期刊
GEOPHYSICAL RESEARCH LETTERS
卷 38, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2011GL049725
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资金
- Netherlands Organisation for Scientific Research through the Darwin Center for Biogeosciences
Organic matter recycling releases ammonium, and under anoxic conditions, other reduced metabolites that can be used by chemoautotrophs to fix inorganic carbon. Here I present an estimate for the global rate of oceanic carbon fixation by chemoautotrophs (0.77 Pg C y(-1)). Near-shore and shelf sediments (0.29 Pg C y(-1)) and nitrifiers in the euphotic zone (0.29 Pg C y(-1)) and the dark ocean (0.11 Pg C y(-1)) are the most important contributors. This input of new organic carbon to the ocean is similar to that supplied by world-rivers and eventually buried in oceanic sediments. Chemoautotrophy driven by organic carbon recycling is globally more important than that fuelled by water-rock interactions and hydrothermal vent systems. Citation: Middelburg, J. J. (2011), Chemoautotrophy in the ocean, Geophys. Res. Lett., 38, L24604, doi: 10.1029/2011GL049725.
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