Confronting the Paradox of Enrichment to the Metacommunity Perspective - HAL-SDE - Sciences de l'environnement Accéder directement au contenu
Article Dans Une Revue PLoS ONE Année : 2013

Confronting the Paradox of Enrichment to the Metacommunity Perspective

Résumé

Resource enrichment can potentially destabilize predator-prey dynamics. This phenomenon historically referred as the "paradox of enrichment" has mostly been explored in spatially homogenous environments. However, many predator-prey communities exchange organisms within spatially heterogeneous networks called metacommunities. This heterogeneity can result from uneven distribution of resources among communities and thus can lead to the spreading of local enrichment within metacommunities. Here, we adapted the original Rosenzweig-MacArthur predator-prey model, built to study the paradox of enrichment, to investigate the effect of regional enrichment and of its spatial distribution on predator-prey dynamics in metacommunities. We found that the potential for destabilization was depending on the connectivity among communities and the spatial distribution of enrichment. In one hand, we found that at low dispersal regional enrichment led to the destabilization of predator-prey dynamics. This destabilizing effect was more pronounced when the enrichment was uneven among communities. In the other hand, we found that high dispersal could stabilize the predator-prey dynamics when the enrichment was spatially heterogeneous. Our results illustrate that the destabilizing effect of enrichment can be dampened when the spatial scale of resource enrichment is lower than that of organismss movements (heterogeneous enrichment). From a conservation perspective, our results illustrate that spatial heterogeneity could decrease the regional extinction risk of species involved in specialized trophic interactions. From the perspective of biological control, our results show that the heterogeneous distribution of pest resource could favor or dampen outbreaks of pests and of their natural enemies, depending on the spatial scale of heterogeneity.
Fichier principal
Vignette du fichier
journal.pone.0082969.PDF (538.86 Ko) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

hal-01643622 , version 1 (21-11-2017)

Licence

Paternité

Identifiants

Citer

Céline Hauzy, Grégoire Nadin, Elsa Canard, Isabelle Gounand, Nicolas Mouquet, et al.. Confronting the Paradox of Enrichment to the Metacommunity Perspective. PLoS ONE, 2013, 8 (12), pp.e82969. ⟨10.1371/journal.pone.0082969⟩. ⟨hal-01643622⟩
490 Consultations
87 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More