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dc.contributor.authorAlsos, Inger Greve
dc.contributor.authorSjögren, Per
dc.contributor.authorBrown, Antony G.
dc.contributor.authorGielly, Ludovic
dc.contributor.authorMerke, Marie Kristine Føreid
dc.contributor.authorPaus, Aage
dc.contributor.authorLammers, Youri
dc.contributor.authorEdwards, Mary E.
dc.contributor.authorAlm, Torbjørn
dc.contributor.authorLeng, Melanie
dc.contributor.authorGoslar, Tomasz
dc.contributor.authorLangdon, Catherine T.
dc.contributor.authorBakke, Jostein
dc.contributor.authorvan der Bilt, Willem G.M.
dc.date.accessioned2021-06-07T07:50:15Z
dc.date.available2021-06-07T07:50:15Z
dc.date.issued2020-06-05
dc.description.abstractAndøya on the NW coast of Norway is a key site for understanding the Last Glacial Maximum (LGM) in northern Europe. Controversy has arisen concerning the local conditions, especially about the timing and extent of local glacial cover, maximum July temperatures and whether pine and/or spruce could have grown there. We reviewed all existing data and add newly analysed ancient sedimentary DNA (<i>seda</i>DNA), pollen, macrofossils, geochemistry and stable isotopes from three lake sediment cores from Øvre Æråsvatnet. A total of 23 new dates and age-depth modelling suggests the lake has been ice-free since GI2 (<23.4 cal ka BP) and possibly GS3 (<26.7 cal ka BP). <i>Pinus</i> and <i>Picea seda</i>DNA was found in all three cores but at such low frequencies that it could not be distinguished from background contamination. LGM samples have an exceptionally high organic matter content, with isotopic values indicating that carbon and nitrogen derive from a marine source. Along with finds of bones of the little auk (<i>Alle alle</i>), this indicates that the lake received guano from an adjacent bird colony. <i>Seda</i>DNA, pollen and macrofossil assemblages were dominated by Poaceae, Brassicaceae and Papaver, but scattered occurrence of species currently restricted to the Low Arctic Tundra Zone (July temperature of 8–9 °C) such as Apiaceae (<i>seda</i>DNA, 8–9 °C), and <i>Alchemilla alpina</i> (macrofossil, 8–9 °C) were also recorded. The review of >14.7 cal ka BP data recorded 94 vascular plant taxa, of which 38% have a northern limit in Shrub Tundra or more southern vegetation zones. This unusual assemblage likely stems from a combination of proximity to ice-free water in summer, geographical isolation linked with stochastic long-distance dispersal events, and the presence of bird-fertilized habitats. The environmental reconstruction based on all records from the area does not preclude local growth of tree species, as the local climate combined with high nutrient input may have led to periodically suitable environmental ‘hotspot’ conditions.en_US
dc.identifier.citationAlsos IGA, Sjogren P, Brown A, Gielly L, Paus A, Edwards ME, Leng, Forwick M, Føried Merkel, Langdon C, Bakke JB, Alm T, Van Der Bilt Wvd. Last Glacial Maximum environmental conditions at Andøya, northern Norway; evidence for a northern ice-edge ecological “hotspot” . Quaternary Science Reviews. 2020;239en_US
dc.identifier.cristinIDFRIDAID 1877003
dc.identifier.doi10.1016/j.quascirev.2020.106364 0277-3791
dc.identifier.issn0277-3791
dc.identifier.issn1873-457X
dc.identifier.urihttps://hdl.handle.net/10037/21365
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalQuaternary Science Reviews
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRIMEDBIO/213692/Norway/Ancient DNA of NW Europe reveals responses to climate change//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/230617/Norway/Ancient DNA of NW Europe reveals responses to climate change//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRIMEDBIO/250963/Norway/ECOGEN - Ecosystem change and species persistence over time: a genome-based approach/ECOGEN/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleLast Glacial Maximum environmental conditions at Andøya, northern Norway; evidence for a northern ice-edge ecological “hotspot”en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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