An experimental evaluation of diversity indices as environmental discriminators |
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Authors: | J V Robinson C D Sandgren |
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Institution: | (1) Department of Biology, The University of Texas at Arlington, 76019 Arlington, TX, U.S.A. |
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Abstract: | Seven diversity indices were calculated for each of fifty-eight microcosm communities. All fifty-eight communities were initiated from equal density inoculations of fourteen algal species. Each microcosm developed in one of six controlled experimental environments; the environments differing only in their temporal patterns of disturbance. Five linear discriminating techniques were used to evaluate the diversity index most useful for discriminating between these environments. The Shannon-Wiener index was best according to two of the discriminating methodologies and second best using the other techniques. Evenness was best when the Shannon-Wiener index was second best and vice versa. |
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Keywords: | diversity indices microcosms phytoplankton communities |
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