气候变化领域集成服务门户(CCPortal): The Eemian Lakeland of the central Polish Plain: Environmental changes and palaeogeography

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DOI	10.1016/j.palaeo.2020.110087
	The Eemian Lakeland of the central Polish Plain: Environmental changes and palaeogeography
	Roman M.; Mirosław-Grabowska J.; Niska M.
发表日期	2021
ISSN	0031-0182
卷号	561
英文摘要	The current state of recognition of Eemian/Eemian–Vistulian subfossil flora sites in central Poland is presented, as well as the results of cladoceran and isotopic investigations of the lake-bog successions of five key sites (Ruszkówek, Kaliska, Kubłowo, Besiekierz and Parchliny “2014”) and inferred environmental variability. The distribution of 58 sites is also commented on in relation to the origin of palaeolakes, the nature of their infillings and their palaeolandscape. Most (90%) of these palaeolakes were created by the melting of buried ice remaining after the Wartanian (Late Saalian, MIS 6) ice-sheet. It has been determined, from palynostratigraphy, that the decline of postglacial lakes may have taken more than 75,000 years. In the key palaeolakes, the beginning of Cladocera succession started at the end of the Wartanian and finished in the Middle Plenivistulian (MIS 3). The Middle and Late Eemian was a period of intense Cladocera development in terms of biodiversity and specimen frequency. The significant differences in Cladocera succession and development of lakes reflect in detail the significant climate changes taking place between cold and warm periods, and the most pronounced differences result from variations in the morphometry and thus hydrological stability of the investigated palaeolakes. In the largest lakes (Kubłowo) the survival chances of organisms increased in difficult times. The studied sediments are characterised by similar geochemical and isotopic features. The Early Eemian warming is expressed by a positive trend in δ18Ocarb and δ13Ccarb and an increasing amount of organic matter. The Late Eemian isotopic fluctuations are probably affected by the sedimentary infilling of the palaeolakes. The Vistulian cooling is reflected by distinctly lower values of δ18Ocarb than in the Eemian. The lowest amounts of total organic carbon are recorded in the coldest periods during the Herning, Rederstall and Schalkholz Stadials, but increased systematically during the warmer periods. © 2020 Elsevier B.V.
英文关键词	Cladocera; Eemian-Vistulian; Lake origin; Sediments; Stable isotopes
语种	英语
scopus关键词	Cladocera
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150249
作者单位	Department of Geomorphology and Palaeogeography, Faculty of Geographical Sciences, University of Łódź, Narutowicza St. 88, Łódź, PL-90-139, Poland; Institute of Geological Sciences, Polish Academy of Sciences, Research Centre in Warsaw, INGPAN, Twarda St. 51/55, Warsaw, PL-00-818, Poland; Pomeranian University in Słupsk, Institute of Geography and Regional Studies, Partyzantów St. 27, Słupsk, PL-76-200, Poland
推荐引用方式 GB/T 7714	Roman M.,Mirosław-Grabowska J.,Niska M.. The Eemian Lakeland of the central Polish Plain: Environmental changes and palaeogeography[J],2021,561.
APA	Roman M.,Mirosław-Grabowska J.,&Niska M..(2021).The Eemian Lakeland of the central Polish Plain: Environmental changes and palaeogeography.Palaeogeography, Palaeoclimatology, Palaeoecology,561.
MLA	Roman M.,et al."The Eemian Lakeland of the central Polish Plain: Environmental changes and palaeogeography".Palaeogeography, Palaeoclimatology, Palaeoecology 561(2021).