Depth distribution of short-chain organic acid turnover in Cape Lookout Bight sediments

Details Depth distribution of short-chain organic acid turnover in Cape Lookout Bight sediments Depth distribution of short-chain organic acid turnover in Cape Lookout Bight sediments

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50...99s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 50, Issue 1, pp.99-105

Physics

Scientific paper

The midsummer depth distribution of acetate, propionate, butyrate, isobutyrate, lactate, and pyruvate turnover rates was measured in Cape Lookout Bight, North Carolina sediments. Acetate and pyruvate turnover rates were the highest measured; the range of rates measured were 170-420 mole 1 s -1 h -1 for acetate, and 160-670 mol 1 s -1 h -1 for pyruvate. Lactate, propionate, butyrate, and iso-butyrate together were precursors of less than 25% of the acetate metabolized, suggesting that most of the acetate was produced from the direct fermentation of larger organics, with pyruvate as a possible important intra and/or extra-cellular intermediate. In general, surface sediments displayed high turnover rates and low concentrations; in deeper sediments turnover rates were roughly proportional to the corresponding concentrations.

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