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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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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 17 April 2021

What are Allee effects?

What are Allee effects?

(p.1) 1. What are Allee effects?
Allee Effects in Ecology and Conservation

Franck Courchamp

Luděk Berec

Joanna Gascoigne

Oxford University Press

This first chapter acts as an introduction to the book. It explains what an Allee effect is, provides a clear definition of the main concept and of its nuances, and briefly explains how it works both at the individual and population levels. The first part of the chapter describes the progression of the ideas in ecology that led a mostly ‘competition’ oriented view of both behavioural ecology and population dynamics to standpoint where cooperation plays a more appropriate role. This helps to illustrate the concepts that have historically emerged with the works of Professor Warder Clyde Allee, and how studies about Allee effects have evolved both in numbers and orientations over the decades. By explaining the notions related to Allee effects — mostly the two major distinctions (weak/strong and demographic/component Allee effects) and the boundaries of the concept — the book's structure and framework is described.

Keywords:   Warder Clyde Allee, weak Allee effect, strong Allee effect, demographic Allee effect, component Allee effect, history of ecology, cooperation, competition, definition, concept emergence

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