Distinguish between Grazing food chain and detritus food chain

7/8/2015 CBSE



Grazing
food chain and detritus food chain





























 


Grazing food chain

 


Detritus food chain



1.



In this food chain, energy is derived from the Sun.



1.



In this food chain, energy comes from organic matter (or detritus)
generated in trophic levels of the grazing food chain.



2.



It begins with producers, present at the first trophic level. The plant
biomass is then eaten by herbivores, which in turn are consumed by a
variety of carnivores.



2.



It begins with detritus such as dead bodies of animals or fallen leaves,
which are then eaten by decomposers or detritivores. These detritivores
are in turn consumed by their predators.



3.



This food chain is usually large.



3.



It is usually smaller as compared to the grazing food chain.






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