Chapter

Distribution within the Hawaiian Islands

Michael Heads

in Molecular Panbiogeography of the Tropics

Published by University of California Press

Published in print January 2012 | ISBN: 9780520271968
Published online September 2012 | e-ISBN: 9780520951808 | DOI: http://dx.doi.org/10.1525/california/9780520271968.003.0008
Distribution within the Hawaiian Islands

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Distribution patterns in the Hawaiian Islands have often been interpreted with respect to island age and the “progression rule,” with groups on younger islands predicted to be nested in groups on older islands. Nevertheless, most molecular studies do not support a simple progression rule. Instead, groups on different individual islands show reciprocal monophyly. Also, groups on older islands may be nested in groups on younger islands, and basal groups occur on all the main islands. These nonprogression rule patterns are often regarded as anomalies, but are repeated in many groups with different ecology, and can be explained by the complex geological history of the region. The Hawaiian biota and many of its features are often regarded as “extraordinary.” This is not necessary if the biota is derived from an ancestral Mesozoic biota in the north-central Pacific, rather than a product of Asia or America.

Keywords: Hawaiian Islands; progression rule; non-progression rule; island age; reciprocal monophyly; Hawaiian biota; relic

Chapter.  18140 words.  Illustrated.

Subjects: Evolutionary Biology

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