A food chain in a heathland is:
heather plants → moth larvae → insect-eating birds
The table shows the dry biomass of the first two trophic levels.
| Organisms | Dry biomass in g |
|---|---|
| Heather plants | 8.0 × 105 |
| Moth larvae | 6.4 × 104 |
The efficiency of biomass transfer from the moth larvae to the insect-eating birds is the same as the efficiency from the heather plants to the moth larvae.
Calculate the predicted dry biomass of the insect-eating birds.
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.