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Paleontological records indicate the occurrence of open woodlands in a dry inland climate at the present-day Arctic coast in western Beringia during the Last Interglacial

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dc.contributor.author Kienast F.
dc.contributor.author Wetterich S.
dc.contributor.author Kuzmina S.
dc.contributor.author Schirrmeister L.
dc.contributor.author Andreev A.
dc.contributor.author Tarasov P.
dc.contributor.author Nazarova L.
dc.contributor.author Kossler A.
dc.contributor.author Frolova L.
dc.contributor.author Kunitsky V.
dc.date.accessioned 2018-09-18T20:07:46Z
dc.date.available 2018-09-18T20:07:46Z
dc.date.issued 2011
dc.identifier.issn 0277-3791
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136792
dc.description.abstract Permafrost records, accessible at outcrops along the coast of Oyogos Yar at the Dmitry Laptev Strait, NE-Siberia, provide unique insights into the environmental history of Western Beringia during the Last Interglacial. The remains of terrestrial and freshwater organisms, including plants, coleopterans, chironomids, cladocerans, ostracods and molluscs, have been preserved in the frozen deposits of a shallow paleo-lake and indicate a boreal climate at the present-day arctic mainland coast during the Last Interglacial. Terrestrial beetle and plant remains suggest the former existence of open forest-tundra with larch (Larix dahurica), tree alder (Alnus incana), birch and alder shrubs (Duschekia fruticosa, Betula fruticosa, Betula divaricata, Betula nana), interspersed with patches of steppe and meadows. Consequently, the tree line was shifted to at least 270. km north of its current position. Aquatic organisms, such as chironomids, cladocerans, ostracods, molluscs and hydrophytes, indicate the formation of a shallow lake as the result of thermokarst processes. Steppe plants and beetles suggest low net precipitation. Littoral pioneer plants and chironomids indicate intense lake level fluctuations due to high evaporation. Many of the organisms are thermophilous, indicating a mean air temperature of the warmest month that was greater than 13 °C, which is above the minimum requirements for tree growth. These temperatures are in contrast to the modern values of less than 4 °C in the study area. The terrestrial and freshwater organism remains were found at a coastal exposure that was only 3.5. m above sea level and in a position where they should have been under sea during the Last Interglacial when the global sea level was 6-10. m higher than the current levels. The results suggest that during the last warm stage, the site was inland, and its modern coastal situation is the result of tectonic subsidence. © 2010 Elsevier Ltd.
dc.relation.ispartofseries Quaternary Science Reviews
dc.subject Bioindicators
dc.subject Chironomids
dc.subject Cladocerans
dc.subject Continentality
dc.subject Fossil insects
dc.subject Last Interglacial
dc.subject Molluscs
dc.subject Northern tree line
dc.subject Ostracods
dc.subject Permafrost
dc.subject Plant macrofossils
dc.subject Thermokarst
dc.subject Tundra
dc.title Paleontological records indicate the occurrence of open woodlands in a dry inland climate at the present-day Arctic coast in western Beringia during the Last Interglacial
dc.type Article
dc.relation.ispartofseries-issue 17-18
dc.relation.ispartofseries-volume 30
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 2134
dc.source.id SCOPUS02773791-2011-30-1718-SID79961210233


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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