Name an organism found as secondary carnivore in an aquatic ecosystem.
In aquatic ecosystem foodweb can be drawn as follows: Producer (phytoplankton) $\rightarrow$ Primary consumer (zooplankton) $\rightarrow$ Secondary consumer (small fish and water bug) (first carnivore) $\rightarrow$ Tertiary consumers (Secondary carnivores big fishes : Birds living in water like Crane and Duck.
Therefore big fishes and birds seen in water like Crane and Duck which a acquires position as tertiary consumers or secondary carnivores.
Find an incorrect statement for $DFC$
$A$ : Detrivores and decomposers hold up a part of nutrients contained in detritus.
$R$ : Immobilised nutrients cannot be available for solubilisation after the death of saprotrophs.
Choose incorrect option w.r.t. amount of living material present in different trophic levels at a given time
Which one of the following system constitutes the primary producers
Biological equilibrium is an equilibrium among the