Chemoautotrophy in the ocean

Details Chemoautotrophy in the ocean Chemoautotrophy in the ocean

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3824604m&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 24, CiteID L24604

Mathematics

Logic

Biogeosciences: Carbon Cycling (4806), Oceanography: Biological And Chemical: Benthic Processes, Benthos (0408), Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912), Oceanography: Biological And Chemical: Chemosynthesis, Oceanography: Biological And Chemical: Marine Organic Chemistry (0470, 1050)

Scientific paper

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.

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