globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.03.022
Scopus记录号: 2-s2.0-84962786961
论文题名:
A 6900-year history of landscape modification by humans in lowland Amazonia
作者: Bush M.B.; Correa-Metrio A.; McMichael C.H.; Sully S.; Shadik C.R.; Valencia B.G.; Guilderson T.; Steinitz-Kannan M.; Overpeck J.T.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 141
起始页码: 52
结束页码: 64
语种: 英语
英文关键词: Agriculture ; Forest enrichment ; Fossil charcoal ; Fossil diatoms ; Fossil pollen ; Human disturbance ; Iriartea ; Maize ; Mauritia ; Pre-Columbian
Scopus关键词: Agriculture ; Catchments ; Charcoal ; Climate change ; Cultivation ; Fire hazards ; Fires ; Forestry ; Lakes ; Land use ; Fossil diatoms ; Fossil pollens ; Human disturbances ; Iriartea ; Maize ; Mauritia ; Pre-Columbian ; Grain (agricultural product) ; anthropogenic effect ; charcoal ; diatom ; evergreen tree ; fire history ; fossil record ; landscape history ; lowland environment ; maize ; palynology ; Amazonia ; Bacillariophyta ; Iriartea ; Zea mays
英文摘要: A sedimentary record from the Peruvian Amazon provided evidence of climate and vegetation change for the last 6900 years. Piston cores collected from the center of Lake Sauce, a 20 m deep lake at 600 m elevation, were 19.7 m in length. The fossil pollen record showed a continuously forested catchment within the period of the record, although substantial changes in forest composition were apparent. Fossil charcoal, found throughout the record, was probably associated with humans setting fires. Two fires, at c. 6700 cal BP and 4270 cal BP, appear to have been stand-replacing events possibly associated with megadroughts. The fire event at 4270 cal BP followed a drought that caused lowered lake levels for several centuries. The successional trajectories of forest recovery following these large fires were prolonged by smaller fire events. Fossil pollen of Zea mays (cultivated maize) provided evidence of agricultural activity at the site since c. 6320 cal BP. About 5150 years ago, the lake deepened and started to deposit laminated sediments. Maize agriculture reached a peak of intensity between c. 3380 and 700 cal BP. Fossil diatom data provided a proxy for lake nutrient status and productivity, both of which peaked during the period of maize cultivation. A marked change in land use was evident after c. 700 cal BP when maize agriculture was apparently abandoned at this site. Iriartea, a hyperdominant of riparian settings in western Amazonia, increased in abundance within the last 1100 years, but declined markedly at c. 1070 cal BP and again between c. 80 and -10 cal BP. © 2016 Elsevier Ltd.
资助项目: We thank the people of the community of Sauce, Peru, for allowing us to investigate their lake. We would like to thank Dr. Jason Curtis of the University of Florida for conducting the nitrogen and carbon assays. This work was supported by grants from the National Science Foundation to Bush and Overpeck (NSF EAR-1303831, 1303830) and NASA Interdisciplinary Research in Earth Science NNX14AD31G to McMichael and Bush.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59594
Appears in Collections:过去全球变化的重建

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作者单位: Department of Biological Sciences, Florida Institute of Technology, Melbourne, FL, United States; Instituto de Geología, Universidad Nacional Autónoma de México, Mexico City, DF, Mexico; Palaeoecology and Landscape Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands; University of Florida, Gainesville, FL, United States; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA, United States; Department of Biology, Northern Kentucky University, Highland Heights, KY, United States; Department of Geosciences, The University of Arizona, 1040 E 4th Street, Tucson, AZ, United States

Recommended Citation:
Bush M.B.,Correa-Metrio A.,McMichael C.H.,et al. A 6900-year history of landscape modification by humans in lowland Amazonia[J]. Quaternary Science Reviews,2016-01-01,141
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