气候变化领域集成服务门户(CCPortal): Ancient plant DNA reveals High Arctic greening during the Last Interglacial

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DOI	10.1073/pnas.2019069118
	Ancient plant DNA reveals High Arctic greening during the Last Interglacial
	Crump S.E.; Fréchette B.; Power M.; Cutler S.; de Wet G.; Raynolds M.K.; Raberg J.H.; Briner J.P.; Thomas E.K.; Sepúlveda J.; Shapiro B.; Bunce M.; Miller G.H.
发表日期	2021
ISSN	00278424
卷号	118 期号:13
英文摘要	Summer warming is driving a greening trend across the Arctic, with the potential for large-scale amplification of climate change due to vegetation-related feedbacks [Pearson et al., Nat. Clim. Chang. (3), 673–677 (2013)]. Because observational records are sparse and temporally limited, past episodes of Arctic warming can help elucidate the magnitude of vegetation response to temperature change. The Last Interglacial ([LIG], 129,000 to 116,000 y ago) was the most recent episode of Arctic warming on par with predicted 21st century temperature change [Otto-Bliesner et al., Philos. Trans. A Math. Phys. Eng. Sci. (371), 20130097 (2013) and Post et al., Sci. Adv. (5), eaaw9883 (2019)]. However, high-latitude terrestrial records from this period are rare, so LIG vegetation distributions are incompletely known. Pollen-based vegetation reconstructions can be biased by long-distance pollen transport, further obscuring the paleoenvironmental record. Here, we present a LIG vegetation record based on ancient DNA in lake sediment and compare it with fossil pollen. Comprehensive plant community reconstructions through the last and current interglacial (the Holocene) on Baffin Island, Arctic Canada, reveal coherent climate-driven community shifts across both interglacials. Peak LIG warmth featured a ∼400-km northward range shift of dwarf birch, a key woody shrub that is again expanding northward. Greening of the High Arctic—documented here by multiple proxies—likely represented a strong positive feedback on high-latitude LIG warming. Authenticated ancient DNA from this lake sediment also extends the useful preservation window for the technique and highlights the utility of combining traditional and molecular approaches for gleaning paleoenvironmental insights to better anticipate a warmer future. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Arctic greening; Last Interglacial; Paleoecology; Sedimentary ancient DNA
语种	英语
scopus关键词	plant DNA; Arctic; Article; birch; Canada; catchment area (hydrology); controlled study; fossil pollen; Holocene; interglacial; lake; nonhuman; plant community; polymerase chain reaction; positive feedback; priority journal; Salix brachista; sediment; sequence analysis; shrub; stratigraphy; vegetation; warming; willow
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180116
作者单位	Institute of Arctic and Alpine Research, Department of Geological Sciences, University of Colorado, Boulder, CO 80303, United States; Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95064, United States; Geotop, Université du Québec à Montréal, Montréal, H2L 2C4, Canada; Trace and Environmental DNA Laboratory, School of Molecular and Life Sciences, Curtin University, Bentley, 6845, Australia; Department of Geosciences, Smith College, Northampton, MA 01063, United States; Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Geology, University at Buffalo, Buffalo, NY 14260, United States; HHMI, University of California, Santa Cruz, CA 95064, United States; New Zealand Environment Protection Authority, Wellington, 6011, New Zealand
推荐引用方式 GB/T 7714	Crump S.E.,Fréchette B.,Power M.,et al. Ancient plant DNA reveals High Arctic greening during the Last Interglacial[J],2021,118(13).
APA	Crump S.E..,Fréchette B..,Power M..,Cutler S..,de Wet G..,...&Miller G.H..(2021).Ancient plant DNA reveals High Arctic greening during the Last Interglacial.Proceedings of the National Academy of Sciences of the United States of America,118(13).
MLA	Crump S.E.,et al."Ancient plant DNA reveals High Arctic greening during the Last Interglacial".Proceedings of the National Academy of Sciences of the United States of America 118.13(2021).