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Evolution's WedgeCompetition and the Origins of Diversity$
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David W. Pfennig and Karin S. Pfennig

Print publication date: 2012

Print ISBN-13: 9780520274181

Published to California Scholarship Online: May 2013

DOI: 10.1525/california/9780520274181.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 21 October 2019

Diversity And Novelty Within Species

Diversity And Novelty Within Species

Chapter:
(p.105) 5 Diversity And Novelty Within Species
Source:
Evolution's Wedge
Author(s):

David W. Pfennig

Karin S. Pfennig

Publisher:
University of California Press
DOI:10.1525/california/9780520274181.003.0005

Intraspecific competition can have a profound influence on shaping diversity within species. Intraspecific competition can promote niche-width expansion, sexual dimorphism, and resource or mating polymorphism. Such polymorphisms are of interest in their own right, because they provide some of the most dramatic examples of diversity within species. Indeed, the process of diversification and innovation may often begin within species, through the evolution of such alternative phenotypes. Intraspecific divergence is also potentially important, however, because of its possible role in facilitating character displacement between species and possibly even speciation. In short, intraspecific competition for resources and mates can have far-reaching impacts on the origins of diversity, from promoting diversity and novelty within populations to promoting diversity between species.

Keywords:   alternative phenotypes, intraspecific character displacement, intraspecific competition, mating polymorphism, niche-width expansion, novelty, resource polymorphism

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