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Allee Effects in Ecology and Conservation - Oxford Scholarship Online
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Allee Effects in Ecology and Conservation

Franck Courchamp, Ludek Berec, and Joanna Gascoigne


Allee effects are broadly defined as a decline in individual fitness at low population size or density, that can result in critical population thresholds below which populations crash to extinction. As such, they are very relevant to many conservation programmes, where scientists and managers are often working with populations that have been reduced to low densities or small numbers. There are a variety of mechanisms that can create Allee effects, including mating systems, predation, environmental modification, and social interactions among others. The abrupt and unpredicted collapses of many ... More

Keywords: conservation biology, population, density dependence, population size, population threshold, population density, individual fitness

Bibliographic Information

Print publication date: 2008 Print ISBN-13: 9780198570301
Published to Oxford Scholarship Online: May 2008 DOI:10.1093/acprof:oso/9780198570301.001.0001


Affiliations are at time of print publication.

Franck Courchamp, author
Department of Ecologie, Systématique & Evolution, Univ Paris Sud, France

Ludek Berec, author
Biology Centre of the Academy of Sciences of the Czech Republic, Ceské Budejovice, Czech Republic

Joanna Gascoigne, author
School of Ocean Sciences, University of Wales at Bangor, UK