Simpson's index of biodiversity

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Last updated 1:37 PM on 5/12/26
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6 Terms

1
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what does Simpson’s Index of diversity give us?

gives a quantitative measure of the biodiversity of an area

2
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what is diversity a good measure of?

  • the stability of an ecosystem

  • greater diversity = greater stability

3
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what does Simpsons diversity index give us a number in between?

gives a community number (D) between 0 and 1 that indicates its diversity

4
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Would a community with low diversity, have a high or low value of D?

low value of D

5
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what things does Simpson’s diversity index take into account?

  • species richness and evenness

  • requires the number of individuals of each species in a habitat in order to be calculated

6
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what is the equation for Simpson’s diversity index?

where:

n = number of individuals of each species

N = total number of individuals in the area

and (n/N)² is calculated separately for each species and then added up

<p>where: </p><p>n = number of individuals of each species </p><p>N = total number of individuals in the area </p><p>and (n/N)² is calculated separately for each species and then added up </p>