气候变化领域集成服务门户(CCPortal): The vegetation; climate; and fire history of a mountain steppe: A Holocene reconstruction from the South Caucasus; Shenkani; Armenia

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DOI	10.1016/j.quascirev.2020.106485
	The vegetation; climate; and fire history of a mountain steppe: A Holocene reconstruction from the South Caucasus; Shenkani; Armenia
	Cromartie A.; Blanchet C.; Barhoumi C.; Messager E.; Peyron O.; Ollivier V.; Sabatier P.; Etienne D.; Karakhanyan A.; Khatchadourian L.; Smith A.T.; Badalyan R.; Perello B.; Lindsay I.; Joannin S.
发表日期	2020
ISSN	0277-3791
卷号	246
英文摘要	Steppe and grassland ecosystems constitute important biomes that are influenced by multiple factors such as climate, human activity, and fire. Yet how these factors have influenced the plant composition of these biomes through time continues to be understudied. This paper investigates how these mechanisms have transformed the steppe landscape recorded at the mire site of Shenkani, Armenia. This highland site, located in the South Caucasus, has a long human history of permanent settlements near the core site starting at 5500 cal. BP. A variety of biological and geochemical proxies, including pollen, non-pollen palynomorphs, macro-charcoal, 14C age model, X-ray fluorescence, loss-of-ignition, magnetic susceptibility, and a quantitative climate reconstruction inferred from pollen, are utilized in this paper. We find that this area has remained a steppe with small stands of trees throughout the duration of the Holocene. Changes in steppe plant composition primarily occur between semi-desert steppes (Chenopodiaceae), grassland steppes (or Poaceae dominated meadow-steppes), and mixed steppes with forest patches. In this record, two phases of local grassland expansion occurred between 9500 and 7000 cal. BP and 2500–1000 cal. BP, which covaried with local fire events. These grassland steppes were sustained until tree encroachment led to a more mixed steppe landscape around 7000 cal. BP and again at 1000 cal. BP. Climate, primarily precipitation, is the main driver of this persistent steppe landscape and the plant compositional shifts within it. However, fire and human activities contributed to steppe maintenance. © 2020 Elsevier Ltd
英文关键词	Fire; Holocene; Paleoclimatology; South Caucasus; Southwest Asia; Steppe; Vegetation dynamics
语种	英语
scopus关键词	Charcoal; Ecosystems; Fires; Forestry; Magnetic susceptibility; Plants (botany); Climate reconstruction; Geochemical proxies; Grassland ecosystems; Human activities; Loss of ignitions; Permanent settlements; Plant composition; X ray fluorescence; Climate models; biome; fire history; forest-steppe; grassland; Holocene; magnetic susceptibility; mire; mountain environment; palynomorph; plant community; Armenia [Quindio]; Caucasus; Colombia; Quindio; Amaranthaceae; Poaceae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151323
作者单位	Department of Anthropology, Cornell University, Ithaca, NY 14853, United States; EDYTEM, Université Savoie Mont-Blanc, CNRS, Le Bourget du Lac, France; Institut des Sciences de l'Evolution de Montpellier ISEM, Université de Montpellier, CNRS, EPHE, IRD, Montpellier, France; CNRS, Aix Marseille Univ, Minist Culture, LAMPEA, Aix-en-Provence, France; Univ. Savoie Mont Blanc, INRAE, CARRTEL, Thonon-les-Bains, F-74200, France; Institute of Geological Sciences, National Academy of Sciences of Armenia, Yerevan, Armenia; Department of Near Eastern Studies, Cornell University, Ithaca, NY 14853, United States; Institute of Archaeology and Ethnography, National Academy of Sciences of Armenia, Yerevan, 0025, Armenia; CNRS, Archéorient, UMR 5133, Lyon, France; Department of Anthropology, Purdue University, West Lafayette, IN 47907, United States
推荐引用方式 GB/T 7714	Cromartie A.,Blanchet C.,Barhoumi C.,et al. The vegetation; climate; and fire history of a mountain steppe: A Holocene reconstruction from the South Caucasus; Shenkani; Armenia[J],2020,246.
APA	Cromartie A..,Blanchet C..,Barhoumi C..,Messager E..,Peyron O..,...&Joannin S..(2020).The vegetation; climate; and fire history of a mountain steppe: A Holocene reconstruction from the South Caucasus; Shenkani; Armenia.Quaternary Science Reviews,246.
MLA	Cromartie A.,et al."The vegetation; climate; and fire history of a mountain steppe: A Holocene reconstruction from the South Caucasus; Shenkani; Armenia".Quaternary Science Reviews 246(2020).