Ecologists studied biomass transfer in this woodland food chain:
rowan trees → deer → lynx
The table shows data collected during one year.
| Transfer | Biomass available at the lower trophic level in kg | Biomass transferred to the next trophic level in kg | Percentage of eaten biomass egested |
|---|---|---|---|
| Rowan trees to deer | 24 000 | 1 680 | 36 |
| Deer to lynx | 1 680 | 252 | 8 |
Calculate the efficiency of biomass transfer for each of the two transfers.
Explain the difference between the two efficiencies. Use the data about egestion in your answer.
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.