Question

Why do the number of trophic level in a food chain iso limited to 3-4.

Answer 1

At each trophic level in a food chain, a large portion of the energy is utilized for the maintenance of organisms which occur at that trophic level and lost as heat. As a result of this, organisms in each trophic level pass on less and less energy to the nexttrophic levels, than they rec

Answer 2

The other organisms in the food chain are consumers – they all get their energy and biomass by consuming (eating) other organisms. Most food chains are quite short, and they rarely consist of more than foursteps. This is because a lot of energy is lost at each step.