Biodiversity & Conservation

MarLIN Glossary

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Diversity
The state or quality of being different or varied (from Makins , 1991). 1) In relation to species, the degree to which the total number of individual organisms in a given ecosystem, area, community or trophic level is divided evenly over different species, i.e. measure of heterogeneity. Species diversity can be expressed by diversity indices, most of which take account of both the number of species and number of individuals per species (Based on Baretta-Bekker et al., 1992). Cf. 'evenness'; 'richness'. 2) In conservation assessment - an assessment of the richness of different types in a location (which can be large or small) including the number of different biotopes and numbers of species. The number of species present in an example of a particular biotope.

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Glossary references