Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/29415
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dc.contributor.authorStewart, Katherine Jen
dc.contributor.authorBrummell, Martin Een
dc.contributor.authorFarrell, Richard Een
dc.contributor.authorSiciliano, Steven Den
dc.date.accessioned2020-09-10T23:59:54Z-
dc.date.available2020-09-10T23:59:54Z-
dc.date.issued2012-05-
dc.identifier.citationSoil Biology & Biochemistry, v.48, p. 69-77en
dc.identifier.issn1879-3428en
dc.identifier.issn0038-0717en
dc.identifier.urihttps://hdl.handle.net/1959.11/29415-
dc.descriptionSupplementary material associated with this article can befound, in the online version, at doi:10.1016/j.soilbio.2012.01.016en
dc.description.abstractProduction and consumption of greenhouse gases such as CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub>O are key factors driving climate change. While CO<sub>2</sub> sinks are commonly reported and the mechanisms relatively well understood, N<sub>2</sub>O sinks have often been overlooked and the driving factors for these sinks are poorly understood. We examined CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub>O flux in three High Arctic polar deserts under both light (measured in transparent chambers) and dark (measured in opaque chambers) conditions. We further examined if differences in soil moisture, evapotranspiration, Photosynthetically Active Radiation (PAR), and/or plant communities were driving gas fluxes measured in transparent and opaque chambers at each of our sites. Nitrous oxide sinks were found at all of our sites suggesting that N<sub>2</sub>O uptake can occur under extreme polar desert conditions, with relatively low soil moisture, soil temperature and limited soil N. Fluxes of CO<sub>2</sub> and N<sub>2</sub>O switched from sources under dark conditions to sinks under light conditions, while CH<sub>4</sub> fluxes at our sites were not affected by light conditions. Neither evapotranspiration nor PAR were significantly correlated with CO<sub>2</sub> or N<sub>2</sub>O flux, however, soil moisture was significantly correlated with both gas fluxes. The relationship between soil moisture and N<sub>2</sub>O flux was different under light and dark conditions, suggesting that there are other factors, in addition to moisture, driving N<sub>2</sub>O sinks. We found significant differences in N<sub>2</sub>O and CO<sub>2</sub> flux between plant communities under both light and dark conditions and observed individual communities that shifted between sources and sinks depending on light conditions. Failure of many studies to include plant-mediated N<sub>2</sub>O flux, as well as, N<sub>2</sub>O soil sinks may account for the currently unbalanced global N<sub>2</sub>O budget.en
dc.languageenen
dc.publisherElsevier Ltden
dc.relation.ispartofSoil Biology & Biochemistryen
dc.titleN2O flux from plant-soil systems in polar deserts switch between sources and sinks under different light conditionsen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.soilbio.2012.01.016en
local.contributor.firstnameKatherine Jen
local.contributor.firstnameMartin Een
local.contributor.firstnameRichard Een
local.contributor.firstnameSteven Den
local.subject.for2008050303 Soil Biologyen
local.subject.for2008060208 Terrestrial Ecologyen
local.subject.seo2008961499 Soils not elsewhere classifieden
local.subject.seo2008960305 Ecosystem Adaptation to Climate Changeen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailmbrummel@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.publisher.placeUnited Kingdomen
local.format.startpage69en
local.format.endpage77en
local.identifier.scopusid84858064599en
local.peerreviewedYesen
local.identifier.volume48en
local.contributor.lastnameStewarten
local.contributor.lastnameBrummellen
local.contributor.lastnameFarrellen
local.contributor.lastnameSicilianoen
dc.identifier.staffune-id:mbrummelen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:1959.11/29415en
local.date.onlineversion2012-02-04-
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleN2O flux from plant-soil systems in polar deserts switch between sources and sinks under different light conditionsen
local.relation.fundingsourcenoteNSERC Discovery; NSERC Northern Supplement; IPY CiCATen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorStewart, Katherine Jen
local.search.authorBrummell, Martin Een
local.search.authorFarrell, Richard Een
local.search.authorSiciliano, Steven Den
local.uneassociationNoen
local.atsiresearchNoen
local.sensitive.culturalNoen
local.identifier.wosid000302449200009en
local.year.available2012-
local.year.published2012-
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/08e8ee34-a2b0-4256-b9d9-ff2b3d2c7c8fen
local.subject.for2020410603 Soil biologyen
local.subject.for2020310308 Terrestrial ecologyen
local.subject.seo2020190102 Ecosystem adaptation to climate changeen
Appears in Collections:Journal Article
School of Environmental and Rural Science
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