文献类型：期刊文献

英文题名：Hydrodynamic processes and their impact on eutrophication in two distinct types of bays near the Beibu Gulf coast: insight from dual water isotopes

作者：Wu, Junhui[1,2];Cao, Ruixue[3,4,5];Lao, Qibin[3,4,5];Jin, Guangzhe[3,4,5];Lu, Xuan[6];Chen, Chunqing[3];Chen, Fajin[3,4,5];Zhang, Shuwen[1,2]

机构：[1]Shantou Univ, Inst Marine Sci, 243 Daxue Rd, Shantou 515000, Guangdong, Peoples R China;[2]Shantou Univ, Guangdong Prov Key Lab Marine Disaster Predict & P, Shantou, Peoples R China;[3]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[5]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov, Zhanjiang 524088, Peoples R China;[6]Jimei Univ, Polar & Marine Res Inst, Coll Harbor & Coastal Engn, Xiamen 361021, Peoples R China

年份：2026

卷号：215

外文期刊名：MARINE ENVIRONMENTAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:001664321700003)、、EI(收录号：20260219891788)、Scopus(收录号：2-s2.0-105026999706)、WOS

基金：This study was supported by the Basic and Applied Basic Research Foundation of Guangdong Province (2023B1515120029) , National Natural Science Foundation of China (92158201, 42376001, 42276047) , and Innovation and Entrepreneurship Project of Shantou (2021112176541391) .

语种：英文

外文关键词：Hydrodynamic processes; Dual water isotopes; Nutrients; Water masses; Beibu Gulf

外文摘要：Quantitative understanding of hydrodynamic processes and nutrient supply in different types of small bays remains limited. By combining water isotopes, hydrological parameters, and nutrient analysis, our findings revealed that Qinzhou Bay (a bay with multiple riverine inputs) is significantly influenced by coastal diluted water (49 %), while Tieshangang Bay (a bay without riverine input) is mainly influenced by high-salinity seawater outside the bay (61 %) during the early rainy season. However, despite these differences, Tieshangang Bay receives a greater proportion of nutrient supply from diluted water (69-95 %) compared to Qinzhou Bay (58-87 %). This disparity is related with the higher seawater intrusion into the Tieshangang Bay, which creates an internal salinity front that inhibits nutrient diffusion outside the bay. The barrier effect of the front hinders the expansion of terrestrial nutrients out of the bay, and accumulates in the bay, exacerbating the seawater eutrophication in the inner Tieshangang bay. This results in a significantly higher degree of eutrophication in Tieshangang Bay compared to Qinzhou Bay. Our study provides valuable insights into the hydrodynamic processes and their impact on eutrophication in different types of bays, emphasizing the importance of the existence of rivers for nutrient transport in small bays.