Document Detail


How patch configuration affects the impact of disturbances on metapopulation persistence.
MedLine Citation:
PMID:  17275866     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Séverine Vuilleumier; Chris Wilcox; Benjamin J Cairns; Hugh P Possingham
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-11-15
Journal Detail:
Title:  Theoretical population biology     Volume:  72     ISSN:  0040-5809     ISO Abbreviation:  Theor Popul Biol     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-06-12     Completed Date:  2007-12-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0256422     Medline TA:  Theor Popul Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  77-85     Citation Subset:  IM    
Affiliation:
The Ecology Centre, The University of Queensland, Brisbane, QLD 4072, Australia. severine.vuilleumier@epfl.ch
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MeSH Terms
Descriptor/Qualifier:
Computer Simulation
Ecosystem*
Extinction, Biological
Models, Biological*
Models, Statistical
Population Dynamics*
Stochastic Processes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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