气候变化领域集成服务门户(CCPortal): Postglacial history of the Steppe Altai: Climate; fire and plant diversity

CCPortal

DOI	10.1016/j.quascirev.2020.106616
	Postglacial history of the Steppe Altai: Climate; fire and plant diversity
	Natalia R.; Sergey K.; Michał S.; Xianyong C.; Snezhana Z.
发表日期	2020
ISSN	0277-3791
卷号	249
英文摘要	The Steppe Altai is a natural transition zone between the Central Asian steppes and deserts and the Siberian taiga. Various lakes located in the Kulunda lowland, the biggest part of the Steppe Altai, provide a unique archive of the environmental history of the Altai Mountain piedmont and adjacent plains. Palaeorecords from two lakes, Maloye Yarovoye and Kuchuk, provide the longest high-resolution records of the Steppe Altai and south-western Siberia, allowing us to describe the environmental history of the region with high accuracy since the last deglaciation. The main objective of this study was to establish the interrelationship between plant biodiversity, climate, and fire dynamics in the Steppe Altai from postglacial time to present day. We used several techniques for this task, including pollen and geochemical analyses, quantitative reconstruction of climate and biodiversity using multivariate statistics, and estimation of macrocharcoal accumulation rates and sources of fuel. Based on analyses of the two palaeorecords, we conclude that plant diversity and evenness show a strong positive correlation with annual precipitation. Pinus sylvestris spread throughout Kulunda lowland after 10.8 ka BP, and maximal spread of mixed coniferous-deciduous forests in south-western Siberia occurred between 7.2 and 2.7 ka BP. We propose that the maximum development of the ribbon-like forests dominated by Scotch pine characterized the Steppe Altai at that time. Forest fires occurred sparsely during the Holocene but were not inherent in pre-Holocene time. Before 650 CE, the main fuel for the fire was grass; however, forest fires rapidly increased in the Steppe Altai after 650 CE and prevailed over steppe fires after 1420 CE. Increased fire activity over the last millennium was likely human-induced. © 2020 Elsevier Ltd
英文关键词	Altai; Biodiversity; Climate; Fire; Holocene; Postglacial
语种	英语
scopus关键词	Analytical geochemistry; Arid regions; Biodiversity; Deforestation; Environmental protection; Fire hazards; Lakes; Landforms; Multivariant analysis; Plants (botany); Accumulation rates; Annual precipitation; Environmental history; Geochemical analysis; Last deglaciation; Multivariate statistics; Natural transition; Positive correlations; Fires; accumulation rate; accuracy assessment; biodiversity; environmental history; grass; Holocene; last deglaciation; pine; transition zone; Altai Mountains; Siberia; Pinus sylvestris
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/151251
作者单位	PaleoData Lab, Institute of Archaeology and Ethnography SB RAS, Novosibirsk, Russian Federation; Biological Institute, Tomsk State University, Tomsk, Russian Federation; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Potsdam, Germany; Novosibirsk State University, Novosibirsk, Russian Federation; Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russian Federation; Past Landscape Dynamics Laboratory, Institute of Geography and Spatial Organization, Polish Academy of Sciences, Warsaw, Poland; Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing, China
推荐引用方式 GB/T 7714	Natalia R.,Sergey K.,Michał S.,et al. Postglacial history of the Steppe Altai: Climate; fire and plant diversity[J],2020,249.
APA	Natalia R.,Sergey K.,Michał S.,Xianyong C.,&Snezhana Z..(2020).Postglacial history of the Steppe Altai: Climate; fire and plant diversity.Quaternary Science Reviews,249.
MLA	Natalia R.,et al."Postglacial history of the Steppe Altai: Climate; fire and plant diversity".Quaternary Science Reviews 249(2020).