Question

Which of the following limits the number of trophic levels maintained by an ecosystem?

• A. The number of species
• B. The population size
• C. The loss of potential energy
• D. The number of individuals
• E. The hours of sunshine

Answer 1

The correct option is C The loss of potential energy

With each trophic level, only 10% potential energy is transferred and 90% is lost as heat in respiration. The longer the food chain, the lesser is the energy transfer efficiency. To increase the energy transfer efficiency, food chains must be smaller with a limited number of trophic levels. Thus, the correct answer is C.