Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye ...

• Main Authors: Leeli Amon, Blaus, Ansis, Alliksaar, Tiiu, Atko Heinsalu, Lapshina, Elena, Liiv, Merlin, Reitalu, Triin, Vassiljev, Jüri, Veski, Siim
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: SAGE Journals 2020
• Subjects: Geography; History; ob river; Siberia
• Online Access: https://dx.doi.org/10.25384/sage.c.4807374.v1; https://sage.figshare.com/collections/Postglacial_flooding_and_vegetation_history_on_the_Ob_River_terrace_central_Western_Siberia_based_on_the_palaeoecological_record_from_Lake_Svetlenkoye/4807374/1

The hemispheric-scale climatic fluctuations during the Holocene have probably influenced the large Siberian rivers. However, detailed studies of the West Siberian Plain postglacial environmental change are scarce and the records of millennial-scale palaeohydrology are nearly absent. This paper presents the Holocene palaeoecological reconstruction based on the sedimentary record of Lake Svetlenkoye, located near the confluence of major Siberian rivers Ob and Irtysh. Postglacial history of flooding, dynamics of regional and local vegetation, sedimentation regime, geochemical changes and lake water pH were reconstructed based on multi-proxy studies. We used palaeobotanical (plant macrofossils, pollen, diatoms), geochemical (organic matter, total organic carbon and nitrogen content, carbon/nitrogen ratio) and chronological ( 14 C dates, spheroidal fly-ash particle counts) methods. The studied sediment section started to accumulate ~11,400 cal. yr BP. The initial shallow water body was flooded by Ob River waters ...