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Ecosystems, interdependence and field sampling

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Question 28

An ecologist wants to estimate the total population of a rare orchid species (Anacamptis morio) in a rectangular meadow measuring 80 m×60 m80\text{ m} \times 60\text{ m}80 m×60 m.

The ecologist uses random sampling with a square quadrat of side length 0.5 m. A total of 30 quadrats are placed at random coordinates across the meadow, and a total of 45 orchids are recorded within these quadrats.

Which of the following is the best estimate for the total population of Anacamptis morio in the meadow?

7,2007,2007,200

14,40014,40014,400

28,80028,80028,800

115,200115,200115,200

Ecosystems, interdependence and field sampling Questions

  1. GCSE
  2. /Biology
  3. /Ecosystems, interdependence and field sampling