diversity index

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diversity index

a single integrated measure that expresses the diversity of a particular community of organisms, e.g. freshwater invertebrates. The index can be related to the level of pollution in an ecosystem, and the greater the diversity, the less the pollution.
References in periodicals archive ?
Alpha diversity indices are commonly used in the studies of forest biodiversity assessment in China compared to other indices.
Species richness, Shannon index, Simpson index, Menhinik index and Margalev diversity indices were used to evaluate plant diversity in each sampling plot.
Diversity Indices and Statistical Analyses: The diversity indices of rotifers in the study area were calculated by using the Shannon-Weaver equation: H = -Pi(lnPi) (Shannon-Weaver, 1949) where Pi is the proportion of each species in the sample.
Table 2 presented the diversity indices of aphids among selected crops.
The most commonly used species diversity indices such as Shannon (H'), Simpson ([lambda]), Fisher's a, Hill's diversity indices (N1 and N2) and evenness (E) were calculated.
Dietary diversity indices were highest in three of the four Myotis species and lowest in E.
A comparison of the class average diversity indices between groups provides a good basis of discussion.
Two genetic diversity indices were calculated by the program Arlequin 2.0 (Schneider et al., 2000; http://anthro.unige.
Finally, the book reviews several species diversity indices and presents an original method for examining species richness and evenness within a study system and comparing these metrics across communities.
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