Biodiversity is a contraction of term biological diversity which refers to the variety within the living world.Diversity in forestry parlance is an amalgamation of species richness and evenness.The word richness indicates the number of species present in a designated area, where as evenness stands for the relative abundance of each species.it means that a pristine forest and a seriously degraded site may have identical number of species but the evenness will decide the degree of diversit