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9700 · 18.2

Biodiversity

Cambridge 9700 Paper 4 — Biodiversity (18.2). This lesson covers the three levels of biodiversity, endemism, biodiversity hotspots, and the calculation of Simpson's Index of Diversity. It includes worked examples and flashcards to solidify understanding.

Need to know

What you need to know

  • The value of D ranges from 0 to 1.
  • A value close to 1 indicates high biodiversity (high species richness and evenness).
  • A value close to 0 indicates low biodiversity (the habitat is dominated by one or a few species).
  • A higher D value signifies a more stable ecosystem, better able to withstand change.

Explanation

Biodiversity

  1. The value of D ranges from 0 to 1.
  2. A value close to 1 indicates high biodiversity (high species richness and evenness).
  3. A value close to 0 indicates low biodiversity (the habitat is dominated by one or a few species).
  4. A higher D value signifies a more stable ecosystem, better able to withstand change.
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