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dc.contributor.authorFinne, Eirik Aasmo
dc.contributor.authorBjerke, Jarle W.
dc.contributor.authorErlandsson, Rasmus
dc.contributor.authorTømmervik, Hans
dc.contributor.authorStordal, Frode
dc.contributor.authorTallaksen, Lena M.
dc.date.accessioned2023-07-06T11:20:16Z
dc.date.available2023-07-06T11:20:16Z
dc.date.created2023-07-05T12:24:56Z
dc.date.issued2023
dc.identifier.issn1748-9326
dc.identifier.urihttps://hdl.handle.net/11250/3076567
dc.description.abstractVegetation has a profound impact on climate through complex interactions and feedback loops, where especially regulation of albedo, the ratio of reflected to incoming solar radiation, is important at high latitudes. How vegetation albedo varies along environmental gradients in tundra ecosystems is still not well understood, particularly for ecosystems dominated by nonvascular vegetation. We studied broadband shortwave albedo of open boreal, arctic, and alpine ecosystems over a 2000 km long latitudinal gradient (60◦ N–79◦ N) and contrasted this against species composition, vegetation greenness (normalised difference vegetation index—NDVI), momentary ecosystem CO2 fluxes and reindeer (Rangifer tarandus) grazing pressure. High cover of pale terricolous fruticose lichens was the single most important predictor for vegetation albedo, which had a maximum value of 0.389 under clear sky conditions and solar zenith angle 60◦. To our knowledge, this is the highest broadband albedo recorded for a vegetated surface. NDVI was negatively correlated to lichen biomass (rs = −0.56), and albedo (rs = −0.19). Gross primary production and ecosystem respiration varied considerably less between plots and vegetation types than albedo. While it is well-known that Rangifer affects climate-relevant aboveground biomass, we here show that its regulation of surface albedo in northern ecosystems may also be of high importance for land-atmosphere interactions. The data presented here thus advocate for an increased understanding of the important and complex role of herbivores and lichen cover in climate-vegetation interactions.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectalbedoen_US
dc.subjectRangifer tarandusen_US
dc.subjecttundraen_US
dc.subjectherbivoreen_US
dc.subjectclimateen_US
dc.subjectvegetation interactionsen_US
dc.titleVariation in albedo and other vegetation characteristics in non-forested northern ecosystems: the role of lichens and mossesen_US
dc.title.alternativeVariation in albedo and other vegetation characteristics in non-forested northern ecosystems: the role of lichens and mossesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2023 The Authorsen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.volume18en_US
dc.source.journalEnvironmental Research Lettersen_US
dc.identifier.doi10.1088/1748-9326/ace06d
dc.identifier.cristin2160956
dc.relation.projectNorges forskningsråd: 369910en_US
dc.relation.projectNorges forskningsråd: 287402en_US
dc.relation.projectNorges forskningsråd: 369924en_US
dc.relation.projectNorges forskningsråd: 310734)en_US
dc.relation.projectNorges forskningsråd: 294948en_US
dc.source.articlenumber074038en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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