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dc.contributor.authorLe Moullec, Mathilde
dc.contributor.authorBuchwal, Agata
dc.contributor.authorvan der Wal, René
dc.contributor.authorSandal, Lisa
dc.contributor.authorHansen, Brage Bremset
dc.date.accessioned2019-03-01T13:28:17Z
dc.date.available2019-03-01T13:28:17Z
dc.date.created2018-09-19T10:35:28Z
dc.date.issued2018
dc.identifier.citationJournal of Ecology. 2018, 107 (1), 436-451.nb_NO
dc.identifier.issn0022-0477
dc.identifier.urihttp://hdl.handle.net/11250/2588307
dc.description.abstract1. Long time series of primary production are rarely available, restricting our mechanistic understanding of vegetation and ecosystem dynamics under climate change. Dendrochronological tools are increasingly used instead, particularly in the Arctic—the world’s most rapidly warming biome. Yet, high‐latitude plant species are subject to strong energy allocation trade‐offs, and whether annual allocations to secondary growth (e.g. “tree‐rings”) actually reflect primary production above‐ground remains unknown. Taking advantage of a unique ground‐based monitoring time series of annual vascular plant biomass in high Arctic Svalbard (78°N), we evaluated how well retrospective ring growth of the widespread dwarf shrub Salix polaris represents above‐ground biomass production of vascular plants. 2. Using a balanced design in permanent plots for plant biomass monitoring, we collected 30 S. polaris shrubs across five sites in each of two habitats. We established annual ring growth time series using linear mixed‐effects models and related them to weather records and 13 years of above‐ground biomass production in six habitats. 3. Annual ring growth was positively correlated with above‐ground biomass production of both S. polaris (r = 0.56) and the vascular plant community as a whole (r = 0.70). As for above‐ground biomass, summer temperature was the main driver of ring growth, with this ecological signal becoming particularly clear when accounting for plant, site and habitat heterogeneity. The results suggest that ring growth measurements performed on this abundant shrub can be used to track fluctuations in past vascular plant production of high arctic tundra. 4. Synthesis. Dendrochronological tools are increasingly used on arctic shrubs to enhance our understanding of vegetation dynamics in the world’s most rapidly warming biome. Fundamental to such applications is the assumption that annual differences in ring growth reflect between‐year variation in above‐ground biomass production. We showed that ring growth indeed was a robust proxy for the annual above‐ground productivity of both the focal shrub and the vascular plant community as a whole. Despite the challenges of constructing ring growth chronologies from irregularly growing arctic shrubs, our findings confirm that shrub dendrochronology can open new opportunities for community‐dynamic studies, including in remote places where annual field sampling is difficult to achieve.nb_NO
dc.language.isoengnb_NO
dc.publisherWileynb_NO
dc.relation.urihttps://www.ntnu.edu/web/cbd/insync
dc.titleAnnual ring growth of a widespread high arctic shrub reflects past fluctuations in community‐level plant biomassnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber436-451nb_NO
dc.source.volume107nb_NO
dc.source.journalJournal of Ecologynb_NO
dc.source.issue1nb_NO
dc.identifier.doi10.1111/1365-2745.13036
dc.identifier.cristin1610905
dc.relation.projectNorges forskningsråd: 276080nb_NO
dc.relation.projectNorges forskningsråd: 223257nb_NO
dc.relation.projectNorges forskningsråd: 273451nb_NO
dc.relation.projectNorges forskningsråd: 244647nb_NO
dc.description.localcodeLocked until 02.07.2019 due to copyright restrictions. This is the peer reviewed version of an article, which has been published in final form at https://doi.org/10.1111/1365-2745.13036. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.nb_NO
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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