World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Stable Carbon Isotope Fractionation During Methanogenesis in Three Boreal Peatland Ecosystems : Volume 7, Issue 4 (16/07/2010)

By Galand, P. E.

Click here to view

Book Id: WPLBN0004005552
Format Type: PDF Article :
File Size: Pages 19
Reproduction Date: 2015

Title: Stable Carbon Isotope Fractionation During Methanogenesis in Three Boreal Peatland Ecosystems : Volume 7, Issue 4 (16/07/2010)  
Author: Galand, P. E.
Volume: Vol. 7, Issue 4
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Conrad, R., Yrjälä, K., & Galand, P. E. (2010). Stable Carbon Isotope Fractionation During Methanogenesis in Three Boreal Peatland Ecosystems : Volume 7, Issue 4 (16/07/2010). Retrieved from

Description: UPMC Univ Paris 06, Observatoire Océanologique, 66651 Banyuls-sur-Mer, France. The degradation of organic matter to CH4 and CO2 was investigated in three different boreal peatland systems in Finland, a mesotrophic fen (MES), an oligotrophic fen (OLI), and an ombrotrophic peat (OMB). MES had similar production rates of CO2 and CH4, but the two nutrient-poor peatlands (OLI and OMB) produced in general more CO2 than CH4. Δ13C analysis of CH4 and CO2 in the presence and absence methyl fluoride (CH3F), an inhibitor of acetoclastic methanogenesis, showed that CH4 was predominantly produced by hydrogenotrophic methanogenesis and that acetoclastic methanogenesis only played an important role in MES. These results, together with our observations concerning the collective inhibition of CH4 and CO2 production rates by CH3F, indicate that organic matter was degraded through different paths in the mesotrophic and the nutrient-poor peatlands. In the mesotrophic fen, the major process is canonical fermentation followed by acetoclastic and hydrogenotrophic methanogenesis, while in the nutrient-poor peat, organic matter was apparently degraded to a large extent by a different path which finally involved hydrogenotrophic methanogenesis. Our data suggest that degradation of organic substances in the oligotrophic environments was incomplete and involved the use of organic compounds as oxidants.

Stable carbon isotope fractionation during methanogenesis in three boreal peatland ecosystems

Bartlett, K. B. and Harriss, R. C.: Review and assessment of methane emissions from wetlands, Chemosphere, 26, 261–320, 1993.; Avery, G. B., Shannon, R. D., White, J. R., Martens, C. S., and Alperin, M. J.: Effect of seasonal changes in the pathways of methanogenesis on the δ13C values of pore water methane in a Michigan peatland, Global Biogeochem. Cy., 13, 475–484, 1999.; Chanton, J. P., Glaser, P. H., Chasar, L. S., et al.: Radiocarbon evidence for the importance of surface vegetation on fermentation and methanogenesis in contrasting types of boreal peatlands, Global Biogeochem. Cy., 22, GB4022, doi:10.1029/2008GB003274, 2008.; Chasar, L. S., Chanton, J. P., Glaser, P. H., Siegel, D. I., and Rivers, J. S.: Radiocarbon and stable carbon isotopic evidence for transport and transformation of dissolved organic carbon, dissolved inorganic carbon, and CH4 in a northern Minnesota peatland, Global Biogeochem. Cy., 14, 1095–1108, 2000.; Chin, K. J. and Conrad, R.: Intermediary metabolism in methanogenic paddy soil and the influence of temperature, FEMS Microbiol. Ecol., 18, 85–102, 1995.; Conrad, R.: Contribution of hydrogen to methane production and control of hydrogen concentrations in methanogenic soils and sediments [review], FEMS Microbiol. Ecol., 28, 193–202, 1999.; Conrad, R.: Quantification of methanogenic pathways using stable carbon isotopic signatures: a review and a proposal, Org. Geochem., 36, 739–752, 2005.; Conrad, R. and Klose, M.: How specific is the inhibition by methyl fluoride of acetoclastic methanogenesis in anoxic rice field soil?, FEMS Microbiol. Ecol., 30, 47–56, 1999.; Conrad, R., Chan, O. C., Claus, P., and Casper, P.: Characterization of methanogenic Archaea and stable isotope fractionation during methane production in the profundal sediment of an oligotrophic lake (Lake Stechlin, Germany), Limnol. Oceanogr., 52, 1393–1406, 2007.; Lovley, D. R., Klug, M. J.: Intermediary metabolism of organic matter in the sediments of a eutrophic lake, Appl. Environ. Microbiol., 43, 552–560, 1982.; Conrad, R., Claus, P., and Casper, P.: Characterization of stable isotope fractionation during methane production in the sediment of a eutrophic lake, Lake Dagow, Germany, Limnol. Oceanogr., 54, 457–471, 2009a.; Conrad, R., Klose, M., Claus, P., and Dan, J.: Activity and composition of the methanogenic archaeal community in soil vegetated with wild rice versus cultivated rice, Soil Biol. Biochem. 41, 1390–1395, 2009b.; Conrad, R., Claus, P., and Casper, P.: Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment of an acidic bog lake, Lake Grosse Fuchskuhle, Limnol. Oceanogr., doi:10.4319/lo.2010.55.5.0000, in press, 2010a.; Conrad, R., Klose, M., Claus, P., and Enrich-Prast, A.: Methanogenic pathway, 13C isotope fractionation, and archaeal community composition in the sediment of two clearwater lakes of Amazonia, Limnol. Oceanogr., 55, 689–702, 2010b.; Duddleston, K. N., Kinney, M. A., Kiene, R. P., and Hinesm, M. E.: Anaerobic microbial biogeochemistry in a northern bog: Acetate as a dominant metabolic end product, Global Biogeochem. Cy., 16, 1063, doi:10.1029/2001GB00140, 2002.; Galand, P. E., Fritze, H., Conrad, R., and Yrjälä, K.: Pathways for methanogenesis and diversity of methanogenic archaea in three boreal peatland ecosystems, Appl. Environ. Microbiol., 71, 2195–2198, 2005.; Galand, P. E., Saarnio, S., Fritze, H., and Yrjälä, K.: Depth related diversity of methanogen Archaea in Finnish oligotrophic fen, FEMS Microbiol. Ecol., 42, 441–449, 2002.; Goevert, D. and Conrad, R.: Effect of substrate concentration on carbon isotope fractionation during acetoclastic methanogenesis by Methanosarcina barkeri and M. acetivorans and in rice field soil, Appl. Environ. Microbiol., 75, 2605–2612, 2009.; Gorham, E.: Northern peatlands – Role in the


Click To View

Additional Books

  • Unravelling the Enigmatic Origin of Calc... (by )
  • Synthesizing Greenhouse Gas Fluxes Acros... (by )
  • The Greenhouse Gas Balance of European G... (by )
  • Reconsidering the Role of Carbonate Ion ... (by )
  • Controlled Experimental Aquarium System ... (by )
  • Australian Net (1950S–1990) Soil Organic... (by )
  • Stable Isotope Study of a New Chondricht... (by )
  • Net Primary Productivity, Allocation Pat... (by )
  • Effects of Nitrogen Fertilization on the... (by )
  • Carbon Exchange Between the Atmosphere a... (by )
  • A Laboratory Experiment of Intact Polar ... (by )
  • The Root Economics Spectrum: Divergence ... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.