primary production

(redirected from Net primary productivity)
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primary production

the production by living organisms (AUTOTROPHS) of organic material from inorganic sources. Gross primary production is the total amount of organic material synthesized in a given time, whereas net primary production is the amount of organic material formed in excess of that used in respiration. Compare SECONDARY PRODUCTION.
References in periodicals archive ?
There were temporal fluctuations of primary production (Table 4), the highest values of gross primary productivity (GPP) rates were recorded in dry weather conditions in both lakes, while the lowest values were during mix weather conditions in both lakes, and net primary productivity.
One option to increase actual SOC in this region may be to promote land-use systems which support greater net primary productivity and have potential to increase allocation of SOC to depth (e.
1993) pointed out that global climate change and increasing concentration of atmospheric CO2 have likely to affect the net primary productivity (NPP).
Our primary objective was to determine if greater flood connectivity within the bottomland forest elicited higher aboveground net primary productivity (ANPP).
Interrelationships among the edaphic and stand characteristics, leaf area index, and aboveground net primary productivity of upland forest ecosystems in north central Wisconsin.
If 80 percent of world's population could survive the initial carnage of a strategic nuclear battle, Harwell says, it's important to know whether the net primary productivity of plant systems would be able to sustain them.
Scientists use the global biosphere measurements to study the planet's net primary productivity - the amount of carbon that plants use to grow.
An extensive compilation of nearly 700 field estimates of net primary productivity of natural and agricultural ecosystems worldwide was synthesized in Germany in the 1970s and early 1980s.
Our study shows the extent and severity of land degradation measured in terms of loss of net primary productivity, making allowance for climatic variability," he added.