Question

Why does the energy decrease from one trophic level to other in an ecosystem?

Answer 1

because of deforestation and natural calamities earthquake most of animals died

Answer 2

A pyramid of energy represents how much energy, initially from the sun, is retained or stored in the form of new biomass at each trophic level in an ecosystem. Typically, about 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.