Multiple isotopic compositions reveal complex nitrogen cycling in a subtropical estuary
文献类型：期刊论文
| 作者 | Jiang, Hao2,3; Ma, Jie2; Xu, Huo2; Xu, Zhifang1; Liu, Wenjing1; Pan, Ke2 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 272页码:9 |
| 关键词 | Isotopes Nitrogen Sources Transformations Pearl river estuary |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2020.116410 |
| 英文摘要 | Nitrogen (N) pollution and the resulting eutrophication can have deleterious consequences on estuaries, such as hypoxia, fish kills, and loss of biotic diversity. An understanding of N sources and cycling in estuaries is fundamental to determining how to effectively manage these ecologically and commercially important areas. We applied a multiple-isotopic approach to examine the transformations and sources of the N pools in the Pearl River Estuary (PRE) during winter. The surface water in the West PRE was characterized by low salinity and high NO3-, while that in the east had high salinity and low NO3-. The NO3- in the West PRE was largely regulated by a conservative mixing process. In contrast, assimilation and nitrification dominated in the East PRE, which was attributed to the long water-residence time. For the first time, the source contributions of NO3- and NH4+ were estimated by isotope mixing models. Our results suggest that river discharge and nitrification contributed 81% and 12% to the NO3- pool, respectively. A major portion (68%) of the NH4+ was from river discharge, with the remainder likely from sewage and the aquitard-aquifer system. Our study demonstrates that internal nitrification can potentially be of pivotal importance in determining the NO3- level in an estuary and its export to coastal waters. (C) 2020 Elsevier Ltd. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[41676095] ; National Natural Science Foundation of China[41976140] ; Science and Technology Project of Guangxi[GuikeAB18126075] ; Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20180507182227257] ; Science, Technology and Innovation Commission of Shenzhen Municipality[KQTD20180412181334790] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000615555000107 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Science, Technology and Innovation Commission of Shenzhen Municipality ; Science, Technology and Innovation Commission of Shenzhen Municipality ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Science, Technology and Innovation Commission of Shenzhen Municipality ; Science, Technology and Innovation Commission of Shenzhen Municipality ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Science, Technology and Innovation Commission of Shenzhen Municipality ; Science, Technology and Innovation Commission of Shenzhen Municipality ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Science, Technology and Innovation Commission of Shenzhen Municipality ; Science, Technology and Innovation Commission of Shenzhen Municipality |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100993]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Pan, Ke |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Shenzhen Univ, Inst Adv Study, Shenzhen Key Lab Marine Microbiome Engn, Shenzhen 518060, Peoples R China 3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Hao,Ma, Jie,Xu, Huo,et al. Multiple isotopic compositions reveal complex nitrogen cycling in a subtropical estuary[J]. ENVIRONMENTAL POLLUTION,2021,272:9. |
| APA | Jiang, Hao,Ma, Jie,Xu, Huo,Xu, Zhifang,Liu, Wenjing,&Pan, Ke.(2021).Multiple isotopic compositions reveal complex nitrogen cycling in a subtropical estuary.ENVIRONMENTAL POLLUTION,272,9. |
| MLA | Jiang, Hao,et al."Multiple isotopic compositions reveal complex nitrogen cycling in a subtropical estuary".ENVIRONMENTAL POLLUTION 272(2021):9. |
入库方式： OAI收割
来源：地质与地球物理研究所
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