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The Habitat-Unit Model of Island Biogeography

R. Buckley
Journal of Biogeography
Vol. 9, No. 4 (Jul., 1982), pp. 339-344
Published by: Wiley
DOI: 10.2307/2844720
Stable URL: http://www.jstor.org/stable/2844720
Page Count: 6
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The Habitat-Unit Model of Island Biogeography
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Abstract

A review of the aims and present status of island biogeography indicates that within-island habitat heterogeneity remains a major stumbling-block in current models, which incorporate its effects by including various indices of habitat diversity in multiple regressions. Where the islands are divisible into definable habitat units, an alternative approach is to relate species richness to area and isolation independently for each unit and then sum over all units. In a test archipelago off Western Australia, this 'habitat-unit' model provides significantly better predictions of actual species richness than does the 'classical' model.

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