Any food chain in an ecosystem starts from?

Show schematically the grazing food chains in an ecosystem.

Food chain in an aquatic ecosystem

Food chain in a forest ecosystem:

What do pyramids and food chain indicate in an ecosystem?

What do pyramids and food chain indicate in an ecosystem?

(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 ?

Draw diagrams to represent a common food chain in a grassland ecosystem .