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5 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2012 · Paper 2 · Question 2(c)(iv)

Figure 2 displays the current forest area as a percentage of original forest cover in Guyana (85%), Haiti (5%), and Dominica (65%).

Justify your response in (c)(iii).

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Other parts of this question

  1. 2(a)Distinguish between 'gaseous biogeochemical cycles' and 'sedimentary biogeochemical cycles'. In your response give ONE example of a gaseous biogeochemical…[4 marks]
  2. 2(b)(i)State the ten per cent rule for the transfer of energy from one trophic level to the next in an ecosystem.[2 marks]
  3. 2(b)(ii)On the basis of the rule stated in (b)(i), explain why it will be more energy efficient for humans to eat corn rather than beef.[3 marks]
  4. 2(c)(i)Showing how you arrived at your answer, determine which TWO countries together have a combined total of 50% deforestation.[4 marks]
  5. 2(c)(ii)Based ONLY on the information presented in Figure 2, which country would most likely have experienced the greatest loss of biodiversity?[1 mark]
  6. 2(c)(iii)Identify the country where secondary ecological succession is LEAST likely to occur.[1 mark]

More practice: the rest of this paper · more Ecosystem Dynamics and Community Stability questions · all CAPE Environmental Science Unit 1 past papers