Question

How much energy is available at the third trophic if the first trophic Level has aout 300,000 kJ available energy and the loss rate between trophic levels is 90 percent

Answer 1

3,000 kilijoules.

You go from 300,000 at the first trophic level to 30,000 at the second trophic level, and finally 3,000 at teh third.