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dc.contributor.authorCooper, Elisabeth J.
dc.contributor.authorLittle, Chelsea J.
dc.contributor.authorPilsbacher, Anna Katharina
dc.contributor.authorMörsdorf, Martin Alfons
dc.date.accessioned2020-03-10T12:13:54Z
dc.date.available2020-03-10T12:13:54Z
dc.date.issued2019-07-25
dc.description.abstract<i>Question</i> - How does increased snow depth affect plant community composition of High Arctic tundra, and can the Normalized Differential Vegetation Index (NDVI) detect induced changes?<p><p> <i>Location</i> - Adventdalen, Spitsbergen, Svalbard (78°10′ N, 16°04′ E).<p><p> <i>Methods</i> - We manipulated snow depth on the tundra using fences, resulting in <i>Deep, Medium</i>, and <i>Ambient</i> snow regimes. Increased snow led to warmer winter soil temperatures, a delayed onset of growing season and wetter conditions during the early growing season. Plant community composition of living and dead plant material was recorded after nine years. NDVI was measured at the plot level using a handheld sensor.<p><p> <i>Results</i> - Community composition and the abundance of typically dominant shrub species were substantially different in the <i>Deep</i> compared to the <i>Ambient</i> regime. <i>Deep</i> had lower cover of live shrubs (<i>Cassiope tetragona, Dryas octopetala</i> and <i>Salix polaris</i>) and <i>Luzula confusa</i>, and higher cover of dead shrubs (<i>Cassiope</i> and <i>Dryas</i>) compared to the other snow regimes. Bryophyte cover was highest in <i>Medium</i>. NDVI was positively correlated to the cover of living vascular plants and negatively correlated to cover of dead vascular plants. Accordingly, <i>Deep</i> snow regime had reduced NDVI, reflecting the contribution of dead <i>Cassiope</i> and <i>Dryas</i>.<p><p> <i>Conclusion</i> - Snow regime strongly influenced community composition in High Arctic plant communities. Enhanced snow regimes had more dead shrubs, reduced <i>Luzula</i> and increased bryophyte cover than ambient conditions. These differences were detectable by handheld NDVI sensors.en_US
dc.identifier.citationCooper E.J., Little CJ, Pilsbacher AK, Mörsdorf MA. Disappearing green: Shrubs decline and bryophytes increase with nine years of increased snow accumulation in the High Arctic. Journal of Vegetation Science. 2019;30(5):857-867en_US
dc.identifier.cristinIDFRIDAID 1747471
dc.identifier.doi10.1111/jvs.12793
dc.identifier.issn1100-9233
dc.identifier.issn1654-1103
dc.identifier.urihttps://hdl.handle.net/10037/17703
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Vegetation Science
dc.relation.projectIDNorges forskningsråd: 230970en_US
dc.relation.projectIDFramsenteret: SnoEcoFenen_US
dc.relation.projectIDFramsenteret: SNOECOFENen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRIMEDBIO/230970/Norway/The effect of snow depth and snow melt timing on arctic terrestrial ecosystems//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleDisappearing green: Shrubs decline and bryophytes increase with nine years of increased snow accumulation in the High Arcticen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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