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Weighted Gini-simpson Quadratic Index of Biodiversity for Interdependent species

Natural science 2014年第7期6卷 455-466页

作者： Radu Cornel Guiasu silviu Guiasu Department of Mathematics and statistics York University Toronto Canada Environmental and Health studies Program Department of Multidisciplinary Studies Glendon College York University Toronto Canada

The weighted Gini-simpson quadratic index is the simplest measure of biodiversity which takes into account the relative abundance of species and some weights assigned to the species. These weights could be assigned based on factors such as the phylogenetic distance between species, or their relative conservation values, or even the species richness or vulnerability of the habitats where these species live. In the vast majority of cases where the biodiversity is measured the species are supposed to be independent, which means that the relative proportion of a pair of species is the product of the relative proportions of the component species making up the respective pair. In the first section of the paper, the main versions of the weighted Gini-simpson index of biodiversity for the pairs and triads of independent species are presented. In the second section of the paper, the weighted Gini-simpson quadratic index is calculated for the general case when the species are interdependent. In this instance, the weights reflect the conservation values of the species and the distribution pattern variability of the subsets of species in the respective habitat induced by the inter-dependence between species. The third section contains a numerical example.

关键词： Weighted Gini-simpson Index Generalized Rao Index Interdependent species watanabe’s Entropic Measure of Interdependence Distribution Pattern Variability of the subsets of species

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