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Bannert, A. ; Bogen, C.* ; Esperschütz, J.* ; Koubová, A.* ; Buegger, F. ; Fischer, D. ; Radl, V. ; Fuß, R.* ; Chronakova, A.* ; Elhottova, D.* ; Simek, M.* ; Schloter, M.

Anaerobic oxidation of methane in grassland soils used for cattle husbandry.

Biogeosciences 9, 3891-3899 (2012)
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While the importance of anaerobic methane oxidation has been reported for marine ecosystems, the role of this process in soils is still questionable. Grasslands used as pastures for cattle-overwintering show an increase in anaerobic soil micro-sites caused by animal treading and excrement deposition. Therefore anaerobic potential methane oxidation activity of severely impacted soil from a cattle winter pasture was investigated in an incubation experiment under anaerobic conditions using 13C-labeled methane. We were able to detect a high microbial activity utilizing CH4 as nutrient source shown by the respiration of 13CO2. Measurements of possible terminal electron acceptors for anaerobic oxidation of methane were carried out. Soil sulfate concentrations were too low to explain the oxidation of the amount of methane added, but enough nitrate and iron(III) were detected. However, only nitrate was consumed during the experiment. 13C-PLFA analyses clearly showed the utilization of CH4 as nutrient source mainly by organisms harbouring 16:1ω7 PLFAs. These lipids were found in Gram-negative microorganisms and anaerobes. The fact that these lipids are also typical for type I methanotrophs, known as aerobic methane oxidizers, might indicate a link between aerobic and anaerobic methane oxidation.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords PHOSPHOLIPID FATTY-ACID; MICROBIAL COMMUNITIES; OVERWINTERING AREA; NITROUS-OXIDE; DENITRIFICATION; SEDIMENTS; BACTERIA; LIPOPOLYSACCHARIDES; POPULATIONS; EMISSIONS
ISSN (print) / ISBN 1726-4170
e-ISSN 1726-4189
Journal Biogeosciences
Quellenangaben Volume: 9, Issue: 10, Pages: 3891-3899 Article Number: , Supplement: ,
Publisher Copernicus
Publishing Place Göttingen
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Comparative Microbiome Analysis (COMI)
Institute of Soil Ecology (IBOE)
Institute of Biochemical Plant Pathology (BIOP)