Articles | Volume 18, issue 24
Biogeosciences, 18, 6533–6546, 2021
https://doi.org/10.5194/bg-18-6533-2021
Biogeosciences, 18, 6533–6546, 2021
https://doi.org/10.5194/bg-18-6533-2021

Research article 21 Dec 2021

Research article | 21 Dec 2021

Fractionation of stable carbon isotopes during acetate consumption by methanogenic and sulfidogenic microbial communities in rice paddy soils and lake sediments

Ralf Conrad et al.

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Cited articles

Angel, R., Claus, P., and Conrad, R.: Methanogenic archaea are globally ubiquitous in aerated soils and become active under wet anoxic conditions, ISME J., 6, 847–862, 2012. 
Berger, S. A., Krompass, D., and Stamatakis, A.: Performance, accuracy, and web server for evolutionary placement of short sequence reads under maximum likelihood, Syst. Biol., 60, 291–302, 2011.] 
Blair, N. E. and Carter Jr., W. D.: The carbon isotope biogeochemistry of acetate from a methanogenic marine sediment, Geochim. Cosmochim. Ac., 56, 1247–1258, 1992. 
Blaser, M. and Conrad, R.: Stable carbon isotope fractionation as tracer of carbon cycling in anoxic soil ecosystems, Curr. Opin. Biotech., 41, 122–129, 2016. 
Blaser, M. B., Dreisbach, L. K., and Conrad, R.: Carbon isotope fractionation of Thermoanaerobacter kivui in different growth media and at different total inorganic carbon concentrations, Org. Geochem., 81, 45–52, 2015. 
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Short summary
Acetate is an important intermediate during the anaerobic degradation of organic matter. It is consumed by methanogenic and sulfidogenic microorganisms accompanied by stable carbon isotope fractionation. We determined isotope fractionation under different conditions in two paddy soils and two lake sediments and also determined the composition of the microbial communities. Despite a relatively wide range of experimental conditions, the range of fractionation factors was quite moderate.
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