In a semi-desert shrubland, plant-eating insects feed on saltbush plants. Desert lizards feed on the insects.
A conservation project aims to support the production of 1.2 kg of new lizard biomass each year.
| Measurement | Value |
|---|---|
| New biomass produced by saltbush plants each year | 150 g per m2 |
| Biomass transfer efficiency from saltbush plants to insects | 8% |
| Biomass transfer efficiency from insects to lizards | 10% |
1 hectare = 10 000 m2.
Calculate the area of saltbush plants needed to support the target production of new lizard biomass. Give your answer in hectares.
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.