What is the difference between net primary productivity and net primary production?
Gross primary production (GPP) is the total rate at which material is produced and net primary production (NPP) is the rate at which material is accumulated in excess of respiration. In other words, NPP is GPP minus respiration. Net primary production is directly related to ecosystem conditions.
What is the difference between primary production and primary productivity?
Summary. Primary producers, which are usually plants and other photosynthesizers, are the gateway through which energy enters food webs. Productivity is the rate at which energy is added to the bodies of a group of organisms, such as primary producers, in the form of biomass.
What is meant by net primary productivity?
The maps above show one way to monitor the carbon “metabolism” of Earth’s vegetation. They show net primary productivity, which is how much carbon dioxide vegetation takes in during photosynthesis minus how much carbon dioxide the plants release during respiration (metabolizing sugars and starches for energy).
What is GPP and NPP in an ecosystem?
While gross primary production (GPP) is the total influx of carbon into an ecosystem through the photosynthetic fixation of CO2, net primary production (NPP) is this gross carbon influx discounted for plant respiratory costs of growth and maintenance.
What is the difference between primary productivity and secondary productivity?
So the rate of production of organic energy in an autotrophic organism in an ecosystem is called primary productivity. So, the primary productivity is the production of organic matter by the producers while secondary productivity is the production of the organic matter by the consumers.
What is primary productivity example?
The primary productivity of an ecosystem is defined as the speed at which the solar energy is turned into an organic substance by chlorophyll in the photosynthesis. An example is that of estuaries, one of the most productive ecosystems in the world. …
What is the difference between gross primary production GPP and net primary production NPP quizlet?
Gross primary productivity (GPP): the rate at which energy is captured and assimilated by producers in an area. Net primary productivity (NPP): the rate of energy that is assimilated by producers and converted into producer biomass in an area; includes all energy that is not respired: …
How are gross and net production different?
Gross production is the total amount of organic material produced through photosynthesis. Net production is the gross production of organic matter minus the reduction in organic matter due to respiration.
What is net secondary productivity?
NET SECONDARY PRODUCTIVITY. (NSP) • The gain by consumers in energy or biomass. remaining per unit area per unit time after. respiratory losses.
How do you calculate net productivity?
You can see that your bank account balance is determined as follows: Your Net production is equal to your Gross Production minus Respiration, which is the same as the equation above that states the Net Primary Production (NPP) = the Gross Primary Production (GPP) minus Respiration (R).
How do you measure net primary productivity?
Primary Productivity. We can measure net productivity directly by measuring oxygen production in the light, when photosynthesis is occurring. We can also measure respiration without photosynthesis by measuring O 2 consumption in the dark, when photosynthesis does not occur. Since net productivity = gross productivity − respiration,…
What does net primary productivity result in?
Primary productivity is the process resulting from photosynthetic activity of the plants and determines biomass accumulation in forests. Net primary productivity (NPP) represents the difference between gross photosynthesis of plant foliage and energy losses due to respiration and mortality of plant tissues.
What does net primary production refer to?
Net primary production is the rate at which all the plants in an ecosystem produce net useful chemical energy; it is equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (GPP) and the rate at which they use some of that energy during respiration.
What is gross primary productivity?
Primary producers (usually plants and other photosynthesizers) are the gateway for energy to enter food webs.