Skip to Main content Skip to Navigation
Journal articles

Density-dependent dispersal and relative dispersal affect the stability of predator-prey metacommunities

Abstract : Although density-dependent dispersal and relative dispersal (the difference in dispersal rates between species) have been documented in natural systems, their effects on the stability of metacommunities are poorly understood. Here we investigate the effects of intra- and interspecific density-dependent dispersal on the regional stability in a predator-prey metacommunity model. We show that, when the dynamics of the populations reach equilibrium, the stability of the metacommunity is not affected by density-dependent dispersal. However, the regional stability, measured as the regional variability or the persistence, can be modified by density-dependent dispersal when local populations fluctuate over time. Moreover these effects depend on the relative dispersal of the predator and the prey. Regional stability is modified through changes in spatial synchrony. Interspecific density-dependent dispersal always desynchronises local dynamics, whereas intraspecific density-dependent dispersal may either synchronise or desynchronise it depending on dispersal rates. Moreover, intra- and interspecific density-dependent dispersal strengthen the top-down control of the prey by the predator at intermediate dispersal rates. As a consequence the regional stability of the metacommunity is increased at intermediate dispersal rates. Our results show that density-dependent dispersal and relative dispersal of species are keys to understanding the response of ecosystems to fragmentation.
Document type :
Journal articles
Complete list of metadatas

Cited literature [35 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00616256
Contributor : Hal Peer <>
Submitted on : Sunday, August 21, 2011 - 2:52:03 AM
Last modification on : Wednesday, October 14, 2020 - 3:48:13 AM

File

PEER_stage2_10.1016%2Fj.jtbi.2...
Files produced by the author(s)

Identifiers

Collections

Citation

C. Céline Hauzy, Mathias Gauduchon, Florence D. Hulot, Michel Loreau. Density-dependent dispersal and relative dispersal affect the stability of predator-prey metacommunities. Journal of Theoretical Biology, Elsevier, 2010, 266 (3), pp.458. ⟨10.1016/j.jtbi.2010.07.008⟩. ⟨hal-00616256⟩

Share

Metrics

Record views

146

Files downloads

362