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Plants on IslandsDiversity and Dynamics on a Continental Archipelago$
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Martin Cody

Print publication date: 2006

Print ISBN-13: 9780520247291

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520247291.001.0001

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Island Biogeography

Island Biogeography

Concepts, Theory, and Data

Chapter:
(p.36) 3 Island Biogeography
Source:
Plants on Islands
Author(s):

Martin L. Cody

Publisher:
University of California Press
DOI:10.1525/california/9780520247291.003.0003

This chapter present a brief overview of the theory, concepts, and analytical tools of island biogeography, focusing on the aspects of colonization and extinction dynamics appropriate to continental islands in a setting such as Barkley Sound. It first discusses the main elements of the MacArthur-Wilson (M/W) equilibrium theory of island biogeography. The M/W theory considers that colonization rates are primarily a function of island isolation and decrease with distance, whereas extinction rates are primarily functions of island size and decrease with increasing island area. The chapter also relates observed colonization and extinction rates on Barkley Sound islands to island size and isolation, and shows that colonization and extinction rates differ among taxa; and that rates also differ among islands, with island size and isolation affecting the former.

Keywords:   island biogeography, Barkley Sound, MacArthur-Wilson equilibrium, colonization, extinction, island size, isolation

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