气候变化领域集成服务门户(CCPortal): Interactions between climate change and early agriculture in SW China and their effect on lake ecosystem functioning at centennial timescales over the last 2000 years

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DOI	10.1016/j.quascirev.2020.106238
	Interactions between climate change and early agriculture in SW China and their effect on lake ecosystem functioning at centennial timescales over the last 2000 years
	Wang Q.; Anderson N.J.; Yang X.; Xu M.
发表日期	2020
ISSN	0277-3791
卷号	233
英文摘要	The responses of alpine lake ecosystems to combined climate and human impacts are ecologically important to understand. It is necessary to differentiate natural, climate-forced ecosystem changes from those driven by human disturbance with a long-term (i.e. 102–103-yr) perspective. Here a14C, 210Pb and 137Cs-dated sediment core covering approximately 2500 years was analyzed for diatoms, pigments, cladocerans and geochemistry in Lugu lake-catchment in southwest China to examine the response of the lake to climate change and human impacts. Between 1000 and 1300 AD, a warming climate coupled with declining summer monsoon precipitation resulted in the increase of oligotrophic taxa and low catchment runoff. Prior to 1300 AD the lake ecosystem was primarily responding to natural, regional climate-related processes. After 1300 AD, the clear ecological shifts and reorganizations in community structure across multiple trophic levels suggest that major transitions took place in the Lugu ecosystem. An increase in Poaceae (grass) pollen from 1300 AD indicates human settlement in the area, and is followed by rapid decline in Tsuga, most likely a consequence of logging. Use of change point analyses of the multi-proxy data demonstrate that the lake ecosystem has been highly variable since 1300 AD and exhibiting enhanced vulnerability to both natural and anthropogenic disturbance. Our results suggest that agriculture-climate interactions played a major role in the ecological transitions over the last ∼700 years. This conclusion provides insight into how the anthropogenic land-use intensity, vegetation cover and surface erosion fluctuated with natural temperature and precipitation change over the past 2000 years. © 2020 Elsevier Ltd
英文关键词	Climate change; Diatom; Human impact; Lake sediment; Monsoon precipitation
语种	英语
scopus关键词	Agriculture; Atmospheric thermodynamics; Catchments; Ecosystems; Lakes; Land use; Runoff; Anthropogenic disturbance; Change-point analysis; Diatom; Human impact; Lake sediments; Monsoon precipitation; Multiple trophic levels; Summer monsoon precipitation; Climate change; anthropogenic effect; catchment; climate change; community structure; diatom; disturbance; ecosystem function; grass; human settlement; lacustrine deposit; lake ecosystem; monsoon; precipitation (climatology); sediment core; China; Bacillariophyta; Poaceae; Tsuga
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/151552
作者单位	State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Department of Geography, Loughborough University, Loughborough, LE11 3TU, United Kingdom; College of Geography Science, Nanjing Normal University, Nanjing, 210046, China
推荐引用方式 GB/T 7714	Wang Q.,Anderson N.J.,Yang X.,et al. Interactions between climate change and early agriculture in SW China and their effect on lake ecosystem functioning at centennial timescales over the last 2000 years[J],2020,233.
APA	Wang Q.,Anderson N.J.,Yang X.,&Xu M..(2020).Interactions between climate change and early agriculture in SW China and their effect on lake ecosystem functioning at centennial timescales over the last 2000 years.Quaternary Science Reviews,233.
MLA	Wang Q.,et al."Interactions between climate change and early agriculture in SW China and their effect on lake ecosystem functioning at centennial timescales over the last 2000 years".Quaternary Science Reviews 233(2020).