Study the graph below carefully.
(i) Explain the term biomass. (1 mark)
Biomass refers to the combined weight of all organisms, which is measured in terms of kilocalories of stored energy and represents the total amount of food available in an ecosystem.
(ii) Using evidence from the diagram, identify which three ecosystems are able to support more living things and how they are able to do so. (6 marks)
- The three ecosystems which are able to support more living things are:
o Tropical rainforest
o Swamp and Marsh
o Estuary (delta) - They are able to support more living things because their biomass is very high.
- The vegetation in these ecosystems provides food for animals (herbivores) that feed on them.
- The vegetation also provides nutrients to the soil which allows the vegetation to regenerate.
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