Activity and diversity of methane-oxidizing bacteria along a Norwegian sub-Arctic glacier forefield

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DOI

    Alejandro Mateos-Rivera, Faculty of Engineering and Science, Western Norway University of Applied Sciences, NO-6851, Sogndal, Norway., Lise Øvreås, Arctic Geology Department, The University Centre in Svalbard, UNIS, P.O. Box 156, 9171, Longyearbyen, Norway., Bryan Wilson, Department of Biology and Hjort Centre for Marine Ecosystem Dynamics , University of Bergen , 5020 Bergen , Norway., Jacob C Yde, Faculty of Engineering and Science, Western Norway University of Applied Sciences, NO-6851, Sogndal, Norway.,
  • Kai W Finster

Methane (CH4) is one of the most abundant greenhouse gases in the atmosphere and identification of its sources and sinks is crucial for the reliability of climate model outputs. Although CH4 production and consumption rates have been reported from a broad spectrum of environments, data obtained from glacier forefields are restricted to a few locations. We report the activities of methanotrophic communities and their diversity along a chronosequence in front of a sub-Arctic glacier using high-throughput sequencing and gas flux measurements. CH4 oxidation rates were measured in the field throughout the growing season during three sampling times at eight different sampling points in combination with laboratory incubation experiments. The overall results showed that the methanotrophic community had similar trends of increased CH4 consumption and increased abundance as a function of soil development and time of year. Sequencing results revealed that the methanotrophic community was dominated by a few OTUs and that a short-term increase in CH4 concentration, as performed in the field measurements, altered slightly the relative abundance of the OTUs.

Original languageEnglish
JournalF E M S Microbiology Ecology
Volume94
Issue number5
Pages (from-to)1-11
ISSN0168-6496
DOIs
StatePublished - Mar 2018

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