dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Voldstad, Linn H. |
dc.contributor.author |
Alsos, Inger G. |
dc.contributor.author |
Farnsworth, Wesley |
dc.contributor.author |
Heintzman, Peter D. |
dc.contributor.author |
Håkansson, Lena |
dc.contributor.author |
Kjellman, Sofia E. |
dc.contributor.author |
Rouillard, Alexandra |
dc.contributor.author |
Schomacker, Anders |
dc.contributor.author |
Eidesen, Pernille B. |
dc.date.accessioned |
2021-01-15T10:49:35Z |
dc.date.available |
2021-01-15T10:49:35Z |
dc.date.issued |
2020-04-15 |
dc.identifier.citation |
Voldstad, L.H., Alsos, I.G., Farnsworth, W.R., Heintzman, P.D., Håkansson, L., Kjellman, S.E., Rouillard, A., Schomacker, A., Eidesen, P.B., 2020. A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard. Quaternary Science Reviews 234, 106207. doi:10.1016/j.quascirev.2020.106207 |
dc.identifier.issn |
0277-3791 |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/2375 |
dc.description |
Publisher's version (útgefin grein) |
dc.description.abstract |
Arctic hotspots, local areas of high biodiversity, are potential key sites for conservation of Arctic biodiversity. However, there is a need for improved understanding of their long-term resilience. The Arctic hotspot of Ringhorndalen has the highest registered diversity of vascular plants in the Svalbard archipelago, including several remarkable and isolated plant populations located far north of their normal distribution range. Here we analyze a lake sediment core from Ringhorndalen for sedimentary ancient DNA (sedaDNA) and geochemical proxies to detect changes in local vegetation and climate. Half of the plant taxa appeared already before 10,600 cal. yr BP, indicating rapid colonization as the ice retreated. Thermophilous species had a reoccurring presence throughout the Holocene record, but stronger signal in the early than Late Holocene period. Thus, thermophilous Arctic plant species had broader distribution ranges during the Early Holocene thermal maximum c. 10,000 cal. yr BP than today. Most of these thermophilous species are currently not recorded in the catchment area of the studied lake, but occur locally in favourable areas further into the valley. For example, Empetrum nigrum was found in >40% of the sedaDNA samples, whereas its current distribution in Ringhorndalen is highly restricted and outside the catchment area of the lake. Our findings support the hypothesis of isolated relict populations in Ringhorndalen. The findings are also consistent with main Holocene climatic shifts in Svalbard identified by previous studies and indicate an early warm and species-rich postglacial period until c. 6500 cal. yr BP, followed by fluctuating cool and warm periods throughout the later Holocene. |
dc.description.sponsorship |
The core-samplingfield campaign, subsequent sub-sampling ofsediments and macrofossils, ITRAX-scans, and radiocarbon datingwere funded by the Svalbard Environmental Protection Fund(project 16/35 to WRF). Financial support for molecular analysisandfield work was provided by the Svalbard Environmental Pro-tection Fund (project 14/118 to PBE) and Jan Christensen’sendowment (to LHV). IGA and PDH acknowledge support from theResearch Council of Norway (Grant 250963:“ECOGEN”). We thankJohannes Sand Bolstad forfield assistance, Kari Klanderud forproject administration, the wider ECOGEN research group inTromsø, including Dilli Rijal for pooling and cleaning of the PCRproducts and Youri Lammers for helping with bioinformatic ana-lyses and reference libraries. Bioinformatic analyses were per-formed on the Abel Cluster, owned by the University of Oslo andUninett/Sigma2, and operated by the Department for ResearchComputing at USIT, the University of Oslo IT-department.http://www.hpc.uio.no/. We thank Marie-Louise Siggaard-Andersen forassistance with the ITRAX-scanning of the sediment core as well asDr. Skafti Brynj olfsson and Dr. Marc Macias-Fauria for collaborationin the field. |
dc.format.extent |
106207 |
dc.language.iso |
en |
dc.publisher |
Elsevier BV |
dc.relation.ispartofseries |
Quaternary Science Reviews;234 |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Ancient DNA |
dc.subject |
Biodiversity hotspot |
dc.subject |
Holocene |
dc.subject |
Lake sediments |
dc.subject |
Metabarcoding |
dc.subject |
SedaDNA |
dc.subject |
Svalbard |
dc.subject |
Vegetation dynamics |
dc.subject |
Nýlífsöld |
dc.subject |
Jarðlög |
dc.subject |
Eldvirkni |
dc.title |
A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard |
dc.type |
info:eu-repo/semantics/article |
dcterms.license |
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
Quaternary Science Reviews |
dc.identifier.doi |
10.1016/j.quascirev.2020.106207 |
dc.relation.url |
https://www.sciencedirect.com/science/article/pii/S0277379119311278?via%3Dihub |
dc.contributor.department |
Jarðvísindastofnun (HÍ) |
dc.contributor.department |
Institute of Earth Sciences (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |