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Lizards in an Evolutionary TreeEcology and Adaptive Radiation of Anoles$
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Jonathan Losos

Print publication date: 2009

Print ISBN-13: 9780520255913

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520255913.001.0001

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The Evolution of an Adaptive Radiation

The Evolution of an Adaptive Radiation

(p.317) 15 The Evolution of an Adaptive Radiation
Lizards in an Evolutionary Tree

Jonathan B. Losos

University of California Press

This chapter examines the progression of adaptive radiation of anoles in the Greater Antilles. It describes the factors that have instigated anole diversification and analyzes whether rates and patterns of evolution have changed through time. The chapter also considers two traits that promote adaptive radiation and species diversification in anoles: the toepad and the dewlap. Species richness may also be affected by extrinsic factors: island area and microhabitat use. The importance of sexual dimorphism in adaptive radiation is also discussed. The chapter concludes with a comparative test to investigate whether most clades constitute adaptive radiations.

Keywords:   adaptive radiation, Greater Antilles, anole diversification, evolution, species diversification, toepad, dewlap, island area, microhabitat use

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