Rising flux of nutrients (C, N, P and Si) in the lower Mekong River
文献类型：期刊论文
| 作者 | Li, Siyue1,2 ; Bush, Richard T.1
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| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 530页码:447-461 |
| 关键词 | Nutrient flux Anthropogenic activities Nutrient limitation Nutrient stoichiometry Global change |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2015.10.005 |
| 通讯作者 | Li, SY (reprint author), So Cross Univ, Southern Cross GeoSci, POB 157, Lismore, NSW 2480, Australia. |
| 英文摘要 | Changing human land use is accelerating global element cycling and appreciably altering ecosystems in the riverine-estuarine systems. This is evident by dramatic shifts in the supply of nutrients (C, N, P, Si). However, very little is known about the magnitude and rates of these changes. We examine the Mekong, one of the world largest rivers, to assess on a whole-of-system scale, the spatial, monthly and inter-annual flux of nutrients and stoichiometric ratios using a huge data-set (1985-2011). Seasonal and spatial patterns are apparent and linked to hydrology. The estimated mean flux (x10(9) mol/y) of elements from the Mekong at Pakse are 414.5 for DIC, 4.1 for DIN (3.3 for NO3--N and 0.8 for NH4+-N), 10.2 for TN, 0.32 for DIP, 0.46 for TP and 62.8 for DSi, respectively, which are intermediate relative to other large rivers. However, compared to the river reach at Pakse, the total river fluxes are two-fold greater for C, N, P and DSi. Annual flux increases significantly for DIC, NO3--N, DIN, TN and DSi, and is especially pronounced for all N and P species during the recent decade (1998 onward). Distinct shifts of nutrient stoichiometry, with far-reaching changes for phytoplankton productivity in the Mekong estuary are also evident, as the system shifts from potentially N limited to P limited. These notable changes to the exports and ratios of nutrient variables and anthropogenically-driven nutrient concerns are becoming a defining feature of the Mekong Plume to the South China Sea. (C) 2015 Elsevier B.V. All rights reserved. |
| 资助项目 | Chinese Academy of Sciences, China ; SCU, Australia |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000365050600037 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/2039]  |
| 专题 | 生态过程与重建研究中心 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.So Cross Univ, Southern Cross GeoSci, Lismore, NSW 2480, Australia 2.Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Siyue,Bush, Richard T.. Rising flux of nutrients (C, N, P and Si) in the lower Mekong River[J]. JOURNAL OF HYDROLOGY,2015,530:447-461. |
| APA | Li, Siyue,&Bush, Richard T..(2015).Rising flux of nutrients (C, N, P and Si) in the lower Mekong River.JOURNAL OF HYDROLOGY,530,447-461. |
| MLA | Li, Siyue,et al."Rising flux of nutrients (C, N, P and Si) in the lower Mekong River".JOURNAL OF HYDROLOGY 530(2015):447-461. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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