Collaborating robots sample the primary production in the ocean

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Martin Ludvigsen1

  • 1Department of Marine Technology, Norwegian University of Science and Technology, Otto Nielsensvei 10, 7491 Trondheim, Norway.

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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.
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