Question

Differentiate between grazing food chain and detritus food chain. OR Ecological pyramids are widely accepted but they still have some limitations.…

Accepted Answer

Grazing food chain Detritus food chain − Starts from producers. − Starts from Detritus / decomposers / dead organic matter. − It is the major conduit for energy flow in aquatic ecosystem − It is the major conduit for energy flow in terrestrial ecosystem − Less fraction of energy flow (because food chain is large) − Larger fraction of energy flow (because food chain is smaller) OR (b) − It does not take into account the same species belonging to two or more trophic levels. − It assumes a simple food chain something that almost never exists in nature − It does not accommodate a food web. − Saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem. (a)

Differentiate between grazing food chain and detritus food chain.

Marking-scheme solution

More from Ecosystem

(a)OR(b)Differentiate between grazing food chain and detritus food chain.Ecological pyramids are widely accepted but they still have some limitations. Write any two limitations.

Marking-scheme solution

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Differentiate between grazing food chain and detritus food chain.