BIODIVERSITY - variety in the living world.
It refers to the number and variety of living organisms in a particular area. It has 3 components:
1. SPECIES DIVERSITY - refers to the number of different species and the number of individuals of each species within any one community. It has 2 componnents:
a) The number of different species in a given area.
b) The proportion of a community thats made up of an individual species.
Two communities may have the same number of species, but the proportions of the community made up of each species may differ markedly.
2. GENETIC DIVERSITY - variety of genes possessed by the individuals that make up any one species.
3. ECOSYSTEM DIVERSITY - range of different habitats within a particular area.
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