Metabolism of Acetate, Methanol, and Methylated Amines in Intertidal Sediments of Lowes Cove, Maine †

摘要: The fates and the rates of metabolism acetate, trimethylamine, methylamine, methanol were examined to determine significance these compounds as in situ methane precursors surface sediments an intertidal zone Maine. Concentrations potential generally 8 h) characterized by formation both 14CH4 14CO2. Ratios 14CH4/14CO2 from [14C]trimethylamine methylamine uninhibited indicated that a significant fraction substrates catabolized via non-methanogenic process. Data inhibition experiments involving sodium molybdate 2-bromoethanesulfonic acid supported this interpretation. [14C]methanol was oxidized relatively slowly compared with other mainly Results suggested primarily through sulfate reduction. In Lowes Cove sediments, trimethylamine accounted for 35.1 61.1% total production.