Effects of the occurrence of green tide (Ulva prolifera blooms) on dissolved organic matters in the Southern Yellow Sea
WANG Lin-xiang1, LI Xiu-zhu1, TANG Xin-yu1, SU Rong-guo1, SHI Xiao-yong1,2
1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;
2. National Marine Hazard Mitigation Service, Beijing 100194, China
Through the maritime survey data from multiple cruises in the southern Yellow Sea in 2017,the variations and influencing factors of dissolved organic matter in the process of green tide (Ulva prolifera blooms) were analyzed. The high-value areas of dissolved organic carbon (DOC) were mainly located in the northwestern part of the southern Yellow Sea and that near the northern Jiangsu, indicating that the terrigenous input was one of the main resources of DOC to this area. The EEMs-Parallel factor analysis (EEMs-PARAFAC) method identified four fluorescent dissolved organic matter (FDOM) in the southern Yellow Sea:three terrestrial humic-like (C1, C2, C3) and one protein-like (C4) fluorescent components. The spatial distributions of the four fluorescent components were similar and had a significant negative correlation with salinity. As the green tide outbroke in the southern yellow sea, DOC and FDOM concentrations increased significantly, while dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) concentrations were decreased. With the gradual disappearance of the green tide, the DOC concentration was going down but still slightly higher than that before the outbreak of green tide, instead the fluorescence intensities of C2 and C4 in surface waters were increased by 11.3% and 12.6%, respectively. During this period, DOP, DON and DON/DOC were also increased. The outbreak of the green tide in the South Yellow Sea had significant impacts on the spatiotemporal distribution of dissolved organic matter.
王林项, 李修竹, 唐新宇, 苏荣国, 石晓勇. 浒苔绿潮暴发对南黄海海域溶解有机物的影响[J]. 中国环境科学, 2020, 40(2): 806-815.
WANG Lin-xiang, LI Xiu-zhu, TANG Xin-yu, SU Rong-guo, SHI Xiao-yong. Effects of the occurrence of green tide (Ulva prolifera blooms) on dissolved organic matters in the Southern Yellow Sea. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(2): 806-815.
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