Question

There are generally a greater number of individuals at the lower trophic levels in the food chain why

Answer 1

The first trophic level consists of producers which have a large population.It is important to have more individuals in the lower trophic levels to maintain the balance of the ecosystem.If the primary consumers were more than the producers they would starve to death and thus imbalance in the ecosystem.With increase in trophic level the complexity increases and population decreases.
Moreover,there is a loss of energy with increase in trophic levels(10%).Thus it is important to have large population in lower trophic levels.

Answer 2

Answer:

Greater number of individuals present at the lower tropic levels