Document Detail

Allee effect, spatial structure and species coexistence.
MedLine Citation:
PMID:  12234750     Owner:  NLM     Status:  MEDLINE    
Both positive and negative interactions among species are common in communities. Until recently, attention has focused on negative interactions such as competition. However, the importance of positive interactions such as the Allee effect has recently been recognized. We construct a single-patch model that incorporates both an Allee effect and competition between two species. A species that experiences an Allee effect cannot establish in a patch which is already occupied by a competitor unless its density is over a critical value. This effect, when translated into a metapopulation, makes migrants of a species unable to colonize patches where another species has established. This interaction between the Allee effect and inter-specific competition creates and stabilizes spatial segregation of species. Therefore, under circumstances in which competition would preclude local coexistence, the presence of an Allee effect can allow coexistence at a metapopulation scale. Furthermore, we found that a species can resist displacement if stronger competitors experience an Allee effect.
Jean-Bautiste Ferdy; Jane Molofsky
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of theoretical biology     Volume:  217     ISSN:  0022-5193     ISO Abbreviation:  J. Theor. Biol.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-09-17     Completed Date:  2002-11-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376342     Medline TA:  J Theor Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  413-24     Citation Subset:  IM    
Laboratoire Génome, Populations et Interaction, Bât. 13, Université Montpellier II, CC-63, F-34095, Montpellier cedex 5, France.
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MeSH Terms
Behavior, Animal*
Competitive Behavior*
Models, Biological

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