Different responses of sedimentary delta N-15 to climatic changes and anthropogenic impacts in lakes across the Eastern margin of the Tibetan Plateau
文献类型：期刊论文
| 作者 | Sheng, Enguo4; Xu, Hai4; Yu, Keke3,4; Lan, Jianghu4; Liu, Bin4; Ye, Yuanda4; Hong, Bin1; Wu, Huixian3,4; Zhou, Kangen3,4; Yeager, Kevin M.2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2016-06-01 |
| 卷号 | 123期号:2016页码:111-118 |
| 关键词 | Nitrogen Isotopes Tibetan Plateau Lacustrine Primary Productivity (Lpp) Atmospheric Nitrogen Deposition Lake Sediment |
| DOI | 10.1016/j.jseaes.2016.03.024 |
| 文献子类 | Article |
| 英文摘要 | Knowledge of historical variations in sedimentary delta N-15 values and their relation to modern ones in lakes is critical in understanding N cycling in inland aquatic systems. Here we present late Holocene sedimentary delta N-15 variations in four lakes across the Eastern margin of the Tibetan Plateau (ETP), namely Lake Qinghai and Lake Chaonaqiu over north ETP (N-ETP) area, and Lake Yihai and Lake Lugu over south ETP (S-ETP) area. The results show that: (1) during historical periods when anthropogenic forcing was weak, the centennialimulti-decadal changes in delta N-15 values were dominated by climatic changes. Higher precipitation brought greater nutrients supply and led to higher Lacustrine Primary Productivity (LPP) and higher delta N-15 values in lake sediments, and vice versa. (2) During the recent/modern epoch with enhanced anthropogenic impacts, sedimentary delta N-15 values in Lake Qinghai and Lake Chaonaqiu (mid-high latitude lakes with low LPP) showed decreasing trends, possibly related to the increased global atmospheric reactive nitrogen (Nr) deposition. On the contrary, sedimentary delta N-15 values in Lake Lugu and Lake Yihai (subtropical lakes with high LPP) showed increasing trends, most likely because more dissolved inorganic nitrogen in lake water was used during LPP processes. This study highlights that LPP plays an important role in modifying sedimentary delta N-15 values both for historical and modern times, whereas atmospheric Nr deposition seems to influence the modern/recent sedimentary delta N-15 trends in lakes with low LPP. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS关键词 | STABLE-ISOTOPE RATIOS ; ORGANIC-MATTER ; NITROGEN DEPOSITION ; LATE HOLOCENE ; ALPINE LAKES ; TREE-RINGS ; LUGU LAKE ; QINGHAI ; CHINA ; CARBON |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000378462600012 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5724]  |
| 专题 | 地球环境研究所_现代环境研究室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, State key Lab Environm Geochem, Guiyang, Peoples R China 2.Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA 3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sheng, Enguo,Xu, Hai,Yu, Keke,et al. Different responses of sedimentary delta N-15 to climatic changes and anthropogenic impacts in lakes across the Eastern margin of the Tibetan Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,123(2016):111-118. |
| APA | Sheng, Enguo.,Xu, Hai.,Yu, Keke.,Lan, Jianghu.,Liu, Bin.,...&Yeager, Kevin M..(2016).Different responses of sedimentary delta N-15 to climatic changes and anthropogenic impacts in lakes across the Eastern margin of the Tibetan Plateau.JOURNAL OF ASIAN EARTH SCIENCES,123(2016),111-118. |
| MLA | Sheng, Enguo,et al."Different responses of sedimentary delta N-15 to climatic changes and anthropogenic impacts in lakes across the Eastern margin of the Tibetan Plateau".JOURNAL OF ASIAN EARTH SCIENCES 123.2016(2016):111-118. |
入库方式： OAI收割
来源：地球环境研究所
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