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1 markEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2007 · Paper 2 · Question 3(a)

Figure 2 illustrates a typical sigmoid population growth curve with stages AB, BC, and CD.

State the name of ANY ONE of the growth stages, AB, BC or CD, shown in Figure 2.

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Other parts of this question

  1. 3(b)Outline the features of EACH growth stage, AB, BC and CD, shown in Figure 2.[9 marks]
  2. 3(c)Explain how environmental resistance influences the shape of the curve from A to D in Figure 2.[6 marks]
  3. 3(d)(i)Suggest ONE environmental condition in the ecosystem that would cause growth along interval DE.[2 marks]
  4. 3(d)(ii)Suggest ONE environmental condition in the ecosystem that would cause growth along interval DF.[2 marks]

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