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Question
Which is correct about GPP and NPP in ecosystem?
Which is correct about GPP and NPP in ecosystem?
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Solution
The correct option is A NPP = GPP – Plant respiration
In a food chain, energy stored at the producer level is called as primary productivity (PP).
Energy stored at the consumer level is called as secondary productivity. It is the rate of energy storage at the consumer level.
Consumer-level includes herbivores, carnivores and decomposers. Gross primary productivity (GPP) is the rate of photosynthesis.
Net primary productivity (NPP) is the rate of storage of organic matter except which is utilized for the respiration by plants.
Hence, we can say that NPP = GPP - plant respiration. It is the total biomass available for consumers.
Thus, the correct answer is 'NPP = GPP - Plant respiration.'
In a food chain, energy stored at the producer level is called as primary productivity (PP).
Energy stored at the consumer level is called as secondary productivity. It is the rate of energy storage at the consumer level.
Consumer-level includes herbivores, carnivores and decomposers. Gross primary productivity (GPP) is the rate of photosynthesis.
Net primary productivity (NPP) is the rate of storage of organic matter except which is utilized for the respiration by plants.
Hence, we can say that NPP = GPP - plant respiration. It is the total biomass available for consumers.
Thus, the correct answer is 'NPP = GPP - Plant respiration.'
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