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Nature 444, 752-755 (7 December 2006) | doi:10.1038/nature05317;

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Climate-driven trends in contemporary ocean productivity

Contributing roughly half of the biosphere|[rsquo]|s net primary production (NPP), photosynthesis by oceanic phytoplankton is a vital link in the cycling of carbon between living and inorganic stocks. Each day, more than a hundred million tons of carbon in the form of CO2 are fixed into organic material by these ubiquitous, microscopic plants of the upper ocean, and each day a similar amount of organic carbon is transferred into marine ecosystems by sinking and grazing.

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