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在典型的亚热带河流-河口-海湾连续体中,溶解和颗粒的时空空间变化,分区和混合行为

Lin Yang¹, Bin Yang², Fan Yang³

¹Key Laboratory of Coastal Salt Marsh Ecosystems and Resources, Ministry of Natural Resources/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, 222005, China.

Marine pollution bulletin

|October 28, 2025

概括

陆地输入对沿海水域的动态有重大影响. 河流输入,水文因素和生物过程影响循环,特别是在雨季.

科学领域:

海洋化学和生物地球化学
河口和海岸生态学
营养素循环的循环.

背景情况:

(P) 是海洋生态系统中一个关键的限制营养素.
了解陆地输入在调节P动态中的作用对于沿海管理至关重要.
亚热带河流-河口-海湾系统是陆地影响的敏感指标.

研究的目的:

研究陆地输入如何影响河流-河口-海湾连续体中的 (P) 物种化和动态.
区分湿季和干季在P循环运动中的作用.
评估水文和生物过程对P转换的影响.

主要方法:

测量在连续的溶解无机P (DIP),溶解有机P (DOP),颗粒无机P (PIP) 和颗粒有机P (POP).
在江河口 (QRE) 的历史P度数据 (2011-2017) 的分析.
在悬浮颗粒物 (SPM) 中确定P分布系数 (logK_d) 和稳定的碳和同位素.

主要成果:

溶解无机P (DIP) 是主要的溶解P物种 (78-88%).
增加的陆地输入与QRE中较高的DIP度相关.
P表现出高粒子反应性,在SPM来源 (原生与本土) 中具有显著的季节性变化.
水文过程导致DIP在河口混合期间增加,P物种发生了密集的变化,特别是在雨季.
在雨季期间,DIP生物可用性和浮游植物吸收率更高 (以叶绿素a表示),导致DIP减少更大.

结论:

河流输入对沿海环境中的动态有很大影响.
水文和生物过程是P循环和转变的关键驱动因素.
陆地输入和水文条件的季节性变化显著改变了沿海P预算和生物可用性.

关键词:

河口水域的混合.的物种.清江河河口清江河口州湾是州湾的一个重要地区.时间空间的变化.

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