BRAINCAKEIndex of Diversity
An index of diversity is a single number that describes the biodiversity of a habitat, taking into account both the number of species (species richness) and the number of individuals of each species (abundance). Edexcel uses:
D = N(N − 1) / Σn(n − 1)
where D = index of diversity, N = total number of organisms of all species, n = number of organisms of each species, and Σ means 'the sum of'.
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Key terms in this lesson
- species richness
- The number of different species present in a habitat or area.
More in Biodiversity
- The Importance of Biodiversity
- Species Richness
- Endemic Species
- Species Abundance
- Biodiversity of Different Habitats
- Changing Biodiversity
- Allele Frequency
- Measuring Genetic Biodiversity
All 22 lessons in Biodiversity · All Edexcel AS-level Biology topics