文献类型：期刊文献

英文题名：Increasing intrusion of high salinity water alters the mariculture activities in Zhanjiang Bay during the past two decades identified by dual water isotopes

作者：Lao, Qibin[1,2];Wu, Junhui[1,2];Chen, Fajin[1,2,3,5];Zhou, Xin[1,2];Li, Zhiyang[4];Chen, Chunqing[1,2];Zhu, Qingmei[1,2,3];Deng, Ziyun[1,2];Li, Jiacheng[1,2]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Disa, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang 524088, Peoples R China;[4]Guangdong AIB Polytech Coll, Guangzhou 551507, Peoples R China;[5]Guangdong Ocean Univ, Coll Ocean & Meteorol, 1, Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China

年份：2022

卷号：320

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：SCI-EXPANDED(收录号：WOS:000883042500001)、、EI(收录号：20233214520705)、Scopus(收录号：2-s2.0-85135421527)、WOS

基金：This study was supported by the National Natural Science Founda- tion of China (U1901213) , Guangdong Natural Science Foundation of China (2019B1515120066) , Guangxi Natural Science Foundation of China (2020GXNSFBA297065) , Scientific Research Start -Up Foundation of Shantou University (NTF20006) , Innovation and Entrepreneurship Project of Shantou (2021112176541391) .

语种：英文

外文关键词：8D; 818O; Intrusion of high salinity water; Nutrients; Mariculture area; Zhanjiang bay

外文摘要：The decrease of river runoff caused by the intensified human activities (e.g. artificial dams) and increasing intrusion of high salinity water in the coastal bays have become a worldwide environmental problem. However, the mixing can hardly be identified by traditional method with temperature and salinity due to the complicated water sources in the coastal area. Thus, it is difficult to quantify the impact of intrusion of high salinity water on coastal ecological environment. Here, seasonal dual water isotopes (8D and 818O), hydrographic parameters, and nutrients were investigated in a typical semi-enclosed mariculture bay in South China Sea (SCS), to quantify the intrusion of high salinity water and its impact on the water environment. The results showed that salinity in the bay has increased significantly (18%) over the past two decades due to the decrease of runoff and dredging activity. Zhanjiang Bay is mainly affected by the seawater from the SCS in outer bay, and the seawater from the outer bay (89%) was significantly higher than that of freshwater (7%) in summer, despite the increase in freshwater input from the river during this period. In winter, the intrusion of high salinity water increased (accounting for 94%) due to the decrease of runoff input. However, the contribution of groundwater was similar in summer (4%) and winter (5%). The estimation results from the relationship of 818O-salinity and 8D-salinity showed that the intrusion of high salinity water has increased significantly for the past two decades (increased by 23%). This resulted in the area suitable for oyster breeding is decreasing, and the oyster breeding activities have been gradually moving to the inner bay. Moreover, the nutrients in Zhanjiang Bay were mainly originated from freshwater input in summer (54%-90%), while it changed to the SCS input from the outer bay in winter (40%- 97%). This study suggests that the intrusion of high salinity water significantly increases the salinity, and seri-ously retains the pollutants of freshwater in the bay, which poses a great threat to the oyster breeding activities in the semi-enclosed bay.