Question

1. what trophic level contains the greatest biomass in most ecosystems? explain why this occurs.

Explanation:

In most ecosystems, the producers (first trophic level) contain the greatest biomass. This is because they are the base of the food - chain and capture energy from the sun through photosynthesis. Energy transfer between trophic levels is inefficient, with only about 10 - 20% of energy being passed on to the next level. So, there needs to be a large amount of biomass at the producer level to support higher trophic levels.

Answer:

The first trophic level (producers) contains the greatest biomass in most ecosystems because they are the energy - capturing base of the food - chain and energy transfer between trophic levels is inefficient.