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

Journal of Theoretical Biology
Céline HauzyMichel Loreau

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 desynchronizses local dynamics, whereas intraspecific density-dependent dispersal may either synchronize or desynchronize 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 t...Continue Reading

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Citations

Dec 21, 2013·PloS One·Céline HauzyBo Ebenman
Jan 6, 2012·The American Naturalist·Pradeep PillaiMichel Loreau
Dec 2, 2014·The American Naturalist·Isabelle GounandDominique Gravel
Feb 9, 2012·Ecology Letters·Sonia KéfiUlrich Brose
May 30, 2012·Ecology Letters·Jennifer K CooperDavid J S Montagnes
Jun 14, 2017·Mathematical Biosciences and Engineering : MBE·Yun KangKomi Messan
Oct 30, 2018·Ecology Letters·Laura Melissa GuzmanPatrick L Thompson
Nov 6, 2018·Journal of Theoretical Biology·Elizabeth F FussellRobert A Van Gorder

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