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  2. 烟台海岸带研究所
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  4. 中科院海岸带环境过程与生态修复重点实验室
Vertical sediment stratification regulates dissolved nutrient dynamics and interface fluxes along the intertidal zone

文献类型：期刊论文

作者Li, Zhenyang4,6,7; Wang, Yueqi4; Qi, Yashu5; Xiao, Kai4,7; Han, Guangxuan7; Li, Hailong3; Liu, Liang4; Jiang, Dejuan7; Zhang, Xiaoying2; Zheng, Chunmiao1
刊名JOURNAL OF HYDROLOGY
出版日期2026-04-01
卷号668页码:16
关键词Sandy beach Mudflat Seawater-groundwater exchange Coastal groundwater Nutrient dynamics
ISSN号0022-1694
DOI10.1016/j.jhydrol.2026.134980
通讯作者Xiao, Kai(kxiao@yic.ac.cns)
英文摘要Sediment stratification is a ubiquitous feature in intertidal aquifers, yet its precise role in regulating dissolved nutrient dynamics remains poorly understood. This study examined two typical kinds of intertidal transects including the sandy beach and mudflat, each exhibiting distinct sediment stratification. We analyzed the multi-depth distribution patterns of dissolved nutrients (nitrogen, phosphorus, and silicon) and carbon in intertidal groundwater. We also identified the key drivers using stable isotope tracers (delta N-15-NO3- and delta O-18-NO3-) and multivariate statistics, and quantified the interface fluxes to the coastal ocean. The findings indicated that the distribution patterns of nutrients and carbon between fineand coarse-grained sediments in both transects were synthetically influenced by hydrological dynamics and biogeochemical reactions. In the sandy beach, groundwater composition transitioned from being NO3--dominated in the deep coarse-grained sediments, where attenuation occurred via denitrification, to NH4+-dominated in the surface fine-grained sediments due to organic matter mineralization. In the mudflat, organic-rich sediments and low water exchange rates favored NH4+ dominance, with fine-grained sediments accumulating high concentrations of NH4+, PO43-, and DSi in groundwater. Moreover, the sandy beach served as hotspots for groundwater discharge, delivering nutrient and dissolved carbon fluxes up to two orders of magnitude higher than the mudflat. The presence of a surface finegrained sediments enhanced the export of groundwater-derived NH4+ and DIC, potentially exacerbating coastal eutrophication and acidification. These findings demonstrate that sediment stratification fundamentally alters the composition and flux magnitude of nutrients and carbon discharged into coastal waters, thereby influencing coastal solute budgets.
WOS关键词GROUNDWATER ; NITROGEN ; DENITRIFICATION ; BIOGEOCHEMISTRY ; NITRIFICATION ; FATE
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:001677132000001
资助机构Taishan Scholars Program ; Open Fund of the Qingdao Key Laboratory of Groundwater Resources Protection and Rehabilitation, Qingdao, China ; National Natural Science Foundation of China ; Ministry of Education of China ; Natural Science Foundation of Shandong Province, China ; Qingdao Science and Technology Demonstration Project for Benefiting the People, China
源URL[http://ir.yic.ac.cn/handle/133337/42084]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者Xiao, Kai
作者单位1.Eastern Inst Technol, Sch Environm & Sustainable Engn, Ningbo, Peoples R China
2.Jilin Univ, Coll Construct Engn, State Key Lab Deep Earth Explorat & Imaging, Changchun, Peoples R China
3.Southern Univ Sci & Technol, State Key Lab Soil Pollut Control & Safety, Shenzhen, Peoples R China
4.Qingdao Geo Engn Surveying Inst, Qingdao Key Lab Groundwater Resources Protect & Re, Qingdao, Peoples R China
5.Macau Univ Sci & Technol, Macau Environm Res Inst, Fac Innovat Engn, Macau, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
7.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remediat, Yantai, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Li, Zhenyang,Wang, Yueqi,Qi, Yashu,et al. Vertical sediment stratification regulates dissolved nutrient dynamics and interface fluxes along the intertidal zone[J]. JOURNAL OF HYDROLOGY,2026,668:16.
APA Li, Zhenyang.,Wang, Yueqi.,Qi, Yashu.,Xiao, Kai.,Han, Guangxuan.,...&Zheng, Chunmiao.(2026).Vertical sediment stratification regulates dissolved nutrient dynamics and interface fluxes along the intertidal zone.JOURNAL OF HYDROLOGY,668,16.
MLA Li, Zhenyang,et al."Vertical sediment stratification regulates dissolved nutrient dynamics and interface fluxes along the intertidal zone".JOURNAL OF HYDROLOGY 668(2026):16.

入库方式： OAI收割

来源：烟台海岸带研究所

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