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Observation and simulation of net primary productivity in Qilian Mountain, western China

Y Zhou1, Q Zhu, J M Chen

  • 1College of Geography and Remote Sensing, Beijing Normal University, China. ilikespoon@mail.uri.edu

Journal of Environmental Management
|November 30, 2006
PubMed

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Primary Production01:06

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.