Inverse density dependence and the Allee effect

Franck Courchamp, Tim Clutton-Brock, Bryan Grenfell

Research output: Contribution to journalComment/debatepeer-review

1351 Scopus citations


The Allee effect describes a scenario in which populations at low numbers are affected by a positive relationship between population growth rate and density, which increases their likelihood of extinction. The importance of this dynamic process in ecology has been under-appreciated and recent evidence now suggests that it might have an impact on the population dynamics of many plant and animal species. Studies of the causal mechanisms generating Allee effects in small populations could provide a key to understanding their dynamics.

Original languageEnglish (US)
Pages (from-to)405-410
Number of pages6
JournalTrends in Ecology and Evolution
Issue number10
StatePublished - Oct 1 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics


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