A reed bed produces 64 000 kg of new reed biomass in one year. Leaf beetles feed on the reeds, and frogs feed on the leaf beetles.
| Biomass transfer | Efficiency of transfer |
|---|---|
| Reeds to leaf beetles | 7.5% |
| Leaf beetles to frogs | 12.0% |
Calculate the mass of new frog biomass produced from the reed biomass in one year.
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.