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(詳細はbiodiversity empirically. Each measure of biodiversity relates to a particular use of the data. For practical conservationists, measurements should include . For others, a more economically defensible definition should allow the ensuring of continued possibilities for both adaptation and future use by humans, assuring environmental sustainability. As a consequence, biologists argue that this measure is likely to be associated with the variety of genes. Since it cannot always be said which genes are more likely to prove beneficial, the best choice for conservation is to assure the persistence of as many genes as possible. For ecologists, this latter approach is sometimes considered too restrictive, as it prohibits ecological succession. == Taxonomic Diversity == Biodiversity is usually plotted as taxonomic richness of a geographic area, with some reference to a temporal scale. Whittaker〔Whittaker, R.H., ''Evolution and measurement of species diversity'', Taxon, 21, 213–251 (1972)〕 described three common metrics used to measure species-level biodiversity, encompassing attention to species richness or species evenness: * Species richness - the least sophisticated of the indices available. * Simpson index * Shannon-Wiener index Recently, another new index has been invented called the Mean Species Abundance Index (MSA); this index calculates the trend in population size of a cross section of the species. It does this in line with the CBD 2010 indicator for species abundance.〔(MSA Index (page 4) )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Measurement of biodiversity」の詳細全文を読む スポンサード リンク
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