DOI: 10.1016/j.quascirev.2013.02.007
Scopus记录号: 2-s2.0-84875259192
论文题名: Late Quaternary lake records from the Anadyr Lowland, Central Chukotka (Russia)
作者: Lozhkin A. ; Anderson P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 68 起始页码: 1
结束页码: 16
语种: 英语
英文关键词: Beringia
; Chukotka
; Oxygen Isotope Stages 2 and 3
; Pollen analysis
; Postglacial thermal maximum
; Vegetation history
Scopus关键词: Beringia
; Chukotka
; Oxygen isotopes
; Pollen analysis
; Thermal maxima
; Vegetation history
; Forestry
; Isotopes
; Oxygen
; Vegetation
; Lakes
; biome
; deciduous tree
; geochronology
; hiatus
; Hypsithermal
; land bridge
; lowland environment
; meadow
; oxygen isotope
; paleoecology
; paleogeography
; paleolimnology
; palynology
; Pleistocene
; Postglacial
; shrub
; tundra
; vegetation history
; Forestry
; Isotopes
; Lakes
; Oxygen
; Plants
; Anadyr
; Bering Island
; Chukchi
; Kamchatka
; Komandorski Islands
; Russian Federation
英文摘要: Three lake cores provide insight into the vegetation and climate history of the past ~45,000 14C yr in the Anadyr Lowland, a key paleogeographic link between the Bering Land Bridge (BLB) and interior Western Beringia (WB). Although not without chronological issues, these records suggest that the Late Pleistocene interstade (approximating Oxygen Isotope Stage (OIS) 3) was a time of unstable environments consistent with previous interpretations for southern areas of WB and in contrast to more stable conditions inferred for northern WB. A hiatus in the records during OIS2 implies dry, frigid environments in the Anadyr Lowland. Previous research suggested that Chuktoka was a westward extension of relatively mesic environments of the BLB, which acted as a " filter" to intercontinental migrations. The Lowland data indicate that Chukotka may have been more of a transitional zone between mesic BLB and more xeric regions of western WB. A structurally novel biome dominated by deciduous forest and high-shrub tundra was proposed as occupying much of Beringia between ~11,000 and 9000 14C yr BP. The unusual pollen assemblage that characterizes the Lowland suggests that perhaps a second biome was also present in Beringia, one that was dominated by meadows with Betula shrub thickets. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60653
Appears in Collections: 过去全球变化的重建
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作者单位: Northeast Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, 16 Portovaya Street, Magadan, 685000, Russian Federation; Earth and Space Sciences and Quaternary Research Center, University of Washington, Seattle, 98195-1310, United States
Recommended Citation:
Lozhkin A.,Anderson P.. Late Quaternary lake records from the Anadyr Lowland, Central Chukotka (Russia)[J]. Quaternary Science Reviews,2013-01-01,68