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1 markEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2011 · Paper 2 · Question 2(b)(ii)

Figure 3 shows species abundance data for four reef organisms presented as a stacked bar chart.

Calculate the percentage of the total individuals represented by Haliclona lehnerti.

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Other parts of this question

  1. 2(a)Name and describe the method you would employ to collect sampling data to determine the species diversity of non-mobile organisms on a Caribbean coral reef.[5 marks]
  2. 2(b)(i)Using Figure 3, determine the number of individuals of each of the four species.[4 marks]
  3. 2(b)(iii)Calculate the species diversity for the coral reef.[4 marks]
  4. 2(c)(i)Define what is meant by ecosystem stability.[2 marks]
  5. 2(c)(ii)Explain why an ecosystem with low species diversity may exhibit poor stability.[4 marks]

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