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Carbon biogeochemical cycle is enhanced by damming in a karst river
QiongHan;  Bao-li Wang;  Cong-Qiang Liu;  Fu-shun Wang;  Xi Peng ;  Xiao-Long Liu
2018
发表期刊Science of the Total Environment
卷号616-617页码:1181-1189
摘要

Currently, there is a lack of systematic knowledge concerning carbon (C) biogeochemical cycles in impounded rivers. In this study, we investigated different C species and related environmental factors from July 2007 to June 2008 and from May 2011 to May 2012 in the impounded Wujiang River, SW China to understand the influence of dam construction on the riverine C cycle. The results showed that average concentrations of dissolved CO2, dissolved inorganic C (DIC), dissolved organic C, and particulate organic C (POC) were 81.73μmol/L, 2283.55μmol/L, 158.11μmol/L, and 37.54μmol/L, respectively. Meanwhile, δ13CDIC ranged from -10.07‰ to -4.92‰ with an average of -8.33‰, while δ13CPOC ranged from -35.30‰ to -22.28‰ with an average of -29.20‰. Thermal and chemical stratifications developed seasonally and exerted a significant influence on the C cycle of the released water. The C species and related δ13C showed remarkable heterogeneity in time and space. Evidence from δ13C demonstrated that the C system in this river was primarily influenced by carbonate weathering, whereas in the reservoir, it was primarily controlled by algal activity. The coefficients of variance for different C species in the reservoir and released water were higher than those in the river. Our study indicated that biological activity became a key controlling factor for the C biogeochemical cycle and accelerated it after damming, especially in the warm seasons. The results of this study have important implications for understanding the C cycle in elongated and deep reservoirs.

关键词Stable Carbon Isotope Carbon Cycle Phytoplankton Dam Construction Wujiang River
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8372
专题环境地球化学国家重点实验室
作者单位1.Institute of Surface-Earth System Sciences, Tianjin University, Tianjin 300072, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Institute of Applied Radiation, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201800, China
4.Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China
推荐引用方式
GB/T 7714
QiongHan;Bao-li Wang;Cong-Qiang Liu;Fu-shun Wang;Xi Peng ;Xiao-Long Liu. Carbon biogeochemical cycle is enhanced by damming in a karst river[J]. Science of the Total Environment,2018,616-617:1181-1189.
APA QiongHan;Bao-li Wang;Cong-Qiang Liu;Fu-shun Wang;Xi Peng ;Xiao-Long Liu.(2018).Carbon biogeochemical cycle is enhanced by damming in a karst river.Science of the Total Environment,616-617,1181-1189.
MLA QiongHan;Bao-li Wang;Cong-Qiang Liu;Fu-shun Wang;Xi Peng ;Xiao-Long Liu."Carbon biogeochemical cycle is enhanced by damming in a karst river".Science of the Total Environment 616-617(2018):1181-1189.
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