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Spatial Models for Species-Area Curves

✍ Scribed by Rick Durrett; Simon Levin

Book ID
102611353
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
458 KB
Volume
179
Category
Article
ISSN
0022-5193

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✦ Synopsis

Inspired by earlier work of Hubbell, we introduce a simple spatial model to explain observed species-area curves. As in the theory of MacArthur and Wilson, our curves result from a balance between migration and extinction. Our model predicts that the wide range of slopes of species-area curves is due to the differences in the rates at which new species enter this system. However, two other predictions, that the slope increases with increasing migration/mutation and that the curves for remote islands are flatter than those for near islands, are at odds with some interpretations of data. This suggests either that the data have been misinterpreted, or that the model is not sufficient to explain them.

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