论文--中国科学院地理科学与资源研究所

论文

论文题目：	Vertically stratified water source characteristics and associated driving mechanisms of particulate organic carbon in a large floodplain lake system
第一作者：	Wang Shuoyue, Gao Yang, Jia Junjie, Lu Yao etc.
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发表年度：	2022
摘　　要：	Particulate organic carbon (POC) is an important component of lake organic carbon (C) pools, of which different factors drive vertical distributions and sources. This study used the dual stable isotope (delta C-13 and delta N-15) approach to investigate vertical POC sources and drivers in a large floodplain lake system. Findings showed that POC composition gradually changed from endogenous dominant to exogenous dominant sequentially from the surface layer to the bottom layer of Lake Poyang. Environmental factors associated with phytoplankton photosynthesis as well as nutrient levels primarily drove surface POC. Moreover, soil erosion, sediment deposition, and resus-pension strongly affected POC distribution and composition in the middle and bottom layers of the lake. POC sources were also affected by factors associated with vertical mixing, such as wind speed and water depth. Litter from C-3 plants significantly contributed to POC concentrations in the middle and bottom layers of the lake. Results from this study can benefit our overall understanding of the potential driving mechanisms of lake C cycling processes, aquatic ecosystem functions, and pollutant migration.
英文摘要：
刊物名称：	WATER RESEARCH
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论文类别：	SCI