DOI: 10.1016/j.quascirev.2014.04.014
Scopus记录号: 2-s2.0-84901060274
论文题名: Postglacial history of the Patagonian forest/steppe ecotone (41-43°S)
作者: Iglesias V. ; Whitlock C. ; Markgraf V. ; Bianchi M.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 94 起始页码: 120
结束页码: 135
语种: 英语
英文关键词: Austrocedrus
; Fire history
; Holocene
; Isopolls
; Nothofagus
; Patagonia
; Pollen
; Vegetation history
Scopus关键词: Climate change
; Forestry
; Austrocedrus
; Fire history
; Holocenes
; Isopolls
; Nothofagus
; Patagonia
; Pollen
; Vegetation history
; Vegetation
; coniferous tree
; ecotone
; fire history
; Holocene
; mixed forest
; paleoenvironment
; Postglacial
; steppe
; vegetation history
; Climates
; Forestry
; Plants
; Pollen
; Patagonia
英文摘要: Patagonian vegetation has dramatically changed in composition and distribution over the last 23,000 years. Although the vegetation history has been inferred from individual pollen records, the regional patterns and drivers of vegetation development are poorly understood. High resolution pollen and charcoal data from eleven sites located along the eastern flanks of the Patagonian Andes (41-43°S) were examined to reconstruct the Lateglacial and Holocene vegetation and fire history of steppe/forest ecotone and separate the relative influence of climatic versus non-climatic factors in shaping the patterns of ecological change. Pollen data indicate that, as the Lateglacial climate became progressively wetter, the initial steppe vegetation was replaced by open forest of Nothofagus in the Lateglacial and early Holocene periods, and by closed forest in the late Holocene. Fire activity was lowest during the Lateglacial/early-Holocene transition and gradually increased through the Holocene. Prior to ca5000calyr BP, the conifer Austrocedrus chilensis possibly persisted in isolated populations along the eastern boundary of its modern distribution. Cooler/more humid conditions after ca5000calyr BP allowed the development of the modern mixed Nothofagus- Austrocedrus forest. The paleoenvironmental record points to the sensitivity of the forest/steppe ecotone in the past, not only to climate but also to complex environmental feedbacks that amplified the effects of climate change. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60264
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, Montana State University, Bozeman, MT 59717, United States; Montana Institute on Ecosystems, Montana State University, Bozeman, MT 59717, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, United States; Northern Arizona University, Flagstaff, AZ 86011, United States; CONICET, Instituto Nacional de Antropología y Pensamiento Latinoamericano (INAPL), Argentina; Museo Argentino de Ciencias Naturales (MACN), Argentina
Recommended Citation:
Iglesias V.,Whitlock C.,Markgraf V.,et al. Postglacial history of the Patagonian forest/steppe ecotone (41-43°S)[J]. Quaternary Science Reviews,2014-01-01,94