KCET · BIOLOGY · STD 12 - 12. Ecosystem
Net primary productivity (NPP) in an ecosystem is
- A GPP-R=NPP
- B GPP+R=NPP
- C GPP-NPP=R
- D R-NPP=GPP
Answer & Solution
Correct Answer
(A) GPP-R=NPP
Step-by-step Solution
Detailed explanation
(A) GPP-R=NPP,
The net primary productivity is the biomass that is available for consumers (herbivores and decomposers) for consumption. Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. In respiration, an organic compound is combined with oxygen to release energy and produce carbon dioxide and water. Thus, when the carbon lost by respiration (R) is deducted from the GPP, we obtain a measure called NPP.
NPP=GPP-R
The net primary productivity is the biomass that is available for consumers (herbivores and decomposers) for consumption. Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. In respiration, an organic compound is combined with oxygen to release energy and produce carbon dioxide and water. Thus, when the carbon lost by respiration (R) is deducted from the GPP, we obtain a measure called NPP.
NPP=GPP-R
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