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A comparison of amphibian communities through time and from place to place in Bornean forests

Published online by Cambridge University Press:  10 July 2009

Robert F. Inger
Affiliation:
Field Museum of Natural History, Chicago, Illinois, USA
Harold K. Voris
Affiliation:
Field Museum of Natural History, Chicago, Illinois, USA

Abstract

We sampled riparian frogs along 18 streams at eight localities in Borneo. At four of these sites we sampled during more than one year. Altogether 49 species were included in our study and total sample size was 13,249. We measured overlap in species occurrences and arrays of abundances within and among localities. Variation over the time span of our study was minor within communities. Overlaps between streams at a locality were generally higher than overlaps of pairs of streams from different localities. Environmental variation, particularly in stream width and gradient, had a clear effect on both intra-and inter-locality overlaps. Although rainfall varied between localities and within localities over time, that variation did not seem to affect overlaps among or within communities. Environmental factors did not account for all differences in overlaps between communities. Instead, regional processes, perhaps the timing of barriers or speciation events, appear to have been responsible for geographic restrictions of several species, leading to variation in overlap values.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1993

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