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

Détails

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Etat: Public
Version: de l'auteur⸱e
ID Serval
serval:BIB_9DC2B80F0610
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
How patch configuration affects the impact of disturbances on metapopulation persistence.
Périodique
Theoretical Population Biology
Auteur⸱e⸱s
Vuilleumier S., Wilcox C., Cairns B.J., Possingham H.P.
ISSN
0040-5809 (Print)
ISSN-L
0040-5809
Statut éditorial
Publié
Date de publication
2007
Peer-reviewed
Oui
Volume
72
Numéro
1
Pages
77-85
Langue
anglais
Résumé
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.
Mots-clé
Computer Simulation, Ecosystem, Extinction, Biological, Models, Biological, Models, Statistical, Population Dynamics, Stochastic Processes
Pubmed
Web of science
Open Access
Oui
Création de la notice
15/07/2008 13:10
Dernière modification de la notice
20/08/2019 15:04
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