Grazing food chain : In grazing food chain, green plants constitute the first step. The The plant are producers which are eaten by herbivores, which are futher eaten by carnivores .
Example : grassland Ecosystem
grasses `to`herbivores `to` carnivores
Detritus food chai : It begins with docomposers .The detritus is eaten by decomposers like bacteria and fungi. They release the inorganic elements into the ecosystem by breaking down the complex organic matter . e. g. Mangrove trees.
Detritus `to` Decomposers `to` Secondary consumers (larvea`//` nematodes)
`(Protozoa// bacteria or fungi)`