The most obvious definition of biodiversity is the variety of species on Earth. Biodiversity or biological diversity refers to the variety of life forms: the different form. This plants, animals and microorganisms, the genes they contain, and the ecosystems they living wealth is the product of hundreds of millions of years of evolutionary history. Biological diversity is usually considered at three different levels: genetic diversity, species diversity and ecosystem diversity. Genetic diversity refers to the …showed first 75 words of 1123 total…

…showed last 75 words of 1123 total…in the ith species. In the Simpson's index (D), Simpson (1949) gave the probability of any two individuals drawn at random from an infinitely large community belonging to different species. The formula used is: D = N(N - I)/∑n(n - I) where D is Simpson's diversity index, N represents the total number of individuals in the sample, n is the number of individuals of each species in the sample and ∑ is summation.