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4 marksEcosystem Dynamics and Community Stability

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

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

Suggest FOUR reasons to support your answer to (iii) above.

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Other parts of this question

  1. 2(a)(i)Calculate the species diversity for Ecosystem B using the equation D = N(N - 1) / Σ n(n - 1).[5 marks]
  2. 2(a)(ii)Rank the three ecosystems in DECREASING order of species diversity.[1 mark]
  3. 2(a)(iii)Which of three ecosystems is the MOST stable?[1 mark]
  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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