Question

Why is the length of a food chain in an ecosystem generally limited to 3-4 trophic levels?

Answer 1

Answer:

In a food chain a trophic level is a position occupied by organism with the same nutritional relationship with organisms on the other trophic levels. Primary producers are an example of a trophic level as they relate to primary consumers as a food source.

Explanation:

As 90% energy is lost in the form of heat from one trophic level to another, residual energy decreases drastically within 2-3 trophic levels.