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dc.contributor.authorSjogersten, Sofie-
dc.contributor.authorMelander, Erik-
dc.contributor.authorWookey, Philip-
dc.description.abstractMethanotrophy (the bacterial oxidation of CH4) in soils is the major biological sink for atmospheric CH4. Here we present results from a study designed to quantify the role of the physical diffusion barrier to CH4, through surface soils, as a factor affecting methanotrophy. We used the mountain birch forest-tundra heath ecotone in subarctic northern Sweden as our study system. Our results show that, although CH4 fluxes were generally low (around -20 μmol m-2 h-1; a net flux from atmosphere to soil), the two adjacent communities responded in contrasting ways to in situ experimental reduction of the diffusion barrier (removal of the top 50 mm of soil): Uptake increased by 40% in forest soil in association with the removal, whereas it decreased marginally (by 10%) in tundra heath. Investigations of the depth-distribution of CH4 oxidation in vitro revealed maximum rates at the top of the mineral soil for the forest site, whereas at the tundra heath this was more evenly spread throughout the organic horizon. The contrasting physicochemical properties and methanotroph activity in the organic horizons together explain the contrasting responses to the removal treatment. They also illustrate the potential role of vegetation for methane oxidation around this ecotone, exerted through its influence on the depth and properties of the organic horizons in these subarctic soils. © 2007 Regents of the University of Colorado.en_UK
dc.publisherINSTAAR, University of Colorado-
dc.relationSjogersten S, Melander E & Wookey P (2007) Depth distribution of net methanotrophic activity at a mountain birch forest-tundra heath ecotone, northern Sweden, Arctic, Antarctic, and Alpine Research, 39 (3), pp. 477-480.-
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dc.titleDepth distribution of net methanotrophic activity at a mountain birch forest-tundra heath ecotone, northern Swedenen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreasonThe publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.-
dc.citation.jtitleArctic, Antarctic, and Alpine Research-
dc.type.statusPublisher version (final published refereed version)-
dc.contributor.affiliationUniversity of Nottingham-
dc.contributor.affiliationUppsala University-
dc.contributor.affiliationBiological and Environmental Sciences-
Appears in Collections:Biological and Environmental Sciences Journal Articles

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