Temporal and spatial distribution characteristics of amino acids in the green tide outbreak area of Ulva prolifera in the South Yellow Sea
GAO Xin-peng1, JING Yu-ting1, SU Rong-guo1, SHI Xiao-yong1,2
1. Key Laboratory of Marine Chemistry Theory and Engineering Technology, Ministry of Education, School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; 2. Oceanography of the State Oceanic Administration Disaster Reduction Center, Beijing 100194, China
Abstract：According to the distinct growth phases of green tides, the green tides development area of Ulva prolifera was divided into two regions: south of 35°N and north of 35°N. The survey data of the South Yellow Sea in two cruises in the spring and summer of 2018 were used to analyze the spatial-temporal distribution characteristics of total dissolved amino acids (TDAA) and dissolved free amino acids (DFAA) in these two regions. The results revealed that concentrations of TDAA and DFAA showed a decreasing distribution from inshore (high) to offshore (low). In the area south of 35°N, the TDAA concentrations increased from spring to summer by 24.8% in the surface seawater and 60.6% in the middle layer seawater, respectively. However, in the area north of 35°N, the TDAA concentration was decreased by 8.7% overall, and decreased by 30.1% in the surface seawater. The uptake and utilization of DON by Ulva prolifera might be an important reason for the TDAA concentration decrease in the seawater with low DIN concentration in the area north of 35°N, which suggested that small molecular organic nitrogen, such as amino acids, played a key role in the late-stage green tide development of Ulva prolifera.
高新芃, 景玉婷, 苏荣国, 石晓勇. 南黄海浒苔绿潮暴发区氨基酸时空分布特征[J]. 中国环境科学, 2021, 41(6): 2902-2909.
GAO Xin-peng, JING Yu-ting, SU Rong-guo, SHI Xiao-yong. Temporal and spatial distribution characteristics of amino acids in the green tide outbreak area of Ulva prolifera in the South Yellow Sea. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2902-2909.
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