Bio diversity

Biological diversity' means the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are a part; this includes diversity within species, between species and of ecosystems.

• Biodiversity is the variety of organisms in an area. It can be considered on different levels including habitat, species and genetic diversity of an area
• Habitat diversity refers to the range of habitats present in a region
• Species diversity is the number of species and the number of individuals within each species in a specified area. It takes into account species richness and species evenness.
• Species richness is a measure of the number of different species in a community.
• Species evenness is a measure of the relative abundances of different species in an area.

• Genetic diversity is the variety of all the genes (number of different alleles of genes) possessed by the individuals in a population or whole species
• Alleles are different forms of the same gene

• The greater the genetic diversity, the greater the ability of the species to adapt to a changing environment.
• Genetic diversity can be estimated by comparing physical characteristics or by analyzing genomes.