GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the gross primary productivity minus plant respiration
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the productivity at top consumer level minus respiration at all levels
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the primary productivity at herbivore level
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the primary productivity at consumer level
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Detailed explanation-1: -Net primary productivity, or NPP, is gross primary productivity minus the rate of energy loss to metabolism and maintenance. In other words, it’s the rate at which energy is stored as biomass by plants or other primary producers and made available to the consumers in the ecosystem.
Detailed explanation-2: -Net primary productivity(NPP) is the amount of organic matter stored by producers per unit area per unit time. Gross primary productivity minus respiration losses is the net primary productivity i.e, , NPP=GPP−R.
Detailed explanation-3: -The total stored energy in the form of organic matter is called net primary productivity (NPP). The rate of energy production by green plants during photosynthesis is called as gross primary production (GPP). Net primary production is calculated after deducting the loss of organic matter during respiration.
Detailed explanation-4: -Net primary productivity (NPP) is the rate at which all plants in an ecosystem produce net useful chemical energy. While gross primary productivity (GPP) is the rate at which primary producers save and collect biomass for energy conservation. NPP is the difference between GPP and cellular respiration.
Detailed explanation-5: -Net Primary Production (NPP) = GPP – RA The amount of organic carbon produced by plants that is not consumed by their own respiration. It is the increase in the plant biomass in the absence of herbivores.