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夏季大型河口的营养特征由多种因素驱动:对长江河口的案例研究

Lilian Wen¹, Jinming Song², Jiajia Dai³

¹CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266400, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Marine pollution bulletin

|March 13, 2024

概括

海洋营养物质如酸 (NO3-N),酸 (PO4-P) 和酸 (SiO3-Si) 对于生态系统的稳定至关重要. 它们在长江河口的分布受到人类活动和自然因素的影响.

科学领域:

海洋生态海洋生态学
化学海洋学化学海洋学
河口研究河口研究

背景情况:

营养素是初级生产率和海洋生态系统稳定的关键调节者.
河口环境是受陆地和海洋输入影响的动态系统.

研究的目的:

在长江河口调查酸盐- (NO3-N),酸盐- (PO4-P) 和酸盐- (SiO3-Si) 的分布模式.
在2020年8月确定影响营养度的主要控制因素.

主要方法:

2020年8月进行的现场调查.
对营养物质度 (NO3-N,PO4-P,SiO3-Si) 的分析.
评估海洋学因素,包括海流,江稀释水 (CDW) 和长江舒图流 (YSC).

主要成果:

与离岸地区相比,近海地区的营养度更高.
平均度:NO3-N (11.40 μmol/L),PO4-P (0.70 μmol/L),SiO3-Si (23.73 μmol/L). 度:NO3-N (11.40 μmol/L),PO4-P (0.70 μmol/L),SiO3-Si (23.73 μmol/L). 平均度:NO3-N (11.40 μmol/L),PO4-P (0.70 μmol/L),SiO3-Si (23.73 μmol/L). 平均度:NO3-N (11.40 μmol/L) 平均度:NO3-N (11.40 μmol/L) 平均度:NO3-N (23.73 μmol/L) 平均度:NO3-N (NO3-N) 平均度:NO3-N) 平均度:NO3-N (NO3-N) 平均度:NO3-N) 平均度:NO3-N (NO3-N) 平均度:NO3-N) 平均度:NO3-N (NO3-N) 平均度:NO3-N) 平均度:NO3
海流,CDW和YSCC运输影响了营养的分布.
沉积物再悬浮有助于提高地下水营养水平.
NO3-N主要由人类活动控制;PO4-P和SiO3-Si由自然因素控制.

结论:

在长江河口的营养物质分布是复杂的,不同的营养物种有不同的控制因素.
人类活动显著影响NO3-N水平,而自然过程主导PO4-P和SiO3-Si.
了解这些因素对于管理河口健康和生产力至关重要.

关键词:

水文环境水文环境营养素营养素营养素有机物分解有机物分解重新暂停重新暂停这个夏天,夏天,夏天,夏天,夏天.长江河口的长江河口.

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