气候变化领域集成服务门户(CCPortal): A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard

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DOI	10.1016/j.quascirev.2020.106207
	A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard
	Voldstad L.H.; Alsos I.G.; Farnsworth W.R.; Heintzman P.D.; Håkansson L.; Kjellman S.E.; Rouillard A.; Schomacker A.; Eidesen P.B.
发表日期	2020
ISSN	0277-3791
卷号	234
英文摘要	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. © 2020 The Authors
英文关键词	Ancient DNA; Biodiversity hotspot; Holocene; Lake sediments; Metabarcoding; SedaDNA; Svalbard; Vegetation dynamics
语种	英语
scopus关键词	Biodiversity; Catchments; DNA; Lakes; Normal distribution; Runoff; Sediments; Vegetation; Ancient dnas; Holocenes; Hot spot; Lake sediments; Metabarcoding; SedaDNA; Svalbard; Vegetation dynamics; Population distribution; air-soil interaction; biodiversity; catchment; colonization; DNA; Holocene; lacustrine deposit; sediment core; vegetation dynamics; Arctic; Svalbard; Svalbard and Jan Mayen; Empetrum nigrum; Tracheophyta
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151534
作者单位	The University Centre in Svalbard (UNIS), P.O. Box 156, Longyearbyen, N-9171, Norway; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003 NMBU, Ås, N-1432, Norway; The Arctic University Museum of Norway, UiT The Arctic University of Norway, P.O. Box 6050, Langnes, Tromsø, N-9037, Norway; Department of Geosciences, UiT The Arctic University of Norway, P.O. Box 6050, Langnes, Tromsø, N-9037, Norway; NordVulk, Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Askja, Sturlugata 7, Reykjavik, IS-101, Iceland; Centre for GeoGenetics, University of Copenhagen, Øster Voldgade 5-7, Copenhagen K., DK-1350, Denmark
推荐引用方式 GB/T 7714	Voldstad L.H.,Alsos I.G.,Farnsworth W.R.,et al. A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard[J],2020,234.
APA	Voldstad L.H..,Alsos I.G..,Farnsworth W.R..,Heintzman P.D..,Håkansson L..,...&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.
MLA	Voldstad L.H.,et al."A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard".Quaternary Science Reviews 234(2020).