Chapter

The Evolution of an Adaptive Radiation

Jonathan B. Losos

in Lizards in an Evolutionary Tree

Published by University of California Press

Published in print August 2009 | ISBN: 9780520255913
Published online March 2012 | e-ISBN: 9780520943735 | DOI: http://dx.doi.org/10.1525/california/9780520255913.003.0015
The Evolution of an Adaptive Radiation

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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

Chapter.  14754 words.  Illustrated.

Subjects: Evolutionary Biology

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