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3 marksEcology, Niches, and Interactions

CAPE Environmental Science Unit 1 · 2017 · Paper 2 · Question 2(a)(iii)

Two groups of students were taken to a natural savannah ecosystem where they determined the distribution of three plant species. Group I used the line transect method while Group II used the quadrat method. Table 1 shows data for Group I and Table 2 shows data for Group II.

The results in Table 2 show a type of interaction between Species A and Species B. Use the data in the table to explain this type of interaction.

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Other parts of this question

  1. 2(a)(i)Explain the difference between the methods used by Group I and Group II respectively.[3 marks]
  2. 2(a)(ii)Using the data collected by Group II, calculate the estimated density for Species A and the percentage frequency of Species B.[6 marks]
  3. 2(b)(i)Describe how the data in Tables 1 and 2 may be used to provide information on the distribution of the three plant species.[4 marks]
  4. 2(b)(ii)Explain two ways in which human activities can disrupt the integrity of natural ecosystems.[4 marks]

More practice: the rest of this paper · more Ecology, Niches, and Interactions questions · all CAPE Environmental Science Unit 1 past papers