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Species Diversity

  • Biodiversity is the general term used to describe variety in the living world.
  • It refers to the number and variety of living organisms in a particular area and has three components:
  • Species diversity refers to the number of different species and number of individuals of each species within any one community.
  • Genetic diversity refers to the variety of genes possessed by the individuals that make up any one species.
  • Ecosystem diversity refers to the range of different habitats within a particular area.
  • One measure of biodiversity is species diversity. It has two components:
  • the number of different species in a given area.
  • the proportion of the community that is made up of an individual species.

Species Diversity and Human Activites

  • Mankind has had a considerable impact on the natural world and has led to a reduction in biodiversity.
  • Agriculture and deforestation are the two main activites which have reduced species diversity.

Impact of agriculture

  • Natural ecosystems have complex communities with many individuals of a large number of different species, and so have high species index.
  • Agricultural ecosystems are controlled by humans and are different to natural ecosystems.
  • Species


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