Question

why are there usually fewer predators than prey in an ecosystem? energy decreases at each trophic level predators dont compete predators are larger prey reproduce less

Explanation:

In an ecosystem, energy is transferred through trophic levels. Producers capture energy from the sun. As energy moves up to consumers (prey and then predators), only about 10 - 20% of the energy is passed on at each level. So, there is less energy available to support a large number of predators compared to prey.

Answer:

Energy decreases at each trophic level