Biodiversity is the term used to describe the variety of living organisms and the variety of ecosystems in a particular area.Species richness is the number of different species in a particular area at a given time.Species diversity refers to the number of different species and the number of individuals of that species within a community.Genetic diversity refers to the number of different alleles of genes within a population.Ecosystem diversity refers to the number of different habitats.The species diversity gives an indication of the total number of species and the total number of individuals of each species in a particular habitat. The index of diversity is calculated as follows: