5. We have collected data on consumption efficiency, assimilation efficiency, net production efficiency, and ecological efficiency from three ecosystems.
Energy
Terrestrial Ecosystem 1.000
Lake Ecosystem 400
Stream Ecosystem 1.000
Net production available in lower trophic levels (J) Consumed energy (J) Assimilated energy (J) Net production energy (J)
250 120 50
650 450 190
260 100 40
Calculate the consumption efficiency, assimilation efficiency, net production efficiency, and ecological efficiency for each ecosystem. Give your answers as percentages.
b. Based on these calculations, why do the two aquatic ecosystems have higher ecological efficiencies than the terrestrial ecosystem?
Based on these calculations, why does the stream ecosystem have a lower ecological efficiency than the lake ecosystem?