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dc.contributor.authorSubke, Jens-Arneen_UK
dc.contributor.authorHahn, Volkeren_UK
dc.contributor.authorBattipaglia, Giovannaen_UK
dc.contributor.authorLinder, Suneen_UK
dc.contributor.authorBuchmann, Ninaen_UK
dc.contributor.authorCotrufo, M Francescaen_UK
dc.description.abstractThe aim of our study was to identify interactions between the decomposition of aboveground litter and rhizosphere activity. The experimental approach combined the placement of labelled litter (δ13C=−37.9‰) with forest girdling in a 35-year-old Norway spruce stand, resulting in four different treatment combinations: GL (girdled, litter), GNL (girdled, no litter), NGL (not girdled, litter), and NGNL (not girdled, no litter). Monthly sampling of soil CO2 efflux and δ13C of soil respired CO2 between May and October 2002 allowed the partitioning of the flux into that derived from the labelled litter, and that derived from native soil organic matter and roots. The effect of forest girdling on soil CO2 efflux was detectable from June (girdling took place in April), and resulted in GNL fluxes to be about 50% of NGNL fluxes by late August. The presence of litter resulted in significantly increased fluxes for the first 2 months of the experiment, with significantly greater litter derived fluxes from non-girdled plots and a significant interaction between girdling and litter treatments over the same period. For NGL collars, the additional efflux was found to originate only in part from litter decomposition, but also from the decay of native soil organic matter. In GL collars, this priming effect was not significant, indicating an active role of the rhizosphere in soil priming. The results therefore indicate mutual positive feedbacks between litter decomposition and rhizosphere activity. Soil biological analysis (microbial and fungal biomass) of the organic layers indicated greatest activity below NGL collars, and we suppose that this increase indicates the mechanism of mutual positive feedback between rhizosphere activity and litter decomposition. However, elimination of fresh C input from both above- and belowground (GNL) also resulted in greater fungal abundance than for the NGNL treatment, indicating likely changes in fungal community structure (i.e. a shift from symbiotic to saprotrophic species abundance).en_UK
dc.publisherSpringer Verlagen_UK
dc.relationSubke J, Hahn V, Battipaglia G, Linder S, Buchmann N & Cotrufo MF (2004) Feedback interactions between needle litter decomposition and rhizosphere activity. Oecologia, 139 (4), pp. 551-559.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.subjectSoil organic matteren_UK
dc.subjectStable C isotopesen_UK
dc.subjectForest girdlingen_UK
dc.subjectSoil CO2 effluxen_UK
dc.subjectMicrobial biomassen_UK
dc.subjectSoil ecologyen_UK
dc.subjectMicrobial growthen_UK
dc.titleFeedback interactions between needle litter decomposition and rhizosphere activityen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Subke et al 2004 Oecologia.pdf] The 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.en_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationMax-Planck-Institute for Biogeochemistry, Germanyen_UK
dc.contributor.affiliationSecond University of Naplesen_UK
dc.contributor.affiliationSwedish University of Agricultural Sciencesen_UK
dc.contributor.affiliationMax-Planck-Institute for Biogeochemistry, Germanyen_UK
dc.contributor.affiliationSecond University of Naplesen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorSubke, Jens-Arne|0000-0001-9244-639Xen_UK
local.rioxx.authorHahn, Volker|en_UK
local.rioxx.authorBattipaglia, Giovanna|en_UK
local.rioxx.authorLinder, Sune|en_UK
local.rioxx.authorBuchmann, Nina|en_UK
local.rioxx.authorCotrufo, M Francesca|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameSubke et al 2004 Oecologia.pdfen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

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