SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Wesley E)
 

Sökning: WFRF:(Wesley E) > A complete Holocene...

A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard

Voldstad, Linn H. (författare)
The University Centre in Svalbard (UNIS), Longyearbyen, Norway; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
Alsos, Inger G. (författare)
The Arctic University Museum of Norway, UiT The Arctic University of Norway, Tromsø, Norway
Farnsworth, Wesley R. (författare)
The University Centre in Svalbard (UNIS), Longyearbyen, Norway; Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway; NordVulk, Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Askja, Reykjavik, Iceland
visa fler...
Heintzman, Peter D. (författare)
The Arctic University Museum of Norway, UiT The Arctic University of Norway, Tromsø, Norway
Håkansson, Lena (författare)
The University Centre in Svalbard (UNIS), Longyearbyen, Norway
Kjellman, Sofia E. (författare)
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
Rouillard, Alexandra (författare)
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway; Centre for GeoGenetics, University of Copenhagen, Copenhagen K., Denmark
Schomacker, Anders (författare)
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
Eidesen, Pernille B. (författare)
The University Centre in Svalbard (UNIS), Longyearbyen, Norway
visa färre...
 (creator_code:org_t)
Elsevier, 2020
2020
Engelska.
Ingår i: Quaternary Science Reviews. - : Elsevier. - 0277-3791 .- 1873-457X. ; 234
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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. 

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

Nyckelord

Ancient DNA
SedaDNA
Holocene
Lake sediments
Metabarcoding
Svalbard
Vegetation dynamics
Biodiversity hotspot

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy