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  • (a)     What is the primary productivity of an ecosystem and how is ti expressed? (b)     Explain what does the equation given below show:           NPP = GPP - R

(a)     What is the primary productivity of an ecosystem and how is ti expressed?

(b)     Explain what does the equation given below show:

          NPP = GPP - R

 

 

 

 
 
 
 
 

Answers (1)

(a)  Primary productivity is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. It is expressed in terms of weight (g-2 ) or energy (kcal m-2 ).

(b)  NPP=GPP-R

Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP). Net primary productivity is the available biomass for the consumption of heterotrophs (herbivores and decomposers).

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Priyanka Kumari

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