In a coastal kelp forest ecosystem, the giant kelp (primary producers) produces biomass at a rate of 3500 g m−2 year−13500\text{ g m}^{-2}\text{ year}^{-1}3500 g m−2 year−1.
Assuming an average biomass transfer efficiency of 10% between successive trophic levels, what is the approximate rate of biomass transfer that becomes incorporated into the biomass of secondary consumers?
3.5 g m−2 year−13.5\text{ g m}^{-2}\text{ year}^{-1}3.5 g m−2 year−1
35 g m−2 year−135\text{ g m}^{-2}\text{ year}^{-1}35 g m−2 year−1
350 g m−2 year−1350\text{ g m}^{-2}\text{ year}^{-1}350 g m−2 year−1
3150 g m−2 year−13150\text{ g m}^{-2}\text{ year}^{-1}3150 g m−2 year−1
61 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.