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题名: Water and sediment quality in Qinghai Lake, China: a revisit after half a century
作者: Ao, Hongyi1; Wu, Chenxi1; Xiong, Xiong1, 2; Jing, Liandong1, 2; Huang, Xiaolong1, 2; Zhang, Kai1, 2; Liu, Jiantong1
通讯作者: Wu, C.(chenxi.wu@ihb.ac.cn)
关键词: Water and sediment quality ; Qinghai Lake ; Ion composition
刊名: ENVIRONMENTAL MONITORING AND ASSESSMENT
发表日期: 2014-04-01
DOI: 10.1007/s10661-013-3522-7
卷: 186, 期:4, 页:2121-2133
收录类别: SCI
文章类型: Article
部门归属: (1) Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Qinghai Lake, situated on the Qinghai-Tibet plateau, is the largest lake in China. In this study, the water and sediment quality were investigated in Qinghai Lake, three sublakes, and five major tributaries. Both Na+ and Cl- were found to be the major ions present in Qinghai Lake and the three sublakes, while Ca2+ and HCO3- dominated the tributaries. Compared with historical data from the 1960s, the concentrations of NH4+, NO3-, and soluble reactive silica have increased considerably, likely caused by increased human activities in the area. Compared to the historical data, chemical oxygen demand has increased and lake water transparency has decreased, likely related to an increase in nutrient levels. Relatively high concentrations of total nitrogen (TN) and total phosphorus (TP) were observed in Qinghai Lake sediments, although P fraction types and low water concentrations of these two indicate low possibility of transfer into the water column. The ratios of C/N suggest that the organic matter in the sediments are primarily from autochthonous sources. TN and total organic carbon in the sediment cores increased slowly up the core while TP and total inorganic carbon have been fairly constant. © 2013 Springer Science+Business Media Dordrecht.
英文摘要: Qinghai Lake, situated on the Qinghai-Tibet plateau, is the largest lake in China. In this study, the water and sediment quality were investigated in Qinghai Lake, three sublakes, and five major tributaries. Both Na+ and Cl- were found to be the major ions present in Qinghai Lake and the three sublakes, while Ca2+ and HCO3- dominated the tributaries. Compared with historical data from the 1960s, the concentrations of NH4 (+), NO3 (-), and soluble reactive silica have increased considerably, likely caused by increased human activities in the area. Compared to the historical data, chemical oxygen demand has increased and lake water transparency has decreased, likely related to an increase in nutrient levels. Relatively high concentrations of total nitrogen (TN) and total phosphorus (TP) were observed in Qinghai Lake sediments, although P fraction types and low water concentrations of these two indicate low possibility of transfer into the water column. The ratios of C/N suggest that the organic matter in the sediments are primarily from autochthonous sources. TN and total organic carbon in the sediment cores increased slowly up the core while TP and total inorganic carbon have been fairly constant.
关键词[WOS]: TIBETAN PLATEAU ; PHOSPHORUS FRACTIONATION ; ORGANIC-MATTER ; RECORDS ; TAIHU
语种: 英语
WOS记录号: WOS:000332150800010
ISSN号: 0167-6369
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19937
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
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