Dispersal strategies, few dominating or many coexisting: the effect of environmental spatial structure and multiple sources of mortality.

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Serval ID
serval:BIB_6F6F37CDEB22
Type
Article: article from journal or magazin.
Collection
Publications
Title
Dispersal strategies, few dominating or many coexisting: the effect of environmental spatial structure and multiple sources of mortality.
Journal
PLoS One
Author(s)
Büchi L., Vuilleumier S.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Publication state
Published
Issued date
2012
Peer-reviewed
Oui
Volume
7
Number
4
Pages
e34733
Language
english
Abstract
Interspecific competition, life history traits, environmental heterogeneity and spatial structure as well as disturbance are known to impact the successful dispersal strategies in metacommunities. However, studies on the direction of impact of those factors on dispersal have yielded contradictory results and often considered only few competing dispersal strategies at the same time. We used a unifying modeling approach to contrast the combined effects of species traits (adult survival, specialization), environmental heterogeneity and structure (spatial autocorrelation, habitat availability) and disturbance on the selected, maintained and coexisting dispersal strategies in heterogeneous metacommunities. Using a negative exponential dispersal kernel, we allowed for variation of both species dispersal distance and dispersal rate. We showed that strong disturbance promotes species with high dispersal abilities, while low local adult survival and habitat availability select against them. Spatial autocorrelation favors species with higher dispersal ability when adult survival and disturbance rate are low, and selects against them in the opposite situation. Interestingly, several dispersal strategies coexist when disturbance and adult survival act in opposition, as for example when strong disturbance regime favors species with high dispersal abilities while low adult survival selects species with low dispersal. Our results unify apparently contradictory previous results and demonstrate that spatial structure, disturbance and adult survival determine the success and diversity of coexisting dispersal strategies in competing metacommunities.
Keywords
Animals, Biostatistics, Computer Simulation, Ecosystem, Fertility, Models, Biological, Plants, Population Dynamics, Selection, Genetic, Survival Rate, Systems Biology, Time Factors
Pubmed
Web of science
Open Access
Yes
Create date
09/03/2012 16:41
Last modification date
20/08/2019 15:28
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