气候变化领域集成服务门户(CCPortal): Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments

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DOI	10.5194/cp-16-799-2020
	Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments
	Dietze E.; Mangelsdorf K.; Andreev A.; Karger C.; Schreuder L.T.; Hopmans E.C.; Rach O.; Sachse D.; Wennrich V.; Herzschuh U.
发表日期	2020
ISSN	18149324
起始页码	799
结束页码	818
卷号	16 期号:2
英文摘要	Landscapes in high northern latitudes are assumed to be highly sensitive to future global change, but the rates and long-term trajectories of changes are rather uncertain. In the boreal zone, fires are an important factor in climate-vegetation interactions and biogeochemical cycles. Fire regimes are characterized by small, frequent, lowintensity fires within summergreen boreal forests dominated by larch, whereas evergreen boreal forests dominated by spruce and pine burn large areas less frequently but at higher intensities. Here, we explore the potential of the monosaccharide anhydrides (MA) levoglucosan, mannosan and galactosan to serve as proxies of low-intensity biomass burning in glacial-to-interglacial lake sediments from the high northern latitudes. We use sediments from Lake El'gygytgyn (cores PG 1351 and ICDP 5011-1), located in the far northeast of Russia, and study glacial and interglacial samples of the last 430 kyr (marine isotope stages 5e, 6, 7e, 8, 11c and 12) that had different climate and biome configurations. Combined with pollen and non-pollen palynomorph records from the same samples, we assess how far the modern relationships between fire, climate and vegetation persisted during the past, on orbital to centennial timescales. We find that MAs attached to particulates were well-preserved in up to 430 kyr old sediments with higher influxes from low-intensity biomass burning in interglacials compared to glacials. MA influxes significantly increase when summergreen boreal forest spreads closer to the lake, whereas they decrease when tundra-steppe environments and, especially, Sphagnum peatlands spread. This suggests that lowtemperature fires are a typical characteristic of Siberian larch forests also on long timescales. The results also suggest that low-intensity fires would be reduced by vegetation shifts towards very dry environments due to reduced biomass availability, as well as by shifts towards peatlands, which limits fuel dryness. In addition, we observed very low MA ratios, which we interpret as high contributions of galactosan and mannosan from biomass sources other than those currently monitored, such as the moss-lichen mats in the understorey of the summergreen boreal forest. Overall, sedimentary MAs can provide a powerful proxy for fire regime reconstructions and extend our knowledge of long-term natural fire-climate-vegetation feedbacks in the high northern latitudes. © Author(s) 2020.
语种	英语
scopus关键词	biomass burning; boreal forest; Boreal Kingdom; climate feedback; evergreen forest; fire; global change; interglacial; lacustrine deposit; late glacial; long-term change; low temperature; monosaccharide; paleoclimate; proxy climate record; reconstruction; vegetation history; Chukchi; Elgygytgyn Lake; Russian Federation; Russian Federation; Siberia; Bryophyta; Larix; Picea; Sphagnum
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153201
作者单位	Polar Terrestrial Environmental Systems, Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam, Telegrafenberg, 14473, Germany; GFZ German Research Centre for Geosciences, Helmholtz Centre Potsdam, Organic Geochemistry, Potsdam, Telegrafenberg, 14473, Germany; Institute of Geology and Petroleum Technologies, Kazan Federal University, Kremlyovskaya Street 4/5, Kazan, 420008, Russian Federation; Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Utrecht University, Texel, Netherlands; GFZ, German Research Centre for Geosciences, Helmholtz Centre Potsdam, Geomorphology, Surface Organic Geochemistry Lab, Potsdam, Telegrafenberg, 14473, Germany; University of Cologne, Institute of Geology and Mineralogy, Zülpicher Str. 49a, Cologne, 50674, Germany; Institute of Environmental Sciences and Geography, University of Potsdam, Karl-Liebknecht-Str. 24-25, Potsdam, 14476, Germany; Institute of Biochemistry and Biology, University...
推荐引用方式 GB/T 7714	Dietze E.,Mangelsdorf K.,Andreev A.,et al. Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments[J],2020,16(2).
APA	Dietze E..,Mangelsdorf K..,Andreev A..,Karger C..,Schreuder L.T..,...&Herzschuh U..(2020).Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments.Climate of the Past,16(2).
MLA	Dietze E.,et al."Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments".Climate of the Past 16.2(2020).