干旱区生态环境知识资源中心(Arid): The impact of climate change and human activity on the ecological status of Bosten Lake, NW China, revealed by a diatom record for the last 2000 years

Arid

DOI	10.1177/0959683619865586
	The impact of climate change and human activity on the ecological status of Bosten Lake, NW China, revealed by a diatom record for the last 2000 years
	Fontana, Luciane; Sun, Mingjie; Huang, Xiaozhong; Xiang, Lixiong
通讯作者	Huang, Xiaozhong
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2019
卷号	29 期号:12 页码:1871-1884
英文摘要	We present a 2000-year high-resolution diatom record from Bosten Lake (Yanqi Basin, Xinjiang), which is the largest inland freshwater lake in China. Our aims were to investigate the influence of climate change and human activity on its aquatic ecology during the late Holocene. During AD 280-480, a low water level and high salinity occurred, based on the dominance of epipelic and brackish diatoms. In addition, the diatom stratigraphy, combined with records of mean grain size and carbonate content, suggests that the lake experienced a high level of eolian input from the surrounding dunes. We hypothesize that during this interval, Loulan Kingdom, an important city of the Han Dynasty, located downstream of Bosten Lake, was abandoned due to the increasing scarcity of water resources and related harsh environmental conditions, including stronger eolian activity, which were the consequences of climate change. The dominance of meso-eutrophic small fragilarioid diatoms coincides with warm and arid intervals which also correspond to intensified human activity. These intervals correspond to the development of the Tang Dynasty (from similar to AD 600), the 'Medieval Warm Period' (AD 1000-1200), and the last similar to 200 years. A shift from meso-eutrophic/benthic diatoms to oligotrophic/planktonic diatoms occurred during an interval of enhanced precipitation throughout the humid 'Little Ice Age' (AD 1600-1800). A return to markedly eutrophic conditions and a decreasing lake level occurred after the 'Little Ice Age', reflecting the more arid regional environment of the last 200 years. The high variability of the proxies suggests that both climate change and human activity were the major drivers of the ecological status of Bosten Lake during the late Holocene. We suggest that both the continuous increase of human activity and ongoing global warming will cause the major eutrophication or salinization of the freshwater lakes in the arid zone of northwest China.
英文关键词	diatoms human disturbance 'Little Ice Age' Loulan Kingdom Tang Dynasty
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000480104300001
WOS关键词	WATER-QUALITY ; ICE-AGE ; LACUSTRINE SEDIMENTS ; ORGANIC-MATTER ; ANCIENT LOULAN ; PHOSPHORUS ; XINJIANG ; BACILLARIOPHYCEAE ; MORPHOLOGY ; CYCLOTELLA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216137
作者单位	Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Fontana, Luciane,Sun, Mingjie,Huang, Xiaozhong,et al. The impact of climate change and human activity on the ecological status of Bosten Lake, NW China, revealed by a diatom record for the last 2000 years[J]. 兰州大学,2019,29(12):1871-1884.
APA	Fontana, Luciane,Sun, Mingjie,Huang, Xiaozhong,&Xiang, Lixiong.(2019).The impact of climate change and human activity on the ecological status of Bosten Lake, NW China, revealed by a diatom record for the last 2000 years.HOLOCENE,29(12),1871-1884.
MLA	Fontana, Luciane,et al."The impact of climate change and human activity on the ecological status of Bosten Lake, NW China, revealed by a diatom record for the last 2000 years".HOLOCENE 29.12(2019):1871-1884.