IB Biology SL C4.1.2 Population Size Estimation Questions

Use sampled counts, known quadrat areas and total habitat size to scale representative observations into population estimates in IB Biology SL C4.1.2.

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Calculate or interpret a population estimate by scaling the mean number or density counted in representative sample areas to the total habitat area.

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In an area of forest measuring 100 m by 100 m , samples were taken to estimate the number of silver maple (Acer saccharinum) trees in the forest. The number of trees counted in each of five areas of $400 \mathrm{~m}^{2}$ was recorded.

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Approximately how many silver maple trees are in the $10000 \mathrm{~m}^{2}$ area of forest?

125

625

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IB Biology SL C4.1.2 Population Size Estimation Questions question 1