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dc.contributor.authorWookey, Philipen_UK
dc.contributor.authorBol, Rolanden_UK
dc.contributor.authorCaseldine, Christopher Jen_UK
dc.contributor.authorHarkness, Douglas Den_UK
dc.description.abstractWe studied the late Holocene foreland and adjacent unglaciated terrain of a small cirque glacier system in north Iceland to explore the relationship between soil/ surface age, vegetation and soil evolution, and C isotope signatures of respired CO2 Field-based sampling of respired CO2 from vegetation/soil monoliths across the chronosequence was used as the basis for an analysis of the 12C:13C:14C atom ratios of CO2 using Isotope Ratio Mass Spectrometry (IRMS) and Accelerator Mass Spectrometry (AMS). Residual soil organic matter (SOM) fractions (humic and humin) were also 14C-dated from each of the surfaces, vegetation described, and soil C and N contents analyzed. Our major conclusions are (1) that ecosystem respiration in this mid-alpine environment is strongly dominated by "young" C and is not related to the 14C age of residual SOM fractions; (2) δ13C values of respired CO2, by contrast, do vary both with age of surface and with absolute respiration rate, but there is no clear indication of any effects mediated by plant species and functional type and/or the degree of reworking of SOM by decomposer organisms; and (3) the 14C dating of residual SOM fractions, together with the soil profile characteristics (including tephra deposits) and vegetation cover, both suggest some radical disturbance in soil development and SOM formation at Site 1 (the oldest surface studied here), and no clear signs of classical succession when comparing Sites 1 to 3. Finally, in the light of these observations, the familiar concept of chronosequences, and the predictable processes of ecosystem development that they often imply, are challenged in a mid-alpine tundra setting where recent climate change and anthropogenic influences (e.g., grazing pressure) are superimposed upon time as an ecological factor.en_UK
dc.publisherINSTAAR, University of Coloradoen_UK
dc.relationWookey P, Bol R, Caseldine CJ & Harkness DD (2002) Surface age, ecosystem development, and C isotope signatures of respired CO2 in an alpine environment, north Iceland. Arctic, Antarctic, and Alpine Research, 34 (1), pp. 76-87.
dc.rightsThe publisher has not responded to our queries therefore this work cannot 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.titleSurface age, ecosystem development, and C isotope signatures of respired CO2 in an alpine environment, north Icelanden_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[1552511.pdf] The publisher has not responded to our queries. This work cannot be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleArctic, Antarctic, and Alpine Researchen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationInstitute of Grassland and Environmental Researchen_UK
dc.contributor.affiliationUniversity of Exeteren_UK
dc.contributor.affiliationNERC Radiocarbon Laboratoryen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorWookey, Philip|0000-0001-5957-6424en_UK
local.rioxx.authorBol, Roland|en_UK
local.rioxx.authorCaseldine, Christopher J|en_UK
local.rioxx.authorHarkness, Douglas D|en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Biological and Environmental Sciences Journal Articles

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