In an aquatic ecosystem,at which trophic leve | vedclass

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(A) In an ecosystem,the trophic levels are defined based on the source of nutrition.$T_1$ represents the producers (autotrophs).$T_2$ represents the p

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$T_1$

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(A) In an ecosystem,the trophic levels are defined based on the source of nutrition.$T_1$ represents the producers (autotrophs).$T_2$ represents the primary consumers (herbivores).$T_3$ represents the secondary consumers (primary carnivores).$T_4$ represents the tertiary consumers (secondary carnivores).Detritivores (decomposers) feed on dead organic matter (detritus). In the context of energy flow models,they are often considered to operate at all trophic levels,but in standard ecological classification for food chains,they are frequently associated with the $T_1$ level or considered as a separate decomposer pathway. However,in many standard textbook contexts,detritivores are placed at the $T_1$ level because they derive energy from the breakdown of organic matter produced by primary producers.

Column-$I$	Column-$II$
$P$. Herbivores	$I$. Directly dependent on plants
$Q$. Carnivores	$II$. Indirectly dependent on plants
$R$. Saprophytes (Fungi)	$III$. Dependent on dead or decaying matter

In an aquatic ecosystem,at which trophic level do detritivores belong?

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Column-$I$ Column-$II$

$P$. Herbivores $I$. Directly dependent on plants

$Q$. Carnivores $II$. Indirectly dependent on plants

$R$. Saprophytes (Fungi) $III$. Dependent on dead or decaying matter

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