Morisita’s prosperity index revisited
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In order to develop a composite measure of community species diversity and abundance, a generalization of Morisita’s prosperity index is proposed. Using Hill’s diversity representation, the prosperity index is a product of the total number of individuals and the effective number of species in a community. A series of prosperity indices can be derived using a parameter (Hill’s number). As an analogy of component partitions of species diversity, regional, within, and between components are also defined. The prosperity index will be useful for practical aspects related to conservation and management.
KeywordsDiversity Community Abundance Effective number of species Partition
The author is grateful to M Uchida and N Tezuka for their valuable discussions. Comments of S Abe improved the manuscript. This work was partly supported by a biodiversity Project of the Fisheries Agency Japan.
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