Question

What are the number of trophic level in a food chain is limited to 3-4?

Answer 1

Since very little energy is available for the next level of consumers, food chains generally consist of only three or four steps. The loss of energy at each level is so great that very little usable energy remains after four trophic levels.

Answer 2

There is a loss of energy as we go from one trophic level to the next or towards (or higher side). The limits the number of trophic levels in a food chain. As very less energy is available for the next level of consumers, food change in release consists of only three or four steps. The loss of energy at each step is so high that very little usable energy remains after four trophic levels.