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

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Ressource 1Télécharger: BIB_6F6F37CDEB22.P001.pdf (1555.81 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_6F6F37CDEB22
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Dispersal strategies, few dominating or many coexisting: the effect of environmental spatial structure and multiple sources of mortality.
Périodique
PLoS One
Auteur(s)
Büchi L., Vuilleumier S.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
7
Numéro
4
Pages
e34733
Langue
anglais
Résumé
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.
Mots-clé
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
Oui
Création de la notice
09/03/2012 16:41
Dernière modification de la notice
08/05/2019 20:12
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