Volume 65, Issue 2 p. 105-129

PATTERNS IN THE GEOGRAPHICAL RANGES OF SPECIES

KEVIN J. GASTON

KEVIN J. GASTON

Department of Biology, University of York, York YO1 5DD, U.K., now at Department of Entomology, British Museum(Natural History), Cromwell Road, London SW7 5BD, U.K

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First published: May 1990
Citations: 159

Summary

1. A growing number of studies have documented patterns in species geographic ranges relevant to the study of community structure. These include patterns in the frequency of geographic ranges of different sizes, and in the interaction of range sizes with population abundances and variabilities, body sizes, trophic characteristics and extinction probabilities.

2. Agreement between hypothesized and observed relationships is reasonably good, but we do not know how general the patterns are. Analysis of patterns has focused upon a few taxonomic groups, a bias largely resulting from a lack of information on the geographic distributions of most taxa.

3. Many of the patterns are interrelated, and although theoretical bases to all the patterns can be suggested, it is possible that some are artifacts.

4. Taylor power plots give us a means of making predictions about population behaviour as it pertains to geographic ranges. Some of these predictions suggest that previous conceptions of such interactions have been too narrow, but empirical analyses of these patterns will be hampered by the difficulty of measuring population variability.

5. In general, our knowledge of the structure, and spatial and temporal behaviour, of species geographic ranges remains poor.

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