How patch configuration affects the impact of disturbances on metapopulation persistence.

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Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
How patch configuration affects the impact of disturbances on metapopulation persistence.
Journal
Theoretical Population Biology
Author(s)
Vuilleumier S., Wilcox C., Cairns B.J., Possingham H.P.
ISSN
0040-5809 (Print)
ISSN-L
0040-5809
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
72
Number
1
Pages
77-85
Language
english
Abstract
Disturbances affect metapopulations directly through reductions in population size and indirectly through habitat modification. We consider how metapopulation persistence is affected by different disturbance regimes and the way in which disturbances spread, when metapopulations are compact or elongated, using a stochastic spatially explicit model which includes metapopulation and habitat dynamics. We discover that the risk of population extinction is larger for spatially aggregated disturbances than for spatially random disturbances. By changing the spatial configuration of the patches in the system--leading to different proportions of edge and interior patches--we demonstrate that the probability of metapopulation extinction is smaller when the metapopulation is more compact. Both of these results become more pronounced when colonization connectivity decreases. Our results have important management implication as edge patches, which are invariably considered to be less important, may play an important role as disturbance refugia.
Keywords
Computer Simulation, Ecosystem, Extinction, Biological, Models, Biological, Models, Statistical, Population Dynamics, Stochastic Processes
Pubmed
Web of science
Open Access
Yes
Create date
15/07/2008 13:10
Last modification date
20/08/2019 15:04
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