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悬浮颗粒中的定量有机碳来源来自达古河-河口-州湾系统 (中国北部)

Jiang Yi-Ao Zhang¹, Yixuan Liu¹, Xiaotong Xiao¹

¹Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China.

Marine environmental research

|September 21, 2025

概括

小河对沿海有机碳 (OC) 运输产生重大影响. 这项研究分析了达古河 - 河口 - 州湾系统,揭示了不同的OC来源:河流,湿地和浮游植物,具有显著的人类活动影响.

科学领域:

海洋和河口地质化学海洋和河口地质化学
生物地质化学循环的过程
沿海的碳动力学

背景情况:

小型和中型河流对于有机碳 (OC) 运输和埋葬在沿海地区至关重要.
了解这些系统中OC的来源对于评估碳循环过程至关重要.
达古河 - 河口 - 州湾系统是一个重要的碳汇,受到人类活动的严重影响.

研究的目的:

调查大河-河口-州湾系统悬浮颗粒物 (SPM) 中有机碳 (OC) 的来源和组成.
要区分陆地,湿地和海洋OC输入.
评估人类活动对海湾的OC源的影响.

主要方法:

在悬浮颗粒物 (SPM) 中大量参数和生物标志物的全面分析.
使用稳定同位素 (δ¹³C),元素分析 (C/N比率) 和生物标志物化合物 (n-醇,n-醇,醇).
应用了三端混合模型来量化OC分数.

主要成果:

达古河是主要的河流源,提供陆地有机物和营养物质.
观察到OC来源的明显空间分区:河流SPM由河流OC占主导地位 (58%),内湾由湿地OC占主导地位 (55%),河口SPM由植物浮游生物OC占主导地位 (58%).
生物标志物表明广泛的人为影响,包括石油污染和污水排放,影响州湾的SPM.

结论:

该研究成功地使用综合方法在河流-河口-海湾连续体中对OC源进行了表征.
结果强调了小河流输入的重要作用和人类活动对沿海碳动态的重大影响.
这些发现有助于更好地了解人类影响的河口系统中的碳循环.

关键词:

生物标志物生物标志物达古河河口的河口有机碳有机碳是有机碳的组成部分.消息来源消息来源消息来源稳定的同位素是稳定的.

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