气候变化领域集成服务门户(CCPortal): Mid to late Holocene environmental change and human impact: A view from Central China

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DOI	10.1016/j.quascirev.2019.105953
	Mid to late Holocene environmental change and human impact: A view from Central China
	Lu F.; Dodson J.; Zhang W.; Yan H.
发表日期	2019
ISSN	0277-3791
卷号	223
英文摘要	Dajiuhu, a rare peatland in Central China, has attracted several studies. There are differences in the interpretations of its Holocene record, and little has been written on landscape transformation by human impact. A 6100 yr palynologic record, together with TOC and charcoal data, from Dajiuhu peatland is assessed to provide a new perspective on mid-late Holocene environmental change and human activity. We found that wetland herb pollen is a sensitive marker of effective precipitation, and the ratio of evergreen and deciduous tree pollen can be a proxy for temperature variability at the site. A mixed evergreen and deciduous forest dominates the record. Peak warming was at 2900 cal yr BP and cool events occurred around 5100, 4100 and 2700 cal yr BP. The cooling at 5100 and 2700 cal yr BP may be related to decreased solar activity. There was a long-term drying trend punctuated by episodic droughts around 3000 to 2800 cal yr BP and following 1500 cal yr BP; we argue that these relate to the southward retreat of the ITCZ. A low level of regional fires was present as background. At 800 cal yr BP there were declines in forest taxa, increases in ferns, herbs, burning and inorganic inputs into the sediment; these signal sustained human impact in the area. The relatively late human impact is probably related to the rugged mountain landscape and river systems prone to frequent flooding, or may be due to a late expansion in human population and land resource pressures at Dajiuhu. © 2019 Elsevier Ltd
英文关键词	China; Holocene; Human impact; ITCZ; Paleoclimatology; Solar activity; Vegetation dynamics
语种	英语
scopus关键词	Charcoal; Solar energy; Solar radiation; Wetlands; China; Holocenes; Human impact; ITCZ; Paleoclimatology; Solar activity; Vegetation dynamics; Forestry; anthropogenic effect; deciduous forest; environmental change; herb; Holocene; intertropical convergence zone; paleoclimate; palynology; peatland; pollen; precipitation (climatology); solar activity; vegetation dynamics; wetland; China; Filicophyta
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/151726
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Yanta District, Xi'an, Shaanxi 710061, China; College of Marine Geosciences, Ocean University of China, Qingdao, 266100, China
推荐引用方式 GB/T 7714	Lu F.,Dodson J.,Zhang W.,et al. Mid to late Holocene environmental change and human impact: A view from Central China[J],2019,223.
APA	Lu F.,Dodson J.,Zhang W.,&Yan H..(2019).Mid to late Holocene environmental change and human impact: A view from Central China.Quaternary Science Reviews,223.
MLA	Lu F.,et al."Mid to late Holocene environmental change and human impact: A view from Central China".Quaternary Science Reviews 223(2019).