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4 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2009 · Paper 2 · Question 1(b)

With reference to Figure 1, describe how the population size of the algal species changes with the variation in nutrient concentration.

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Other parts of this question

  1. 1(a)Define what is meant by 'limiting factor' and state THREE ways in which limiting factors operate.[4 marks]
  2. 1(c)(i)For the relationship between population size of algae and nutrient concentration in Figure 1, explain using EIGHT points how nutrient variation impacts the…[8 marks]
  3. 1(c)(ii)Explain using FOUR points how the variation in the algae population impacts the population of other species in the ecosystem.[4 marks]

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