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SPECIES ASSEMBLAGES AND INDICATOR SPECIES:THE NEED FOR A FLEXIBLE ASYMMETRICAL APPROACH

SPECIES ASSEMBLAGES AND INDICATOR SPECIES:THE NEED FOR A FLEXIBLE ASYMMETRICAL APPROACH This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative abundance with its relative frequency of occurrence in the various groups of sites. This index is maximum when all individuals of a species are found in a single group of sites and when the species occurs in all sites of that group; it is a symmetric indicator. The statistical significance of the species indicator values is evaluated using a randomization procedure. Contrary to Twinspan, our indicator index for a given species is independent of the other species relative abundances, and there is no need to use pseudospecies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecological Monographs Wiley

SPECIES ASSEMBLAGES AND INDICATOR SPECIES:THE NEED FOR A FLEXIBLE ASYMMETRICAL APPROACH

Ecological Monographs , Volume 67 (3) – Jan 1, 1997

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References (64)

Publisher
Wiley
Copyright
© Ecological Society of America
ISSN
0012-9615
eISSN
1557-7015
DOI
10.1890/0012-9615(1997)067[0345:SAAIST]2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative abundance with its relative frequency of occurrence in the various groups of sites. This index is maximum when all individuals of a species are found in a single group of sites and when the species occurs in all sites of that group; it is a symmetric indicator. The statistical significance of the species indicator values is evaluated using a randomization procedure. Contrary to Twinspan, our indicator index for a given species is independent of the other species relative abundances, and there is no need to use pseudospecies.

Journal

Ecological MonographsWiley

Published: Jan 1, 1997

Keywords: ; ; ; ; ; ; ; ; ;

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