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Regional environmental change and human activity over the past hundred years recorded in the sedimentary record of Lake Qinghai, China
Sha, ZhanJiang1,2; Wang, Qiugui1,4; Wang, Jinlong3; Du, Jinzhou3; Hu, Jufang1,4; Ma, Yujun2; Kong, Fancui1; Wang, Zhuan2
2017-04-01
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume24Issue:10Pages:9662-9674
SubtypeArticle
AbstractEnvironmental change and human activity can be recorded in sediment cores in aquatic systems such as lakes. Information from such records may be useful for environmental governance in the future. Six sediment cores were collected from Lake Qinghai, China and its sublakes during 2012 and 2013. Measurements of sediment grain-size fractions indicate that sedimentation in the north and southwest of Lake Qinghai is dominated by river input, whereas that in Lake Gahai and Lake Erhai is dominated by dunes. The sedimentation rates in Lake Qinghai were calculated to be 0.101-0.159 cm/y, similar to the rates in other lakes on the Qinghai-Tibetan Plateau. Using these data and sedimentation rates from the literature, we compiled the spatial distribution of sedimentation rates. Higher values were obtained in the three main areas of Lake Qinghai: two in river estuaries and one close to sand dunes. Lower values were measured in the center and south of the lake. Measurements of total organic carbon (TOC), total nitrogen (TN), phosphorus concentrations, and TOC/TN ratios in three cores (QH01, QH02, and Z04) revealed four horizons corresponding to times of increased human activity. These anthropogenic events were (1) the development of large areas of cropland in the Lake Qinghai watershed in 1960, (2) the beginning of nationwide fertilizer use and increases in cropland area in the lake watershed after 1970, (3) the implementation of the national program "Grain to Green," and (4) the rapid increase in the tourism industry from 2000. Profiles of Rb, Sr concentrations, the Rb/Sr ratio, and grain-size fraction in core Z04 indicate that the climate has become drier over the past 100 years. Therefore, we suggest that lake sediments such as those in Lake Qinghai are useful media for high-resolution studies of regional environmental change and human activity.
KeywordLake Qinghai Sedimentation Rate Environmental Change Human Activity Climate Change
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordTIBET PLATEAU ; LAND-USE ; GEOCHEMISTRY ; VARIABILITY ; EVOLUTION ; ISOTOPES ; CLIMATE ; IMPACT ; LEVEL ; SR
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000399239800076
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6212
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Geol & Environm Qinghai Prov, Xining 810008, Qinghai, Peoples R China
2.Qinghai Normal Univ, Dept Geog, Xining 810008, Qinghai, Peoples R China
3.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sha, ZhanJiang,Wang, Qiugui,Wang, Jinlong,et al. Regional environmental change and human activity over the past hundred years recorded in the sedimentary record of Lake Qinghai, China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(10):9662-9674.
APA Sha, ZhanJiang.,Wang, Qiugui.,Wang, Jinlong.,Du, Jinzhou.,Hu, Jufang.,...&Wang, Zhuan.(2017).Regional environmental change and human activity over the past hundred years recorded in the sedimentary record of Lake Qinghai, China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(10),9662-9674.
MLA Sha, ZhanJiang,et al."Regional environmental change and human activity over the past hundred years recorded in the sedimentary record of Lake Qinghai, China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.10(2017):9662-9674.
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