Bacterial Processes of the Methane Cycle in Bottom Sediments of Lake Baikal

被引：0
作者：
O. P. Dagurova
B. B. Namsaraev
L. P. Kozyreva
T. I. Zemskaya
L. E. Dulov
机构：
[1] Institute of General and Experimental Biology,Siberian Division, Russian Academy of Sciences
[2] Russian Academy of Sciences,Limnological Institute, Siberian Division
[3] Institute of Microbiology,undefined
[4] Russian Academy of Sciences,undefined
来源：
Microbiology | 2004年 / 73卷
关键词：
methane production; methane oxidation; methane emission; Lake Baikal;
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摘要：
The activity of methanogenic and methanotrophic bacteria was evaluated in bottom sediments of Lake Baikal. Methane concentration in Baikal bottom sediments varied from 0.0053 to 81.7 ml/dm3. Bacterial methane was produced at rates of 0.0004–534.7 μl CH4/(dm3 day) and oxidized at rates of 0.005–1180 μl CH4/(dm3 day). Peak methane production and oxidation were observed in Frolikha Bay near a methane vent. Methane was emitted into water at rates of 49.2–4340 μl CH4/(m2 day). Rates of bacterial methane oxidation in near-bottom water layers ranged from 0.002 to 1.78 μl/(l day). Methanogens and methanotrophs were found to play an important role in the carbon cycle through all layers of sediments, particularly in the areas of methane vent and gas-hydrate occurrence.
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页码：202 / 210
页数：8
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