globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.03.030
Scopus记录号: 2-s2.0-84970016781
论文题名:
Millennial-scale vegetation changes in the north-eastern Russian Arctic during the Pliocene/Pleistocene transition (2.7–2.5 Ma) inferred from the pollen record of Lake El'gygytgyn
作者: Andreev A.A.; Tarasov P.E.; Wennrich V.; Melles M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 147
起始页码: 245
结束页码: 258
语种: 英语
英文关键词: Lake El'gygytgyn ; North-easter Russian Arctic ; Pliocene/Pleistocene transition ; Pollen record
Scopus关键词: Algae ; Climate change ; Ecosystems ; Forestry ; Vegetation ; Early pleistocene ; Marine isotope stages ; North-easter Russian Arctic ; Pliocene ; Pollen assemblage ; Pollen record ; Shallow water environment ; Vegetation change ; Lakes ; climate variation ; coniferous tree ; fossil record ; herb ; lacustrine deposit ; lake level ; marine isotope stage ; paleobotany ; paleoenvironment ; palynology ; Pliocene-Pleistocene boundary ; shrub ; vegetation dynamics ; Arctic ; Russian Federation ; Alnus ; Artemisia ; Betula nana ; Botryococcus ; Chlorophyta ; Larix ; Picea ; Zygnema
英文摘要: The sediment record of Lake El'gygytgyn (67°30′N, 172°05′E) spans the past 3.6 Ma and provides unique opportunities for qualitative and quantitative reconstructions of the regional paleoenvironmental history of the terrestrial Arctic. Millennial-scale pollen studies of the sediments that accumulated during the Late Pliocene and Early Pleistocene (ca. 2.7 to 2.5 Ma) demonstrate orbitally-driven vegetation and climate changes during this transitional interval. Pollen spectra show a significant vegetation shift at the Pliocene/Pleistocene boundary that is, however, delayed by a few thousand years compared to lacustrine response. About 2.70–2.68 Ma the vegetation at Lake El'gygytgyn, currently a tundra area was mostly dominated by larch forests with some shrub pine, shrub alder and dwarf birch in understory. During the marine isotope stages G3 and G1, ca. 2.665–2.647 and 2.625–2.617 Ma, some spruce trees grew in the local larch-pine forests, pointing to relatively warm climate conditions. At the beginning of the Pleistocene, around 2.588 Ma, a prominent climatic deterioration led to a change from larch-dominated forests to predominantly treeless steppe- and tundra-like habitats. Between ca. 2.56–2.53 Ma some climate amelioration is reflected by the higher presence of coniferous taxa (mostly pine and larch, but probably also spruce) in the area. After 2.53 Ma a relatively cold and dry climate became dominant again, leading to open steppe-like and shrubby environments followed by climate amelioration between ca. 2.510 and 2.495 Ma, when pollen assemblages show that larch forests with dwarf birch and shrub alder still grew in the lake's vicinity. Increased contents of green algae colonies (Botryococcus) remains and Zygnema cysts around 2.691–2.689, 2.679–2.677, 2.601–2.594, 2.564–2.545, and 2.532–2.510 Ma suggest a spread of shallow-water environments most likely due to a lake-level lowering. These events occurred simultaneously with dry climate conditions inferred from broad distribution of steppe habitats with Artemisia and other herbs. © 2016 Elsevier Ltd
资助项目: We like to thank all participants on the drilling campaign at Lake El'gygytgyn in spring 2009 for collecting the IDCP drill cores. C. Kramer is acknowledged for their competent help in the preparation of pollen samples. The work of A.A. Andreev was sponsored by the German Research Foundation (DFG grant ME 1169/24), the German Federal Ministry of Education and Research (BMBF, grant 03G0839A), and partly via the Russian Government Program of Competitive Growth of Kazan Federal University. The contribution of P.E. Tarasov to this study is funded via the DFG Heisenberg Program (TA 540/5).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59500
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作者单位: Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49a, Cologne, Germany; Institute of Geology and Petroleum Technologies, Kazan Federal University, Kremlyovskaya Str. 18, Kazan, Russian Federation; Free University Berlin, Institute of Geological Sciences, Palaeontology, Malteserstr. 74-100, Building D, Berlin, Germany

Recommended Citation:
Andreev A.A.,Tarasov P.E.,Wennrich V.,et al. Millennial-scale vegetation changes in the north-eastern Russian Arctic during the Pliocene/Pleistocene transition (2.7–2.5 Ma) inferred from the pollen record of Lake El'gygytgyn[J]. Quaternary Science Reviews,2016-01-01,147
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