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6 marksEcosystem Dynamics and Community Stability

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

Figure 2 illustrates the change in population size of iguanas in a mangrove habitat over a 12-year period.

Discuss TWO factors that may influence population size at the carrying capacity.

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Other parts of this question

  1. 1(a)(i)Name the type of ecological pyramid shown in Figure 1.[1 mark]
  2. 1(a)(ii)Use the information in Figure 1 to calculate the amount of energy that is available at the level of the producers. Show all working.[3 marks]
  3. 1(b)Outline THREE ways in which the phosphorus cycle may be impacted by the activities of humans.[6 marks]
  4. 1(c)(i)What is the population of iguanas in Year 2?[1 mark]
  5. 1(c)(ii)Define the term 'carrying capacity' AND use Figure 2 to estimate the carrying capacity of the mangrove habitat.[3 marks]

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