Total n content and delta n-15 signatures in moss tissue for indicating varying atmospheric nitrogen deposition in guizhou province, china
文献类型：期刊论文
| 作者 | Qu, Linglu1,2; Xiao, Huayun1; Guan, Hui1; Zhang, Zhongyi1,2; Xu, Yu1,2 |
| 刊名 | Atmospheric environment
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 142页码:145-151 |
| 关键词 | Atmospheric Nitrogen deposition Nh4+-n No3--n Moss Guizhou |
| ISSN号 | 1352-2310 |
| DOI | 10.1016/j.atmosenv.2016.07.044 |
| 通讯作者 | Xiao, huayun(xiaohuayun@vip.skleg.cn) |
| 英文摘要 | Unsurprisingly, the amount of reactive nitrogen circulating annually on land has been doubled because of increasing anthropogenic activities. exceedingly large amounts of reactive nitrogen (n-r) are likely to disrupt n dynamics and negatively impact the environment and human health. guizhou province, a major energy-producing province in southwest china, is suffering from serious long-term acid deposition. however, little work has been done to quantify the levels of atmospheric n deposition in this province, in which some ecologically vulnerable areas have resulted from rocky desertification. in this study, tissue n contents and delta n-15 signatures in 109 epilithic mosses were analyzed by the ordinary kriging (ok) interpolation technique to determine atmospheric n deposition. moss n content (136-2.65%) showed a significant decrease from west to east, indicating that the spatial variance of tn deposition was the same as that of moss n content, with an average of 27.74 kg n ha(-1) yr(-1). moss delta n-15 ranged from -5.89 parts per thousand to -0.72 parts per thousand and showed an opposite spatial variance compared with moss n contents. negative delta n-15 indicated that the main sources for n deposition were urban sewage and agricultural nh3. according to moss delta n-15 values, it could be concluded that nh4+-n and no3--n were the main components of wet deposition, accounting for 52% and 44% of tn, respectively. the deposition fluxes were 14.49 kg n ha(-1) yr(-1) and 12.16 kg n ha(-1) yr(-1), respectively. although the emission flux of no3--n far exceeded that of nh4+-n, the amount of nh4+-n deposited on land was larger than that of no3--n. n deposition in 99.6% of the province exceeded the critical load for terrestrial ecosystems. high n deposition is the main environmental problem facing guizhou province, and recommendations regarding regulatory strategies for mitigating atmospheric n pollution are urgently needed. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | N-15 NATURAL-ABUNDANCE ; SW CHINA ; GLOBAL ASSESSMENT ; EPILITHIC MOSSES ; WET DEPOSITION ; AIR-POLLUTION ; UNITED-STATES ; ECOSYSTEMS ; GUIYANG ; SULFUR |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000383293100014 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376021 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xiao, Huayun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Linglu,Xiao, Huayun,Guan, Hui,et al. Total n content and delta n-15 signatures in moss tissue for indicating varying atmospheric nitrogen deposition in guizhou province, china[J]. Atmospheric environment,2016,142:145-151. |
| APA | Qu, Linglu,Xiao, Huayun,Guan, Hui,Zhang, Zhongyi,&Xu, Yu.(2016).Total n content and delta n-15 signatures in moss tissue for indicating varying atmospheric nitrogen deposition in guizhou province, china.Atmospheric environment,142,145-151. |
| MLA | Qu, Linglu,et al."Total n content and delta n-15 signatures in moss tissue for indicating varying atmospheric nitrogen deposition in guizhou province, china".Atmospheric environment 142(2016):145-151. |
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来源：中国科学院大学
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