Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
Phytoplankton
Fish
Zooplankton
Frog
In a pond ecosystem, fishes occupy the more than one trophic levels.
$A$ : 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.
Maximum solar energy may be trapped by
Secondary productivity is rate of formation ofnew organic matter by
Why is the rate of assimilation of energy at the herbivore level called secondary productivity ?
Secondary productivity is
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