DOI: 10.1016/j.quascirev.2015.08.015
Scopus记录号: 2-s2.0-84940093922
论文题名: Vegetation, climate and lake changes over the last 7000 years at the boreal treeline in north-central Siberia
作者: Klemm J. ; Herzschuh U. ; Pestryakova L.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 147 起始页码: 422
结束页码: 434
语种: 英语
英文关键词: Larix gmelinii
; Mean July temperature
; Ordination
; Palynology
; Procrustes rotation
; Sediment geochemistry
; Tundra-taiga ecotone
; WA-PLS
Scopus关键词: Catchments
; Climate change
; Lakes
; Landforms
; Runoff
; Vegetation
; Larix gmelinii
; Ordination
; Palynology
; Procrustes
; Sediment geochemistries
; Tundra-taiga ecotone
; WA-PLS
; Forestry
; Larix
; Larix gmelinii
英文摘要: Palaeoecological investigations in the larch forest-tundra ecotone in northern Siberia have the potential to reveal Holocene environmental variations, which likely have consequences for global climate change because of the strong high-latitude feedback mechanisms. A sediment core, collected from a small lake (radius ∼100 m), was used to reconstruct the development of the lake and its catchment as well as vegetation and summer temperatures over the last 7100 calibrated years. A multi-proxy approach was taken including pollen and sedimentological analyses. Our data indicate a gradual replacement of open larch forests by tundra with scattered single trees as found today in the vicinity of the lake. An overall trend of cooling summer temperature from a ∼2 °C warmer-than-present mid-Holocene summer temperatures until the establishment of modern conditions around 3000 years ago is reconstructed based on a regional pollen-climate transfer function. The inference of regional vegetation changes was compared to local changes in the lake's catchment. An initial small water depression occurred from 7100 to 6500 cal years BP. Afterwards, a small lake formed and deepened, probably due to thermokarst processes. Although the general trends of local and regional environmental change match, the lake catchment changes show higher variability. Furthermore, changes in the lake catchment slightly precede those in the regional vegetation. Both proxies highlight that marked environmental changes occurred in the Siberian forest-tundra ecotone over the course of the Holocene. © 2015 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59515
Appears in Collections: 过去全球变化的重建
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作者单位: Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Periglacial Research Unit, Telegraphenberg A 43, Potsdam, Germany; Institute for Earth and Environmental Science, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam-Golm, Germany; Department for Geography and Biology, North-eastern Federal University of Yakutsk, Belinskogo 58, Yakutsk, Russian Federation
Recommended Citation:
Klemm J.,Herzschuh U.,Pestryakova L.A.. Vegetation, climate and lake changes over the last 7000 years at the boreal treeline in north-central Siberia[J]. Quaternary Science Reviews,2016-01-01,147