NDLI: Major substrates for microbial sulfate reduction in the sediments of Ise Bay, Japan

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Major substrates for microbial sulfate reduction in the sediments of Ise Bay, Japan

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Ecological Research : Volume 12, Issue 1, April 1997

Major substrates for microbial sulfate reduction in the sediments of Ise Bay, Japan

Content Provider	Springer Nature Link
Author	Fukui, Manabu Suh, Jungin Yonezawa, Yoshitaka Urushigawa, Yoshikuni
Copyright Year	1997
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.
Starting Page	201
Ending Page	209
Page Count	9
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	12
Issue Number	2
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	acetate methane production sediment specific inhibitor sulfate reduction Behavioural Sciences Ecology Evolutionary Biology Forestry Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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