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Updated: Jun 20, 2025

Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology

Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology

Published on: November 5, 2014

水域内人为干扰的空间变化决定了向海洋出口的溶解有机物组成

Liyin Qu¹, Randy A Dahlgren², Shuchai Gan³

¹State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361012, China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou University, Wenzhou 325035, China; Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China.

|July 17, 2024

概括

全球土地利用变化影响河流溶解有机物 (DOM) 出口. 人类引起的干扰会产生独特的DOM特征,运输历史决定了其生物降解性和在沿海海洋中的命运.

科学领域:

环境化学环境化学
生物地质化学生物地质化学
河流生态系统河流生态系统

背景情况:

全球土地利用变化显著改变了河流溶解有机物 (DOM) 输送到海洋的情况.
了解流域干扰如何影响DOM化学多样性和反应性对于沿海生态系统健康至关重要.

研究的目的:

调查对比的人为土地利用模式对亚热带沿海河流中DOM属性的影响.
为了确定流域干扰的空间变化如何控制DOM化学多样性和被出口到海洋的反应性.

主要方法:

利用光和超高分辨率质谱分析DOM属性.
在不同土地使用分布的Jiulong河北和西部支流中比较DOM特征.
检查了DOM组成和度的空间和季节性变化.

主要成果:

在城市农业受影响地区,溶解有机碳 (DOC) 和光DOM (FDOM) 的含量更高.
城市来源的DOM富含硫和生物可变性,而农业DOM包括生物可变性和生物耐火化合物.
北河的较长的河流过境导致微生物去除可变化合物,增加DOM复原,而西河的较短过境出口了更多的生物可变DOC.

结论:

人类的土地利用创造了独特的DOM签名,影响了其生物降解性和命运.
河流过境历史是控制人类DOM转化和出口到海洋的关键因素.
土地利用和河流系统的管理对于预测和减轻DOM对沿海环境的影响至关重要.

关键词:

沿海河流是一个沿海河流.在DOM的运输运输.溶解的有机物质是有机物质.在FT-ICR MS中使用.土地使用情况土地使用情况

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