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Composition, variation and contribution of chromophoric dissolved organic matter in Laizhou Bay estuaries, North China

文献类型： 外文期刊

作者： Xie, Lili 1 ; Guan, Weicheng 1 ; Zou, Li 1 ; Xia, Bin 3 ; Ji, Guangchao 1 ;

作者机构： 1.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China

2.Ocean Univ China, Key Lab Marine Environm Sci & Ecol, Minist Educ, Qingdao 266100, Peoples R China

3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： Laizhou bay; Xiaoqing river; CDOM; Absorption spectrum; Fluorescence spectrum

期刊名称：MARINE ENVIRONMENTAL RESEARCH （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0141-1136

年卷期： 2023 年 190 卷

页码：

收录情况： SCI

摘要： To address the complex biogeochemical processes and potential function of dissolved organic matter (DOM) in estuaries before it enters the sea, water samples were collected seasonally in a dozen Laizhou Bay estuaries and in the Yellow River estuary, North China. The results showed that chromophoric dissolved organic matter (CDOM) varied in abundance but had consistent spectral slopes at the same sampling time. Gradually, CDOM decreased while spectral slopes increased from freshwater to seawater. The spectral slope of CDOM varied temporally (higher in October and lower in August) more than it varied spatially. The fluorescent components and biological indices of CDOM indicated that in situ biological activities were the dominant sources in the waters examined in this study. The CDOM was generally more variable than the dissolved organic carbon (DOC) in most of the estuaries. However, marine CDOM may obviously increase in estuaries when indirectly stimulated by rapidly decomposing terrestrial DOM.

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