific variability in dispersal-related traits and spatiotemporal variability of environmental conditions for the dynamics of two-patch metapopulations using clonal genotypes of a ciliate in connected microcosms. We demonstrate that in our simple two-patch microcosms, differences among genotypes are at least as important as spatiotemporal variability of resources for metapopulation dynamics. Furthermore, we show that an important proportion of this effect results from variability of dispersal syndromes. These syndromes can therefore be as important for metapopulation dynamics as spatiotemporal variability of environmental conditions. This study demonstrates that intraspecific variability in dispersal syndromes can be key in the functioning of metapopulations facing environmental changes.
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hal-02347855 , version 1 (26-11-2020)

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Staffan Jacob, Alexis Chaine, Michèle Huet, Jean Clobert, Delphine Legrand. Variability in Dispersal Syndromes Is a Key Driver of Metapopulation Dynamics in Experimental Microcosms. American Naturalist, 2019, 194 (5), pp.613-626. ⟨10.1086/705410⟩. ⟨hal-02347855⟩
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