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5 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2010 · Paper 2 · Question 2(a)(i)

Results of population sampling of mangrove species across three ecosystems (A, B, and C) are provided in Table 1.

Calculate the species diversity for Ecosystem B using the equation D = N(N - 1) / Σ n(n - 1).

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Other parts of this question

  1. 2(a)(ii)Rank the three ecosystems in DECREASING order of species diversity.[1 mark]
  2. 2(a)(iii)Which of three ecosystems is the MOST stable?[1 mark]
  3. 2(a)(iv)Suggest FOUR reasons to support your answer to (iii) above.[4 marks]
  4. 2(b)Suggest THREE inferences that can be made about the competition taking place among the amphibians in the grassland ecosystem.[9 marks]

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