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Abstract - Issue Mar 2015, 36 (2) Back
nstantaneous and historical temperature effects on a-pinene
survival of methanogens of an anaerobic digestion sludge under starvation and
Tae Gwan Kim,
Taewoo Yi, Jung-Hee Lee and Kyung-Suk Cho*
Global Top 5
Research Programme, Department of Environmental Science and Engineering, Ewha
Daehyun-dong, Seodaemun-gu, Seoul 120-750, Korea
Authors Email : firstname.lastname@example.org
13 September 2013
02 May 2014
20 June 2014
investigate starvation effect on methanogen community, two identical membrane
reactors were continuously operated for 84 consecutive days, with a
temperature change from 50ºC to 20ºC. Continuous
feeding washed out 97% biomass from reactors during the experimental period.
Quantitative PCR, using mcrA genes, indicated that the methanogen abundance
decreased from 7.0×107 to 1.2×107 mcrA copies·ml-1
(volume basis) at 50 °C, and then increased to 4.4 ×107 mcrA
copies·ml-1 at 20 °C (p<0.05). Correspondence analysis
indicated that methanogen communities were distinctly grouped by each
temperature. Canonical correspondence analysis indicated that temperature
showed a significant correlation with the methanogen community composition.
These results suggest that methanogens can survive for a long time (at least
more than 84 days) under starvation conditions, and that temperature could be
a primary factor determining the density and community of methanogens.
Population dynamics, Starvation, Temperature
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