有机质
总有机碳
环境科学
生物地球化学循环
河口
沉积物
环境化学
潮坪
氮气
土壤有机质
海洋学
地质学
化学
生态学
土壤科学
土壤水分
生物
地貌学
有机化学
作者
Tianning Li,Gucheng Zhang,Shuai Wang,Changping Mao,Zhen Tang,Wenbo Rao
标识
DOI:10.1016/j.marpolbul.2022.114010
摘要
The Jiangsu tidal flat is a significant organic matter reservoir, but quantitative studies of organic matter sources are scarce. In this study, total organic carbon (TOC) and total nitrogen (TN) concentrations and δ13Corg and δ15Ntotal values of surface sediment from Jiangsu tidal flat were investigated for their distributions, influencing factors, and sources of organic matter. TOC and TN were high in the center of study area and correlated well with grain size, indicating hydrodynamic influence on organic matter. High TOC/TN and low δ13Corg and δ15Ntotal in estuaries were characteristic of C3 plants, soil, and fertilizer sources, suggesting source effect on the distribution of organic matter. The MixSIAR model revealed that marine sources were dominant with a contribution reaching 56.9 %, followed by uniform of C3 plants, soil and fertilizer, while domestic sewage was least prominent. This study enriched theories of the biogeochemical cycle and ecological protection in the southwestern Yellow Sea.
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