Match List I with List II : List I List II A. Productivity I. Gross primary productivity minus respiration losses B. Net primary productivity II. Rate of formation of new organic matter by consumers C. Gross primary productivity III. Rate of biomass production D. Secondary productivity IV. Rate of production of organic matter during photosynthesis Choose the correct answer from the options given below :
A. A-III, B-I, C-IV, D-II
Productivity is defined as the rate of biomass production. Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. Net primary productivity (NPP) is the gross primary productivity minus respiration losses (R), which is the available biomass for the consumption to heterotrophs. Secondary productivity is defined as the rate of formation of new organic matter by consumers. Therefore, the correct matching is A-III, B-I, C-IV, D-II. Answer: A-III, B-I, C-IV, D-II
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