Species of reptiles occupying habitat islands in Western Arizona: a deterministic assemblage

Species of reptiles occupying habitat islands in Western Arizona: a deterministic assemblage Island size, habitat heterogeneity, and distance from major (“mainland”) stands of habitat were examined relative to composition and number of coexisting reptile species dependent on upland habitats of 11 mountain and 4 riparian habitat islands. Species richness increased with area on mountain islands, but area was unimportant in predicting species richness on riparian islands. Instead, isolation was of primary importance. Regardless of factors determining species richness, composition of species were deterministic; small assemblages were always totally included subsets of all larger assemblages. This pattern of determinism apparently reflects selective extinctions and the inability of species to recolonize due to the insurmountable barrier imposed by the Sonoran Desert. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Oecologia Springer Journals

Species of reptiles occupying habitat islands in Western Arizona: a deterministic assemblage

Oecologia, Volume 66 (4) – Jul 1, 1985

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Publisher
Springer Journals
Copyright
Copyright © 1985 by Springer-Verlag
Subject
Life Sciences; Ecology; Plant Sciences
ISSN
0029-8549
eISSN
1432-1939
DOI
10.1007/BF00379354
Publisher site
See Article on Publisher Site

Abstract

Island size, habitat heterogeneity, and distance from major (“mainland”) stands of habitat were examined relative to composition and number of coexisting reptile species dependent on upland habitats of 11 mountain and 4 riparian habitat islands. Species richness increased with area on mountain islands, but area was unimportant in predicting species richness on riparian islands. Instead, isolation was of primary importance. Regardless of factors determining species richness, composition of species were deterministic; small assemblages were always totally included subsets of all larger assemblages. This pattern of determinism apparently reflects selective extinctions and the inability of species to recolonize due to the insurmountable barrier imposed by the Sonoran Desert.

Journal

OecologiaSpringer Journals

Published: Jul 1, 1985

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