Jul 29, 1994

Estimating terrestrial biodiversity through extrapolation

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Robert K Colwell, Jonathan A Coddington

Abstract

Both the magnitude and the urgency of the task of assessing global biodiversity require that we make the most of what we know through the use of estimation and extrapolation. Likewise, future biodiversity inventories need to be designed around the use of effective sampling and estimation procedures, especially for 'hyperdiverse' groups of terrestrial organisms, such as arthropods, nematodes, fungi, and microorganisms. The challenge of estimating patterns of species richness from samples can be separated into (i) the problem of estimating local species richness, and (ii) the problem of estimating the distinctness, or complementarity, of species assemblages. These concepts apply on a wide range of spatial, temporal, and functional scales. Local richness can be estimated by extrapolating species accumulation curves, fitting parametric distributions of relative abundance, or using non-parametric techniques based on the distribution of individuals among species or of species among samples. We present several of these methods and examine their effectiveness for an example data set. We present a simple measure of complementarity, with some biogeographic examples, and outline the difficult problem of estimating complementarity from sam...Continue Reading

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Mentioned in this Paper

Microorganism
Fungi
Nematodes
Personality Inventories
Desertification
Nematodes
Arthropods
Phylum Nematoda

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