Sea urchins feed on kelp in a coastal ecosystem.
A scientist recorded the following data.
| Measurement | Value |
|---|---|
| Area surveyed | 80 m2 |
| Dry biomass of kelp per square metre | 3.2 kg/m2 |
| Total dry biomass of sea urchins in the area surveyed | 17 920 g17\,920\text{ g}17920 g |
Calculate the percentage of the surveyed kelp biomass transferred to the sea urchins.
Show your working.
103 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.