Q. 115.0( 2 Votes )

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Answer :

• Productivity-The rate of biomass production is called productivity.

• Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis.

• Net primary productivity (NPP)-A considerable amount of GPP is utilized by plants in respiration. Therefore the net primary productivity is the gross primary productivity minus respiration losses (R).


• For the consumption of heterotrophs (herbivores and decomposers), the available biomass is the net primary productivity.

• Secondary productivity- the rate of formation of new organic matter by consumers.

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