Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River
文献类型：期刊论文
| 作者 | Zhang, Jun5,6; Guo, Qingjun1,5,6; Wang, Ziteng5,6; Uwiringiyimana, Ernest4,5; Wei, Rongfei6; Du, Chenjun5,6; Cui, Meng3; Fu, Pingqing2 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 615页码:10 |
| ISSN号 | 0022-1694 |
| 关键词 | Particulate nitrogen Spatiotemporal pattern SIAR model Phytoplankton Yangtze River |
| DOI | 10.1016/j.jhydrol.2022.128607 |
| 通讯作者 | Guo, Qingjun(guoqj@igsnrr.ac.cn) |
| 英文摘要 | Globally, the large rivers export amounts of particulate nitrogen (PN) to the ocean, and studying the source and biogeochemical processes of the PN in the large river is important to regional/global N budget and cycle. However, the source apportionments and transformations of the PN along the Yangtze River remain unclear. Here, the elemental and isotopic compositions (N%, delta N-15 and delta C-13 value) of suspended particulate N (SPN) and surface sediment N (SSN) were determined in the wet and dry seasons along the Yangtze River, to investigate the seasonal and spatial variation in sources apportionments and transformations of the PN. In the wet season, the delta N-15 and PN content (%) of SPN increased from the headwater stream (2.3 +/- 3.9 %o and 0.12 +/- 0.04 %, respectively) to the lower stream (6.8 +/- 2.4 %o and 0.47 +/- 0.41 %, respectively) due to the imported anthro-pogenic N into the downriver section, while there was no significant change in the dry season. There were no distinctly spatial and seasonal variations in the source apportionment of SPN. Phytoplankton was identified as the dominant source of the SPN (42.3-56.9 %), which is probably the result of reducing soil erosion, reservoir construction, rapid urbanization and development of freshwater aquaculture. Terrestrial soil was the major source of SSN (34.5-49.8 %). Furthermore, the significant relationship between the delta N-15-SPN values and NO3- concentrations, as well as the lower delta N-15-SPN value compared to that of delta N-15-NO3, indicated a strong assimi-lation process of nitrate during phytoplankton growth. Meanwhile, most of the SSN showed lower C and N concentrations and higher delta C-13 and delta N-15 values, compared to those of the SPN samples at the corresponding sampling sites, which might be due to the SSN degradation. Our findings provided valuable information for the N cycle in the Yangtze River and underlined the importance of phytoplankton in the PN inputs. |
| WOS关键词 | ORGANIC-MATTER SOURCES ; INTERANNUAL VARIABILITY ; ANTHROPOGENIC NITROGEN ; ISOTOPIC COMPOSITION ; CHANGJIANG RIVER ; PEARL RIVER ; CARBON ; PARTICLES ; SEDIMENTS ; ESTUARY |
| 资助项目 | National Natural Science Foundation ; [41890822] ; [41625006] ; [41890824] ; [41761144066] ; [41561144005] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000895732100002 |
| 资助机构 | National Natural Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/188458]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Guo, Qingjun |
| 作者单位 | 1.11A Datun Rd, Beijing 100101, Peoples R China 2.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China 3.Natl Marine Data & Informat Serv, Tianjin 300171, Peoples R China 4.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jun,Guo, Qingjun,Wang, Ziteng,et al. Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River[J]. JOURNAL OF HYDROLOGY,2022,615:10. |
| APA | Zhang, Jun.,Guo, Qingjun.,Wang, Ziteng.,Uwiringiyimana, Ernest.,Wei, Rongfei.,...&Fu, Pingqing.(2022).Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River.JOURNAL OF HYDROLOGY,615,10. |
| MLA | Zhang, Jun,et al."Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River".JOURNAL OF HYDROLOGY 615(2022):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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