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Ancient plant DNA reveals High Arctic greening during the Last Interglacial

descriptionPublicationkeyboard_double_arrow_right Article , Journal 15 Mar 2021 United States Publisher:Proceedings of the National Academy of SciencesJournal:Proceedings of the National Academy of Sciences, volume 118 (issn: 0027-8424, eissn: 1091-6490,

Copyright policy )Funded by:NSF | Collaborative Research: ..., NSF | Graduate Research Fellows..., NSF | Collaborative Research: ... +1 projects

Authors: Sarah E. Crump; Sarah E. Crump; Matthew Power; Gregory A. de Wet; Gregory A. de Wet; Sam Cutler; Julio Sepúlveda; +9 Authors

doi: 10.1073/pnas.2019069118

pmid: 33723011

pmc: PMC8020792

Ancient plant DNA reveals High Arctic greening during the Last Interglacial

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Abstract

Significance The Arctic is warming exceptionally rapidly, promoting an expansion of shrubs across the Arctic with global-scale climate implications. The Last Interglacial (∼125,000 y ago) was the most recent time the Arctic was warmer than present and thus serves as an analogue for Arctic greening in the near future. Ancient plant DNA in lake sediment from this time reveals major ecosystem changes in response to warmth, including an ∼400 km northward shift of dwarf birch relative to today. Enhanced shrub cover, corroborated by molecular and microfossil analyses, amplified warming during the Last Interglacial and will likely play a similar role in the future. This record constitutes the oldest authenticated plant DNA from lake sediment yet reported, increasing the technique’s temporal potential.

Country

United States

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Keywords

Geologic Sediments, 550, DNA, Plant, Climate Change, Arctic greening, Last Interglacial, paleoecology, Ancient, sedimentary ancient DNA, DNA, Ancient, 580, Arctic Regions, Fossils, Plant Dispersal, Sedimentary ancient DNA, Paleontology, Geology, DNA, Plant, Climate Action, Lakes, Pollen, Paleoecology

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