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Allee Effects in Ecology and Conservation$
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Franck Courchamp, Ludek Berec, and Joanna Gascoigne

Print publication date: 2008

Print ISBN-13: 9780198570301

Published to Oxford Scholarship Online: May 2008

DOI: 10.1093/acprof:oso/9780198570301.001.0001

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Genetics and evolution

Genetics and evolution

Chapter:
(p.131) 4. Genetics and evolution
Source:
Allee Effects in Ecology and Conservation
Author(s):

Franck Courchamp

Luděk Berec

Joanna Gascoigne

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198570301.003.0004

This chapter focuses on Allee effects in relation to genetics and evolution. These topics intersect in four different ways. First, genetics creates its own set of Allee effect mechanisms (e.g., via inbreeding depression). Second, there may be genetic differences among members of a population in their susceptibility to ecological Allee effects. Third, Allee effects are considered in the light of evolution — have populations evolved mechanisms to avoid Allee effects, and if so, how is it possible to find anything other than the ‘ghosts of Allee effects past’ in modern populations? Finally, Allee effects themselves may act as a selection pressure, and members of populations subject to Allee effects may thus evolve different characteristics as compared with those bounded only by negative density dependence. The chapter considers all these four issues in turn.

Keywords:   genetics, evolution, genetic Allee effect, inbreeding depression, genetically structured population, selection pressure, evolutionary suicide

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