IB Biology SL C4.2.15 Primary Production Questions

Use the gross-production equation to calculate net primary production and interpret production changes across depths, seasons and ecosystems in IB Biology SL C4.2.15.

Exam points

Distinguish gross primary production from net primary production by using the relationship gross production = net production + respiration.
Calculate or interpret primary-production data for named ecosystems, depths, seasons or environmental treatments using units and supplied values.

[Maximum number: 1]

Calculate the gross production of an aquatic ecosystem that has a net primary production of $96 \mathrm{~kJ} \mathrm{~m}^{-2} \mathrm{y}^{-1}$ and a respiration rate of $45 \mathrm{~kJ} \mathrm{~m}^{-2} \mathrm{y}^{-1}$ , giving the units.

$\quad(=96+45)=141 \mathrm{~kJ} \mathrm{~m}^{-2} \mathrm{yr}^{-1}$

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IB Biology SL C4.2.15 Primary Production Questions question 1