Knowledge Management System Of Qinghai Institute of Salt Lakes,CAS
| Regional environmental change and human activity over the past hundred years recorded in the sedimentary record of Lake Qinghai, China | |
Sha, ZhanJiang; Wang, Qiugui; Wang, Jinlong; Du, Jinzhou; Hu, Jufang; Ma, Yujun; Kong, Fancui ; Wang, Zhuan
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| 第一作者 | Sha, ZhanJiang |
| 2017-04 | |
| 发表期刊 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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| ISSN | 0944-1344 |
| 卷号 | 24期号:10页码:9662-9674 |
| 关键词 | Lake Qinghai Sedimentation Rate Environmental Change Human Activity Climate Change |
| 摘要 | Environmental 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. |
| DOI | 10.1007/s11356-016-8327-0 |
| 语种 | 英语 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/6212 |
| 专题 | 青海盐湖研究所知识仓储 盐湖地质与环境实验室 |
| 推荐引用方式 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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