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Molecular Panbiogeography of the Tropics$
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Michael Heads

Print publication date: 2012

Print ISBN-13: 9780520271968

Published to California Scholarship Online: September 2012

DOI: 10.1525/california/9780520271968.001.0001

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Biogeography of the Central Pacific: Endemism, Vicariance, and Plate Tectonics

Biogeography of the Central Pacific: Endemism, Vicariance, and Plate Tectonics

Chapter:
(p.267) 6 Biogeography of the Central Pacific: Endemism, Vicariance, and Plate Tectonics
Source:
Molecular Panbiogeography of the Tropics
Author(s):

Michael Heads

Publisher:
University of California Press
DOI:10.1525/california/9780520271968.003.0006

New volcanic islands may be colonized from neighboring islands rather than from distant continents. The source islands may subsequently erode and subside, and eventually form atolls or submerged seamounts. Island taxa persist more or less in situ as dynamic metapopulations on individually ephemeral islands. These metapopulations may evolve by vicariance during rifting and basin formation, as in continental groups. In the Pacific, phases of Cretaceous volcanism associated with the South Pacific superswell have produced large igneous plateaus. Some of these include fossil wood in sedimentary strata intercalated with the volcanics. This chapter examines clades that are widely distributed in the central Pacific and endemic there, and relates these to the complex geological history.

Keywords:   atoll, seamount, metapopulation, vicariance, Pacific, endemism, South Pacific superswell, large igneous plateau

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