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Science 4 September 1998:
Vol. 281. no. 5382, pp. 1513 - 1515
DOI: 10.1126/science.281.5382.1513
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Reports

Extrapolating Species Abundance Across Spatial Scales

William E. Kunin

The analysis, measurement, and management of species abundance is central to ecology and conservation biology, but it has proved difficult to find a single index that adequately reflects the commonness or rarity of species across a range of spatial scales. Here, a scale-independent measure of species abundance is developed, using presence-absence maps at varying spatial resolutions. By extrapolating such "scale-area" curves, species abundance can be estimated accurately even at scales finer than those used to parameterize the model, a task that had previously been deemed impossible in principle.

Centre for Biodiversity and Conservation, School of Biology, University of Leeds, Leeds, LS2 9JT, UK. E-mail: w.e.kunin{at}leeds.ac.uk

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