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Studying canopy arthropods in New Caledonia: how to obtain a representative sample

Published online by Cambridge University Press:  01 September 1998

Eric Guilbert
Eric Guilbert
Affiliation:
EP 90 du CNRS, Laboratoire d'Entomologie, Muséum National d'Histoire Naturelle, 45 rue Buffon, F-75005 Paris, France.
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Abstract

Canopy arthropods were sampled by insecticide fogging to study their community structure in two New Caledonian primary rain forests. The representativeness of these samples was analysed by two different methods: the diversity-area relationship and the relationship between the distribution of the taxa and the sample size, using Pielou's method. The results showed that the higher the degree of aggregation, the higher must be the minimum sample size to ensure a stable distribution. In the same way, the higher the diversity index, the higher must be the sample size to ensure a representative sample of the community. In this study, 40 sample units of 1 m2 were used, although, samples of 9 to 25 m2 seem to be sufficient according to the distribution of the taxa sampled. Five to 30 m2 should be sufficient to ensure representative samples of the whole community for estimating diversity.

Keywords

biodiversitycanopy arthropodsdistribution indexdiversity indexfoggingNew Caledoniarepresentative samplesample size
Type
Research Article
Information
Journal of Tropical Ecology , Volume 14 , Issue 5 , September 1998 , pp. 665 - 672
Copyright
© 1998 Cambridge University Press

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