Seasonal and spatial variability of dissolved organic nitrogen concentration and composition in Daya Bay, China
文献类型：期刊论文
| 作者 | Shi, Xuesong3,4; Ye, Feng4 ; Wu, Yunchao1,2; Li, Jinlong1,2,3; Wei, Gangjian4
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| 刊名 | MARINE ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 204页码:14 |
| 关键词 | Dissolved organic nitrogen Daya bay Three-dimensional fluorescence spectroscopy Sources Nitrogen limitation |
| ISSN号 | 0141-1136 |
| DOI | 10.1016/j.marenvres.2024.106911 |
| 英文摘要 | Dissolved organic nitrogen (DON) has recently been recognized as an important nitrogen source for marine phytoplankton. However, the composition, sources, and biogeochemical cycling of DON in coastal ecosystems remain poorly understood. This study investigates the spatial distribution and seasonal variability of DON in Daya Bay, a subtropical semi-enclosed bay in the northern South China Sea. We measured DON concentrations, the DIN:DIP ratio, and the spectral characteristics of dissolved organic matter (DOM), including a(350), SUVA(254), and fluorescence components. Our findings reveal clear seasonal differences in the controlling factors for DON distribution: in summer, land-based sources and biological activities dominate, whereas in winter, oceanic circulation and its associated water mass mixing play a predominant role. The combined spectral indexes suggest that the transformation of DON is significantly more active in summer than in winter. Additionally, most stations exhibited low DIN:DIP ratios (<16) and relatively high chlorophyll a concentrations (>2 mu g/L) during the summer months, while DIP concentrations in Daya Bay remained generally low (<1 mu mol L-1). This suggests that phytoplankton may assimilate DON, potentially leading to algal blooms and changes in population structure. Overall, these findings highlight the potential role of DON in the coastal nitrogen budget and phytoplankton dynamics, emphasizing the need for further investigation. |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Toxicology |
| 语种 | 英语 |
| WOS记录号 | WOS:001393056500001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81836]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Ye, Feng |
| 作者单位 | 1.Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 511458, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Xuesong,Ye, Feng,Wu, Yunchao,et al. Seasonal and spatial variability of dissolved organic nitrogen concentration and composition in Daya Bay, China[J]. MARINE ENVIRONMENTAL RESEARCH,2025,204:14. |
| APA | Shi, Xuesong,Ye, Feng,Wu, Yunchao,Li, Jinlong,&Wei, Gangjian.(2025).Seasonal and spatial variability of dissolved organic nitrogen concentration and composition in Daya Bay, China.MARINE ENVIRONMENTAL RESEARCH,204,14. |
| MLA | Shi, Xuesong,et al."Seasonal and spatial variability of dissolved organic nitrogen concentration and composition in Daya Bay, China".MARINE ENVIRONMENTAL RESEARCH 204(2025):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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