Question

In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?

Grass → Grasshopper → Frog → Snake → Hawk

Options

• 5 kJ

• 50 kJ

• 500 kJ

• 5000 kJ

Answer 1

5000 kJ

Explanation - 

In an ecosystem, only 10 percent of the energy available at each trophic level is passed on to the next trophic level of the food chain. Thus, if 5 kJ energy is available at the fourth trophic level, 10 percent more that is, 50 kJ energy will be available at the third trophic level, 500 kJ energy will be available at the second trophic level and 5000 kJ energy will be available at the first trophic level or producer level.