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Biodiversity

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Question 4

Marine biologists investigated the biodiversity of fish species in a protected coral reef sanctuary. The counts of five fish species recorded during a standardized transect survey are presented in the table below:

Fish SpeciesNumber of individuals (nnn)
Clownfish15
Blue Tang35
Parrotfish22
Butterflyfish18
Damselfish30
Total (NNN)120

Use the formula:

D=1−∑(nN)2 D = 1 - \sum \left(\frac{n}{N}\right)^2 D=1−∑(Nn​)2

to calculate the Simpson's Index of Diversity (DDD) for this coral reef sanctuary. Give your response to three decimal places.

[4]
Markscheme

Biodiversity Questions

  1. A Level
  2. /Biology
  3. /Biodiversity

24 exam-style questions on OCR A A Level Biology Biodiversity. Each one has a worked solution and a mark scheme showing where the marks go.

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