Many species of bacteria act as decomposers within ecosystems by breaking down organic material. Scientists analysed the energy flow within a forest ecosystem. They estimated that the energy in the decomposers' trophic level was 840 000 J m−2 yr−1840\,000\text{ J m}^{-2}\text{ yr}^{-1}840000 J m−2 yr−1. The energy within the producers' trophic level was 500% greater than that of the decomposers.
Calculate the energy in the producers' trophic level in kJ m−2 yr−1\text{kJ m}^{-2}\text{ yr}^{-1}kJ m−2 yr−1.
Calculate the percentage efficiency of the energy transfer from producers to decomposers. Give your answer to two significant figures.
