Biology · A-Level · AQA · AQA A-Level Biology - (7402) · Specification point · 3.4.6 · Genetic information, variation and relationships between organisms
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3.4.6 Biodiversity within a community
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Biodiversity can relate to a range of habitats, from a small local habitat to the Earth. Species richness is a measure of the number of different species in a community. An index of diversity describes the relationship between the number of species in a community and the number of individuals in each species. Calculation of an index of diversity (d) from the formula |
where N = total number of organisms of all species
and n = total number of organisms of each species.
Farming techniques reduce biodiversity. The balance between conservation and farming.
MS 2.3 Students could be given data from which to calculate an index of diversity and interpret the significance of the calculated value of the index. |