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6 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2015 · Paper 2 · Question 2(b)(iii)

Table 1 shows the results from an ecological study using indicator species to investigate water quality in three aquatic environments, A, B and C.

Explain, using six points, how species diversity influences ecosystem stability.

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Other parts of this question

  1. 2(a)Outline the role of natural selection in the evolution of a species.[3 marks]
  2. 2(b)(i)State FOUR deductions that can be made from the information provided in Table 1.[4 marks]
  3. 2(b)(ii)State which of the three environments is expected to have the GREATEST species diversity AND give ONE reason to support your answer.[3 marks]
  4. 2(c)Use the information provided in Table 2 to calculate the population size of the manatees.[4 marks]

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