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Biodiversity and populations — Question 25

QCAA 2023, Paper 1 · 6 marks

Q25 · 2023 · Paper 1Unclassified6 marks

QUESTION 25 (6 marks)

The effect of an invasive species on plant biodiversity was investigated by collecting this data from an

Biology question figure

a) Contrast species richness in areas of low invasive species cover (0—20%) with areas of high invasive species cover (>80—100%). [1 mark]

b) Draw a conclusion about the effect of the invasive species on plant biodiversity in this ecosystem. Justify your response. [2 marks]

c) Explain why having data on species richness and Simpson’s diversity index is more informative than a single measure for the purpose of this investigation. Refer to the table to support your response.

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