VCE Environmental Science Practice Questions - VCE Environmental Science Units 3 & 4 (VCAA) Exam

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A conservation biologist measures Simpson's Index of Diversity (D) for two woodland patches. Site A has D = 0.85 and Site B has D = 0.32. Which of the following is the most accurate ecological interpretation of these values?

Site A has higher species diversity and evenness, meaning two randomly selected individuals are likely to belong to different species. Site B has higher species richness, indicating that a single species completely dominates the community biomass. Site A has lower ecological stability because high diversity increases vulnerability to invasive species colonization. Site B has maximum species evenness, meaning all recorded species have equal relative abundances.

Correct Answer:

Site A has higher species diversity and evenness, meaning two randomly selected individuals are likely to belong to different species.

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