Abstract：
Nutrients directly control the level of primary productivity and are crucial for the stability of marine ecosystems. Focusing on the survey results in August 2020 of the Yangtze River Estuary, this study elucidated the distribution characteristics and controlling factors of three nutrients: NO3-N, PO4-P, SiO3-Si. The results showed that the concentrations of NO3-N, PO4-P, SiO3-Si in the study area were generally higher near the shore than far shore, with average concentrations of 11.40, 0.70, and 23.73 μmol/L, respectively. The ocean currents drove the distribution of nutrients, and the transport of CDW and YSCC increased the nutrient levels. The resuspension of sediment caused by factors such as terrain and weather may lead to an abnormal increase in nutrients in the bottom waters. The main controlling factors of the three nutrients were different. NO3-N was significantly affected by human activities, PO4-P and SiO3-Si were mainly affected by natural factors.
摘要：
养分直接控制初级生产力水平，对海洋生态系统的稳定至关重要。围绕长江口2020年8月的调查结果，本研究阐明了三种营养素：NO3-N的分布特征和控制因素，PO4-P,SiO3-Si。结果表明,NO3-N的浓度,PO4-P,研究区域的SiO3-Si通常在近岸高于远岸，平均浓度分别为11.40、0.70和23.73μmol/L，分别。洋流推动了营养物质的分布，CDW和YSCC的转运增加了营养水平。地形、天气等因素引起的泥沙再悬浮可能导致底水养分异常增加。三种营养素的主控因素不同。NO3-N受到人类活动的显著影响,PO4-P和SiO3-Si主要受自然因素的影响。
