The influence of environmental spatial structure on the life history traits and diversity of species in a metacommunity

Détails

ID Serval
serval:BIB_C40AC977B68F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The influence of environmental spatial structure on the life history traits and diversity of species in a metacommunity
Périodique
Ecological Modelling
Auteur(s)
Büchi L., Christin P.A., Hirzel A.
ISSN
0304-3800
Statut éditorial
Publié
Date de publication
11/2009
Peer-reviewed
Oui
Volume
220
Numéro
21
Pages
2857-2864
Langue
anglais
Résumé
Several models have been proposed to understand how so many species can coexist in ecosystems. Despite evidence showing that natural habitats are often patchy and fragmented, these models rarely take into account environmental spatial structure. In this study we investigated the influence of spatial structure in habitat and disturbance regime upon species' traits and species' coexistence in a metacommunity. We used a population-based model to simulate competing species in spatially explicit landscapes. The species traits we focused on were dispersal ability, competitiveness, reproductive investment and survival rate. Communities were characterized by their species richness and by the four life-history traits averaged over all the surviving species. Our results show that spatial structure and disturbance have a strong influence on the equilibrium life-history traits within a metacommunity. In the absence of disturbance, spatially structured landscapes favour species investing more in reproduction, but less in dispersal and survival. However, this influence is strongly dependent on the disturbance rate, pointing to an important interaction between spatial structure and disturbance. This interaction also plays a role in species coexistence. While spatial structure tends to reduce diversity in the absence of disturbance, the tendency is reversed when disturbance occurs. In conclusion, the spatial structure of communities is an important determinant of their diversity and characteristic traits. These traits are likely to influence important ecological properties such as resistance to invasion or response to climate change, which in turn will determine the fate of ecosystems facing the current global ecological crisis.
Mots-clé
Spatial autocorrelation, Community ecology, Biodiversity, Species traits, Trade-off, Fragmentation
Web of science
Création de la notice
06/08/2009 8:51
Dernière modification de la notice
20/08/2019 15:39
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