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Question

Which is not the limitation of the ecological pyramid?

A
Pyramid does not take into account the same species belonging to two or more trophic levels.
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B
Pyramids assumes a simple food chain, something that almost never exist in nature.
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C
Pyramids accommodate a food web.
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D
Saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.
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Solution

The correct option is C Pyramids accommodate a food web.
Ecological pyramid is the graphical representation of various trophic levels of food chain designed to show their number, biomass and energy.

They are graphical representations to show the biomass or bioproductivity at each tropical level in a given ecosysytem.

There are certain limitations in the ecological pyramids:
A. Pyramids does not take into account the same species belonging to two or more trophic levels. e.g. : Sparrow and insectivorous plants.
B. It assumes a simple food chain something that almost never exist in nature.
C. It does not accommodate a food web.
D. Moreover decomposer or saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

So, the correct answer is option D.

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