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Example Index of Diversity

SpeciesNumbers(n) found in habitatn(n-1)
A 1212(11)=132
B55(4)=20
C 2 2(1)=2
D 7 7(6)=42
E 4 4(3)=12
Σn(n-1) 208
total N = 12 + 5 + 2 + 7 + 4 = 30
d = 30(29)÷208
d =4.18 Contrast this with if there were 5 in each group:
d = 25(24)÷100
d =6.0The higher the value of d, the greater the species diversity.

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Specification: AQA Biology (7401), AS-level, 3.4.6 Biodiversity within a community. Topic: Biodiversity.

Key terms in this lesson

species
A group of organisms with similar characteristics that can interbreed to produce fertile offspring.

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