The 6-membered cyclic form of sugars is usually called the “pyranose” form in reference to the cyclic ether pyran.

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#Unit 10. Ecological Principles

More diverse communities have a lower value of DBP than less-diverse communities.

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#Unit 10. Ecological Principles

Berger-Parker complement index is that it is very easy to compute.  Values of DBPC vary from 0 to 1.

DBPC=1 - DBP

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#Unit 10. Ecological Principles

Simpson’s diversity index DS and species diversity are negatively related.

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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.