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Specialization, Speciation, and RadiationThe Evolutionary Biology of Herbivorous Insects$
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Kelley Tilmon

Print publication date: 2008

Print ISBN-13: 9780520251328

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520251328.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 17 September 2021

Comparative Analyses of Ecological Speciation

Comparative Analyses of Ecological Speciation

(p.117) Nine Comparative Analyses of Ecological Speciation
Specialization, Speciation, and Radiation

Daniel J. Funk

Patrik Nosil

University of California Press

Although the contribution of natural selection to speciation was not an explicit empirical focus of most of the twentieth century, it was often assumed to be an important factor in the evolutionary diversification of lineages. A challenging task is identifying the potential contributions of ecological divergence to reproductive barriers that are not inherently ecological, including sexual isolation, cryptic postmating isolation, and intrinsic hybrid inviability. This chapter shows how particular comparative approaches can be used to identify and quantify ecological contributions to reproductive isolation and speciation, focusing on herbivorous insects. First, it discusses the nature and study of ecological speciation, and presents some advantages of evaluating herbivorous insect systems for such investigations. The chapter then describes recently developed comparative approaches that have provided insights on this topic. It also analyzes available herbivore data sets to illustrate these methods and the evidence they provide on ecology's role in herbivore speciation, highlights important issues pertaining to the conduct and interpretation of these comparative studies, and suggests future directions for advancing the multidimensional study of ecological speciation through the creative application of comparative approaches.

Keywords:   ecological speciation, herbivorous insects, comparative studies, reproductive isolation, ecology, natural selection, diversification, reproductive barriers

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