Q. Given flowchart represents grazing and detritus food chain.
Grazing food chain: Grass Rabbit Lion
Detritus food chain: Dead leaves Wood louse Black bird
The organisms which constitute the first trophic level of the grazing food chain and the detritus food chain are respectively,

 791  162 Ecosystem Report Error

Solution:

In grazing food chain, green plants (producers) constitute the first trophic level. In detritus food chain, wood louse constitutes the first trophic level.