Chapter

Life-History Evolution in Native and Introduced Populations

Robert F. Denno, Merrill A. Peterson, Matthew R. Weaver and David J. Hawthorne

in Specialization, Speciation, and Radiation

Published by University of California Press

Published in print March 2008 | ISBN: 9780520251328
Published online March 2012 | e-ISBN: 9780520933828 | DOI: http://dx.doi.org/10.1525/california/9780520251328.003.0021
Life-History Evolution in Native and Introduced Populations

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Many of the best examples of rapid directional selection of life-history traits involve invasive species. The evolution of such traits in introduced populations may be rapid in part because some traits, such as dispersal and high reproductive potential, may promote the colonization of novel habitats, whereas a different suite of traits may be favored in the newly colonized region. This chapter explores the evolution of life-history traits in native and introduced populations, focusing on Prokelisia planthoppers and their only host plants, Spartina cordgrasses. Prokelisia planthoppers are small phloem-feeding herbivorous insects while Spartina cordgrasses grow as expansive monocultures in intertidal salt marshes. The chapter looks at the life-history strategy and dispersal ecology of Prokelisia planthoppers, the geographic distribution of the insect and host, the geographic source of introduced species, genetic variation in introduced and native species, reproductive traits, voltinism, the genetics of geographic variation in the incidence of dispersal, and habitat factors underlying geographic variation in dispersal.

Keywords: Prokelisia; planthoppers; Spartina; cordgrasses; evolution; life-history traits; native species; introduced species; genetic variation; geographic variation

Chapter.  11783 words.  Illustrated.

Subjects: Evolutionary Biology

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