Acetoclastic and hydrogenotrophic methane production and methanogenic populations in an acidic West-Siberian peat bog.

@article{Kotsyurbenko2004AcetoclasticAH,
  title={Acetoclastic and hydrogenotrophic methane production and methanogenic populations in an acidic West-Siberian peat bog.},
  author={Oleg Kotsyurbenko and K J Chin and Mikhail Vladimirovich Glagolev and Stephan Stubner and Maria V Simankova and A. N. Nozhevnikova and Ralf Conrad},
  journal={Environmental microbiology},
  year={2004},
  volume={6 11},
  pages={
          1159-73
        }
}
Sites in the West Siberian peat bog 'Bakchar' were acidic (pH 4.2-4.8), low in nutrients, and emitted CH4 at rates of 0.2-1.5 mmol m(-2) h(-1). The vertical profile of delta13CH4 and delta13CO2 dissolved in the porewater indicated increasing isotope fractionation and thus increasing contribution of H2/CO2-dependent methanogenesis with depth. The anaerobic microbial community at 30-50 cm below the water table produced CH4 with optimum activity at 20-25 degrees C and pH 5.0-5.5 respectively… 

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References

SHOWING 1-10 OF 73 REFERENCES

Hydrogenotrophic Methanogenesis by Moderately Acid-Tolerant Methanogens of a Methane-Emitting Acidic Peat

In this acidic bog peat, H2 is an important substrate for acid-tolerant methanogens, interspecies hydrogen transfer is involved in the degradation of organic carbon, the accumulation of protonated volatile fatty acids inhibits methanogenesis, and meetinghanogenesis might be due to the activities of methanogenic that are phylogenetic members of the Methanobacteriaceae, Methanomicrobiales, and Methanosarcinaceae.

Evidence for anaerobic syntrophic acetate oxidation during methane production in the profundal sediment of subtropical Lake Kinneret (Israel).

Methane production in samples of the profundal sediment from Lake Kinneret showed Methanomicrobiaceae as the dominant methanogenic group, whereas acetoclastic methanogens could not be detected, indicating that CH(4) was produced exclusively from acetate.

Methanogenic Pathway and Archaeal Community Structure in the Sediment of Eutrophic Lake Dagow: Effect of Temperature

The function and structure of a methanogenic community in anoxic sediment of Lake Dagow, a eutrophic lake in north-eastern Germany, were studied, showing a higher contribution of H2-dependent methanogenesis and a lower contribution of acetate-dependent meethanogenesis at high versus low temperature.

Methane production in eutrophicLake Plußsee: seasonal change, temperature effect and metabolicprocesses in the profundal sediment

The stable carbon isotopic composition of CH 4 and CO 2 in the water column and in incubated sediment slurries indicated that CH 4 production was dominated by acetoclastic methanogenesis, with H 2 /CO 2 -dependent meethanogenesis contributing more at 25 °C than 4 °C.

Influence of pH on Terminal Carbon Metabolism in Anoxic Sediments from a Mildly Acidic Lake

Analysis of both carbon transformation parameters with C-labeled tracers and bacterial trophic group enumerations indicated that methanogenesis from acetate and both heterolactic- and acetic acid-producing fermentations were important to the anaerobic digestion process.

Anaerobic microbial biogeochemistry in a northern bog: Acetate as a dominant metabolic end product

CO2 production was the most rapid process measured in laboratory incubations and appeared to be due primarily to fermentation, and acetate was ultimately oxidized to CO2 via aerobic respiration and to a much lesser extent anaerobically by Fe reduction.

Ecophysiological adaptations of anaerobic bacteria to low pH: analysis of anaerobic digestion in acidic bog sediments

Evidence is provided that the pH present in the bog sediments alter anaerobic digestion processes so that total biocatalytic activity is lower but the general carbon and electron flow pathways are similar to those of neutral anoxic sediments.

Methane Production in Minnesota Peatlands

The accumulation of metabolic end products produced within peat bogs appears to be an important mechanism limiting carbon turnover in peatland environments.

Intermediary metabolism in methanogenic paddy soil and the influence of temperature

Comparison of the relative amounts of accumulated intermediates indicates that the H2-producing reactions were more sensitive to low temperature than the H1-consuming reactions, and that H2 consumption by methanogenesis was more sensitive than H1 consumption by homoacetogenesis.

Temporal change of gas metabolism by hydrogen-syntrophic methanogenic bacterial associations in anoxic paddy soil

Interspecies H2 transfer within methanogenic bacterial associations (MBA) accounted for 95–97% of the conversion of 14CO2 to 14CH4 in anoxic paddy soil. Only 3–5% of the 14CH4 were produced from the
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