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- W2045621444 abstract "Abstract To clarify the anaerobic microbial interactions in the process of carbon mineralization in marine eutrophic environments, the microbial sulfate reduction and methane production rates were examined in coastal marine sediments of Ise Bay, Japan, in autumn 1990. Sulfate reduction rates (51–210 nmol ml −1 day −1 at 24°C) were much higher than the methane production ones (<1.78 nmol ml −1 day −1 ) in the surface sediments (top 2 cm) at the six stations surveyed (water depth: 10.7–23.3 m). Substrates for sulfate‐reducing bacteria (SRB) were estimated after the addition of a specific inhibitor for SRB (20 mmol l −1 molybdate) into the sediment slurry, from the substrate accumulation rates. In the presence of the inhibitor, sulfate reduction was completely stopped and volatile fatty acids (mainly acetate) were accumulated, although hydrogen was not. Methane production occurred markedly accompanied by consumption of the accumulated acetate from the third day after the addition of molybdate. The maximum rate of methane production was 1.2–1.9 μmol ml −1 day −1 , which was similar to those in highly polluted freshwater sediments such as the Tama River, Tokyo, Japan. These results show that acetate is a common major substrate for sulfate reduction and methane production, and SRB competitively inhibit potential acetoclastic methanogenesis in coastal sediments. Methanogens may potentially inhabit the sediments at low levels of population density and activity." @default.
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- W2045621444 date "1997-08-01" @default.
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- W2045621444 title "Major substrates for microbial sulfate reduction in the sediments of Ise Bay, Japan" @default.
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- W2045621444 doi "https://doi.org/10.1007/bf02523785" @default.
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