IB ESS HL 2.3.5 Carbon Sequestration Questions

[Maximum number: 2]

Ecosystem category	Ecosystem	Soil organic carbon (metric ton carbon per hectare)	Living biomass (metric ton carbon per hectare)	Total (metric ton carbon per hectare)
Terrestrial forest ecosystems	Boreal forest	150	94	244
Terrestrial forest ecosystems	Tropical forest	83	167	250
Coastal marine ecosystems	Mangroves	1030	464	1494
Coastal marine ecosystems	Tidal marsh	920	31	951
Coastal marine ecosystems	Seagrass meadows	608	10	618

Figure:Carbon storage in different ecosystems

With reference to Figure 6, outline the effectiveness of mangroves and tropical rainforests in the mitigation of climate change.

mangroves/tropical rainforest mitigate climate change/reduce $\mathrm{CO}_{2}$ in the atmosphere by absorbing $\mathrm{CO}_{2}$ ;
mangroves sequester/remove a greater amount of $\mathrm{CO}_{2}$ (per unit area) than the other ecosystems/tropical forest/ mangroves are more efficient at storing carbon than tropical forests / mangroves are more effective carbon sinks than tropical forests;
tropical forest hold more carbon in their living biomass / mangroves hold more carbon in the soil;
both tropical rainforest and mangroves store the highest amount of $\mathrm{CO}_{2}$ within their living biomass for their own ecosystem category;
mangroves hold approximately 1500 metric ton carbon per hectare / tropical forest hold approx 230 metric ton carbon per hectare;
tropical forests may remove less $\mathrm{CO}_{2}$ per unit area but occupy a far greater area globally / mangroves remove more $\mathrm{CO}_{2}$ per unit area but occupy less area globally;

Marking guidance:

Accept quantification without units.

IB ESS HL 2.3.5 Carbon Sequestration Topic Practice

Question 1