Table 1 shows the biomass of organisms at each trophic level in a marine kelp forest food chain.
| Organism | Biomass in kg\text{kg}kg |
|---|---|
| Giant Kelp | 15 000 |
| Sea Urchins | 1 800 |
| Sea Otters | 225 |
| Great White Sharks | 27 |
Calculate the percentage of the biomass of the sea urchins that is transferred to the great white sharks.
Use the equation:
percentage=biomass of great white sharksbiomass of sea urchins×100 \text{percentage} = \frac{\text{biomass of great white sharks}}{\text{biomass of sea urchins}} \times 100 percentage=biomass of sea urchinsbiomass of great white sharks×10061 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.