Metabolic balance of the open sea

@article{Karl2003MetabolicBO,
  title={Metabolic balance of the open sea},
  author={David M Karl and Edward A Laws and Paul H. Morris and Peter J. leB. Williams and Steven Emerson},
  journal={Nature},
  year={2003},
  volume={426},
  pages={32}
}
The rise of oxygenic photosynthesis nearly three billion years ago led to the accumulation of free oxygen and to the subsequent diversification of life on Earth; today, nearly half of all oxygen production derives from the photosynthetic activities of marine phytoplankton1. The conclusion that the open sea –– and therefore much of our planet's surface –– is in a net heterotrophic metabolic state2,3,4 is enigmatic and is a first-order question in the global carbon cycle, as discussed by del… CONTINUE READING
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