Question

Difference between shannon diversity index and simpson diversity index

Answer 1

The trouble with the Shannon-Wiener index is that it's very sample-size dependent, though less so than species richness. ... The Shannon-wiener index value increases with biodiversity. In contrast, the Simpson index measures the relative abundance of species, with a higher value indicating high dominance/low biodiversity.

Answer 2

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In fact Simpson index is considered more as a dominance index as it accounts proportion of species in a sample. Whereas, Shannon-Weiner index is based on randomness present at a site and considers both species richness and equitability in distribution in a sample.