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对沿海环境中溶解有机物的光化学和微生物降解的特定来源的见解

Bin Wang¹, Xuelu Gao², Simon F Thrush³

¹Shandong Key Laboratory of Coastal Environmental Processes, Yantai, Shandong, 264003, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Marine environmental research

|September 10, 2025

概括

人类活动改变了沿海溶解有机物 (DOM) 循环. 不同的沿海用途,如港口和水产养殖,导致独特的DOM转化途径,影响海洋生物地质化学.

科学领域:

海洋生物地质化学海洋生物地质化学
沿海生态系统的正常运作
溶解有机物 (DOM) 的动态

背景情况:

沿海地区对于海洋溶解有机物 (DOM) 循环至关重要.
由于复杂的因素,DOM通过光化学和微生物过程的转化是不太了解的.
人类活动显著影响沿海DOM来源和退化.

研究的目的:

调查不同沿海地区 (港口,水产养殖,近海) 的DOM转换机制.
在不同的人类影响下描述DOM源和降解途径.
了解人类活动如何重塑沿海生物地化学功能.

主要方法:

在14天内从三个沿海地区的DOM实验室化.
使用光刺激-发射矩阵平行因子 (EEM-PARAFAC) 和UV-Vis光谱学对DOM进行表征.
统计分析 (重复测量ANOVA) 来评估光谱变化.

主要成果:

DOM来源各不相同:港口 (混合),水产养殖 (本土),近海 (陆地/人类).
降解途径有所不同:沿海DOM是光的,水产DOM经历了微生物降解,港口DOM表现出谦卑.
人类活动将自然DOM降解解开,导致不同的碳转化途径.

结论:

沿海DOM转化受源,组成,降解阶段和环境驱动因素的调节.
人类活动显著改变了DOM降解,影响了沿海的生态化学功能.
了解这些改变的路径对于管理沿海生态系统至关重要.

关键词:

沿海海洋的沿海海洋溶解的有机物质是有机物质.人类活动人类活动光化学和微生物降解.频谱特征频谱特征频谱特征频谱特征

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