What are Allee effects?
What are Allee effects?
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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