IB ESS SL 2.3.6 Carbon Stores, Sinks and Sources Question Bank

Distinguish carbon stores, sinks and sources using evidence from ecosystems.

Exam points

identify the relevant store, flow or process
trace matter through the biogeochemical cycle
evaluate the ecological or climate consequence of the change

[Maximum number: 1]

Figure A simplified food web in a kelp forest ecosystem

Figure Kelp forest ecosystems with and without the presence of sea otters

The arrows indicate the flow of carbon between the atmosphere and the carbon stored in kelp.

Calculate the difference between carbon stored in kelp in the ecosystem with and without sea otters.

$180\left(\mathrm{~g} \mathrm{C} \mathrm{m}^{-2}\right)-14\left(\mathrm{~g} \mathrm{C} \mathrm{m}^{-2}\right)=166\left(\mathrm{~g} \mathrm{C} \mathrm{m}^{-2}\right)$ ;

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2.3.6—Ecosystems as carbon stores/sinks/sources question 1