Document Detail

Climate change in metacommunities: dispersal gives double-sided effects on persistence.
MedLine Citation:
PMID:  23007082     Owner:  NLM     Status:  MEDLINE    
Climate change is increasingly affecting the structure and dynamics of ecological communities both at local and at regional scales, and this can be expected to have important consequences for their robustness and long-term persistence. The aim of the present work is to analyse how the spatial structure of the landscape and dispersal patterns of species (dispersal rate and average dispersal distance) affects metacommunity response to two disturbances: (i) increased mortality during dispersal and (ii) local species extinction. We analyse the disturbances both in isolation and in combination. Using a spatially and dynamically explicit metacommunity model, we find that the effect of dispersal on metacommunity persistence is two-sided: on the one hand, high dispersal significantly reduces the risk of bottom-up extinction cascades following the local removal of a species; on the other hand, when dispersal imposes a risk to the dispersing individuals, high dispersal increases extinction risks, especially when dispersal is global. Large-bodied species with long generation times at the highest trophic level are particularly vulnerable to extinction when dispersal involves a risk. This suggests that decreasing the mortality risk of dispersing individuals by improving the quality of the habitat matrix may greatly increase the robustness of metacommunities.
Anna Eklöf; Linda Kaneryd; Peter Münger
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  367     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-09-25     Completed Date:  2013-04-03     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2945-54     Citation Subset:  IM    
IFM, Theory and Modeling, Division of Theoretical Biology, Linköping University, 581 83 Linköping, Sweden.
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MeSH Terms
Animal Migration*
Body Size
Climate Change*
Computer Simulation
Extinction, Biological
Feeding Behavior / physiology*
Models, Biological
Population Dynamics
Predatory Behavior / physiology
Risk Factors

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