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Solution


Q.

In the equation

GPP - R = NPP

 

GPP is Gross Primary Productivity
NPP is Net Primary Productivity
R here is ______.                                                            [2023]
1 respiratory loss  
2 reproductive allocation  
3 photosynthetically active radiation  
4 respiratory quotient  

Ans.

(1)

Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilised by autotrophs in respiration. Gross primary productivity minus respiration losses (R) is the net primary productivity (NPP).
GPP - R = NPP