When excited by absorption of a photon of light, GFP emits a photon (that is, it fluoresces) in the green region of the spectrum. 

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#Unit 10. Ecological Principles

Gini Simpson index of diversity (DGS) = 1 − DS.

DGS and species diversity are positive related

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#Unit 10. Ecological Principles

The Shannon index Direct related with Diversity and increases with addition of species and even distribution of species.

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#Unit 10. Ecological Principles

The Brillouin index

Brillouin index discriminates between these two communities with same richness and evenness  and the Shannon index does not.

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#Unit 10. Ecological Principles

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#Unit 10. Ecological Principles

Evenness is a measure of how diverse a community is relative to the maximum possible diversity

E=Hs/Hmax