NEET BIOLOGY

Detailed explanation-1: -The most popular of such indices have been the inverse Simpson index (1/) and the Gini–Simpson index (1 − ). Both of these have also been called the Simpson index in the ecological literature, so care is needed to avoid accidentally comparing the different indices as if they were the same.

Detailed explanation-2: -Simpson’s Diversity Index is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. As species richness and evenness increase, so diversity increases.

Detailed explanation-3: -Shannon-Weiner Index Another widely used index of diversity that also considers both species richness and evenness is the Shannon-Weiner Diversity Index, originally proposed by Claude Shannon in 1948. It is also known as Shannon’s diversity index.

Detailed explanation-4: -Simpson’s similarity index is used to calculate the similarity between a pair of community samples, to quantify whether their species composition is similar (they share most or all the species) or different.

Detailed explanation-5: -Using the values we found earlier, Simpson’s Index can be calculated as: D = 2, 668 / (105*(105-1)) = 0.244. We can also calculate Simpson’s Index of Diversity as 1 – D = 1 – 0.244 = 0.756. We can also calculate Simpson’s Reciprocal Index as 1 / D = 1 / .