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A functional evenness index for microbial ecology

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Abstract

Microbial ecologists attempting to describe community structures through the use of synthetic parameters face enormous difficulties. These stem in part from the necessity of using standard taxonomic reference levels in a field where the species level is poorly defined. This paper presents an attempt to obviate this problem. A “functional evenness” index (E) is defined using information measures; it is based directly on the characteristics of the bacteria, as determined, for example, with the API 20B method. Comparisons of this index with classic structure indices, such as taxonomic evenness (Pielou) or systematic dominance (Hulburt), show that it behaves like an evenness index, while bypassing the taxonomic study required before computation of the classic indices. Its use is illustrated with samples of aerobic heterotrophic bacteria obtained from brackish lagoon sediments.

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Authors and Affiliations

  1. Laboratory of Marine Biology, Université des Sciences et Techniques du Languedoc, F-34060, Montpellier Cedex, France

    Marc Troussellier & Pierre Legendre

  2. Department of Biological Sciences, Université de Montréal, H3C 3J7, Montreal, Quebec, Canada

    Marc Troussellier & Pierre Legendre

Authors
  1. Marc Troussellier
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  2. Pierre Legendre
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Additional information

We are grateful to our statistician colleagues, Dr. Yves Lepage from Université de Montréal and Dr. André Plante from Université du Québec à Montréal. Both have contributed important elements to the discussion presented in this Appendix.

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Troussellier, M., Legendre, P. A functional evenness index for microbial ecology. Microb Ecol 7, 283–296 (1981). https://doi.org/10.1007/BF02341423

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