Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye
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 prese...
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crsagepubl:10.1177/0959683619895582 2023-05-15T17:48:44+02:00 Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye Amon, Leeli Blaus, Ansis Alliksaar, Tiiu Heinsalu, Atko Lapshina, Elena Liiv, Merlin Reitalu, Triin Vassiljev, Jüri Veski, Siim Eesti Teadusagentuur Eesti Teadusagentuur Eesti Teadusagentuur International Network for Terrestrial Research and Monitoring in the Arctic INTERACT 2020 http://dx.doi.org/10.1177/0959683619895582 http://journals.sagepub.com/doi/pdf/10.1177/0959683619895582 http://journals.sagepub.com/doi/full-xml/10.1177/0959683619895582 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 30, issue 5, page 618-631 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2020 crsagepubl https://doi.org/10.1177/0959683619895582 2022-04-14T04:41:59Z 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 ~8100–8000 cal. yr BP as confirmed by a remarkable increase in the sedimentation rate and the accumulation rate of the aquatic vegetation proxies. The period of flooding coincides with the high humidity periods reconstructed from regional palaeobotanical records. About 6800–6700 cal. yr BP, the study site became isolated from the Ob River floodplain and remained a small lake until present. The diatom-based lake water pH estimates suggest fluctuations in the pH values during the Holocene, the recent decrease since 1960s being the most notable. The vegetation record revealed constant postglacial presence of tree taxa – Betula, Pinus and Picea – although in different pollen ratios and accumulation rates through time. The paludification of the surroundings occurred since ca. 8500 cal. yr BP. Article in Journal/Newspaper ob river Siberia SAGE Publications (via Crossref) The Holocene 30 5 618 631 |
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Open Polar |
collection |
SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Amon, Leeli Blaus, Ansis Alliksaar, Tiiu Heinsalu, Atko Lapshina, Elena Liiv, Merlin Reitalu, Triin Vassiljev, Jüri Veski, Siim Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
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 ~8100–8000 cal. yr BP as confirmed by a remarkable increase in the sedimentation rate and the accumulation rate of the aquatic vegetation proxies. The period of flooding coincides with the high humidity periods reconstructed from regional palaeobotanical records. About 6800–6700 cal. yr BP, the study site became isolated from the Ob River floodplain and remained a small lake until present. The diatom-based lake water pH estimates suggest fluctuations in the pH values during the Holocene, the recent decrease since 1960s being the most notable. The vegetation record revealed constant postglacial presence of tree taxa – Betula, Pinus and Picea – although in different pollen ratios and accumulation rates through time. The paludification of the surroundings occurred since ca. 8500 cal. yr BP. |
author2 |
Eesti Teadusagentuur Eesti Teadusagentuur Eesti Teadusagentuur International Network for Terrestrial Research and Monitoring in the Arctic INTERACT |
format |
Article in Journal/Newspaper |
author |
Amon, Leeli Blaus, Ansis Alliksaar, Tiiu Heinsalu, Atko Lapshina, Elena Liiv, Merlin Reitalu, Triin Vassiljev, Jüri Veski, Siim |
author_facet |
Amon, Leeli Blaus, Ansis Alliksaar, Tiiu Heinsalu, Atko Lapshina, Elena Liiv, Merlin Reitalu, Triin Vassiljev, Jüri Veski, Siim |
author_sort |
Amon, Leeli |
title |
Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
title_short |
Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
title_full |
Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
title_fullStr |
Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
title_full_unstemmed |
Postglacial flooding and vegetation history on the Ob River terrace, central Western Siberia based on the palaeoecological record from Lake Svetlenkoye |
title_sort |
postglacial flooding and vegetation history on the ob river terrace, central western siberia based on the palaeoecological record from lake svetlenkoye |
publisher |
SAGE Publications |
publishDate |
2020 |
url |
http://dx.doi.org/10.1177/0959683619895582 http://journals.sagepub.com/doi/pdf/10.1177/0959683619895582 http://journals.sagepub.com/doi/full-xml/10.1177/0959683619895582 |
genre |
ob river Siberia |
genre_facet |
ob river Siberia |
op_source |
The Holocene volume 30, issue 5, page 618-631 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683619895582 |
container_title |
The Holocene |
container_volume |
30 |
container_issue |
5 |
container_start_page |
618 |
op_container_end_page |
631 |
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1766154895909453824 |