Abstract
River systems play an important role in the global carbon cycle. Rivers transport carbon to the ocean and also affect the carbon cycle in the coastal ocean. The flux from land to the ocean is thought to be a very important part of the land carbon budget. To investigate the effect of dam-building on dissolved organic carbon (DOC) in rivers, three reservoirs of different trophic states in the Wujiang basin, Guizhou Province, were sampled twice per month between May 2011 and May 2012. Temporal and spatial distributions of DOC in the reservoirs and their released waters were studied. It was found that different factors controlled DOC in river water, reservoir water, and released water. DOC in the rivers tended to be affected by primary production. For reservoirs, the main controlling factors of DOC concentration varied by trophic state. For the mesotrophic Hongjiadu Reservoir, the effect of primary production on DOC concentration was obvious. For the eutrophic Dongfengdu Reservoir and the hypereutrophic Wujiangdu Reservoir, primary production was not significant and DOC came instead from soil and plant litter.
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References
Bianchi TS, Allison MA (2009) Large-river delta-front estuaries as natural “recorders” of global environmental change. PNAS 106(20):8085–8092.
Catalán N, Marcé R, Kothawala DN, Tranvik LJ (2016) Organic carbon decomposition rates controlled by water retention time across inland waters. Nat Geosci 9(7):501–504. doi:10.1038/ngeo2720
Huntington TG, Balch WM, Aiken GR, Sheffield J, Luo L, Roesler CS, Camill P (2016) Climate change and dissolved organic carbon export to the Gulf of Maine. J Geophys Res Biogeosci 121(10):2700–2716. doi:10.1002/2015JG003314
Liu C-Q (2007) Biogeochemical processes and matter cycle of the earth’s surface − the basin weathering of south-west karst Area and nutrients elements cycle. Science Press, Beijing (in Chinese)
Peng X, Liu C-Q, Wang B, Zhao Y-C (2014) The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river. Chin Sci Bull 59(19):2348–2355. doi:10.1007/s11434-014-0153-5
Pumpanen J, Lindén A, Miettinen H, Kolari P, Ilvesniemi H, Mammarella I, Hari P, Nikinmaa E, Heinonsalo J, Bäck J, Ojala A, Berninger F, Vesala T (2014) Precipitation and net ecosystem exchange are the most important drivers of DOC flux in upland boreal catchments. J Geophys Res Biogeosci 119(9):1861–1878. doi:10.1002/2014JG002705
Thurman EM (1985) Organic geochemistry of natural waters. Kluwer Academic Publishers, Boston
Wang B, Liu C-Q, Wang F (2008) The distributions of autumn picoplankton in relation to environmental factors in the reservoirs along the Wujiang River in Guizhou Province, SW China. Hydrobiologia 598:35–45. doi:10.1016/j.bcp.2009.11.019
Wetzel RG (2001) Limnology: Lake and River Ecosystems. Academic press, Salt Lake
Acknowledgements
We are grateful to Zhou Yang, Lifeng Cui, BaiLing Fan, and Hongming Cai from the Institute of Geochemistry, Chinese Academy of Sciences, for collecting samples. This study was financially supported by the National Key Research and Development Program of China (2016YFA0601001) and the National Natural Science Foundation of China (Grant Nos. U1612441 and 41473082).
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Peng, X., Wang, B. & Zhao, Y. Temporal and spatial characteristics of dissolved organic carbon in the Wujiang River, Southwest China. Acta Geochim 36, 598–604 (2017). https://doi.org/10.1007/s11631-017-0195-x
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DOI: https://doi.org/10.1007/s11631-017-0195-x