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4 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2007 · Paper 2 · Question 2(c)(i)

Table 1 displays fish population sampling data across three streams (A, B, and C).

Calculate the species diversity for Stream A using the formula D = N(N - 1) / Σ n(n - 1).

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Other parts of this question

  1. 2(a)(i)What is meant by ecological succession?[2 marks]
  2. 2(a)(ii)What is meant by a climax community?[2 marks]
  3. 2(b)Outline THREE differences between 'primary ecological succession' and 'secondary ecological succession'.[6 marks]
  4. 2(c)(ii)Rank the THREE streams in decreasing order of species diversity.[2 marks]
  5. 2(c)(iii)Which of the three streams, A, B or C, is the most stable?[1 mark]
  6. 2(c)(iv)Justify your answer to 2(c)(iii).[3 marks]

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