Who are related to first trophic level?

What is trophic level ?

Trophic Levels

(a) What is a trophic level in an ecosystem ? What is 'standing crop' with reference to it? (b) Explain the role of the 'first trophic level' in an ecosystem. (c) How is the detritus food chain connected with the grazing food chain in a natural ecosystem ?

State the difference between the first trophic levels of detritus food chain and grazing food chain.

Do autotrohs constitute the first trophic level in an ecosystem ?

What is the difference between the food habits of organisms belonging to the first and the third trophic levels ? Give one example each of the organisms belonging to these two trophic levels.