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From Wikipedia, the free encyclopedia

Species diversity is an index that incorporates the number of species in an area and also their relative abundance. It is a more comprehensive value than species richness.[1]

The most common index of species diversity is a family of equations called Simpson's Diversity Index.[2]

Here is one such example[1]

D = (n / N)2

Where n is the total number of organisms of a particular species and N is the total number of organisms of all species. D is the value of diversity. It can range between 0 and 1, where 0 is infinite diversity, and 1 is the least diverse an ecosystem can possibly be (i.e. only one species present).

Humans have a huge effect on species diversity; the main reasons are:

See also

Notes

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