In a simple food chain with 10-percent efficiency, a net primary production rate at the first trophic level is 10,000 units. How many units are available to the fourth trophic level?

Question

Quizplus · Accepted Answer

In a 10% efficient food chain, only 10% of the energy is passed on from one trophic level to the next. Therefore, the amount of energy available to the fourth trophic level is 10,000 x 0.1 x 0.1 x 0.1 = 10.

In a Simple Food Chain with 10-Percent Efficiency, a Net