乌江梯级水库碳氮耦合的生物地球化学循环

doi:10.3969/j.issn.1007-2861.2015.01.013

Journal of Shanghai University（Natural Science Edition） ›› 2015, Vol. 21 ›› Issue (03): 294-300.doi: 10.3969/j.issn.1007-2861.2015.01.013

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Carbon and nitrogen coupled biogeochemical cycle in cascade reservoirs of the Wujiang River

WANG Bao-li1, LIU Cong-qiang1, WANG Fu-shun2,Liu Xiao-long3, PENG Xi1, ZHAO Yan-chuang1

1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry,Chinese Academy of Sciences, Guiyang 550002, China;2. School of Environmental and Chemical Engineering, Shanghai University,Shanghai 200444, China;3. Tianjin Key Laboratory of Water Resources and Environment,Tianjin Normal University, Tianjin 300387, China

Received:2015-04-20 Online:2015-06-22 Published:2015-06-22

Abstract

Abstract: Concentrations of dissolved CO₂ and NO₃⁻ were investigated in cascade reservoirs and related river reaches along the Wujiang River to understand temporal and spatial variations. The average of dissolved CO₂ were (113.6±105.7) μmol·L⁻¹, ranging from 1.6 to 934.6 μmol·L⁻¹. The average of NO₃⁻were (163.0±104.9) μmol·L⁻¹, ranging from 0.4 to 632.0 μmol·L⁻¹. Averages and amplitudes of dissolved CO₂ and NO₃⁻ in the reservoirs are less than those in the rivers. Due to different resources and influencing factors, no significant correlation was found between dissolved CO₂ and NO₃⁻ in rivers. After damming, the activity of phytoplankton was enhanced, and became an important factor controlling material cycle in reservoirs. Photosynthesis and respiration couple C and N biogeochemical cycle, and dissolved CO₂ and NO₃⁻ in reservoirs were significantly correlated. The results indicate that C and N biogeochemical cycles in the original rivers are changed by cascade hydropower exploitation.

Key words: C-N coupling, hydropower exploitation, phytoplankton, respiration, the Wujiang River

CLC Number:

X 142

WANG Bao-Li, LIU Cong-Jiang, WANG Fu-Shun, LIU Xiao-Long, PENG Xi, ZHAO Yan-Chuang. Carbon and nitrogen coupled biogeochemical cycle in cascade reservoirs of the Wujiang River[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(03): 294-300.

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[1] Bayley P B. The flood pulse advantage and the restoration of river-floodplain systems [J].Regulated Rivers: Research and Management, 1991, 6: 75-86.

[2] Wang F S, Yu Y X, Liu C Q, et al. Dissolved silicate retention and transport in cascade reservoirs in Karst area, Southwest China [J]. Science of the Total Environment, 2010, 408(7):

1667-1675.

[3] 刘丛强, 汪福顺, 王雨春, 等. 河流筑坝拦截的水环境响应——来自地球化学的视角[J]. 长江流域资源与环境, 2009, 18(4): 384-397.

[4] Han G, Liu C Q. Water geochemistry controlled by carbonate dissolution: a study of the river waters draining karst-dominated terrain, Guizhou Province, China [J]. Chemical Geology, 2004,204: 1-21.

[5] Maberly S C. Diel, episodic and seasonal changes in pH and concentration of inorganic carbon in a productive lake [J]. Freshwater Biology, 1996, 35: 579-598.

[6] Barth J A C, Veizer J. Carbon cycle in St. Lawrence aquatic ecosystems at Cornwall (Ontario), Canada: seasonal and spatial variations [J]. Chemical Geology, 1999, 159: 107-128.

[7] Peng X, Liu C Q,Wang B L, et al. The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river [J]. Chinese Science Bulletin, 2014, 59(19): 2348-2355.

[8] Wang F S,Wang Y C, Zhang J, et al. Human impact on the historical change of CO2 degassing flux in River Changjiang [J/OL]. Geochemical Transactions, 2007, 8: 7[2007-08-09].http://www.geochemicaltransaction.com/cortent/8/1/7. DOI:10.1186/1467-4866-8-7.

[9] 郑丙辉, 曹承进, 秦延文, 等. 三峡水库主要入库河流氮营养盐特征及其来源分析[J]. 环境科学,2008, 29(1): 1-6.

[10] Yue F J, Li S L, Liu C Q, et al. Sources and transport of nitrate constrained by the isotopic technique in a karst catchment: an example from Southwest China [J]. Hydrological Processes,2015, 29(8): 1883-1893.

[11] Wang B L, Liu C Q, Wang F S, et al. A decrease in pH downstream from the hydroelectric dam in relation to the carbon biogeochemical cycle [J]. Environmental Earth Sciences, 2015,

73(9): 5299-5306.

[12] Canfield D E, Jorgensen B B, Fossing H, et al. Pathways of organic carbon oxidation in three continental margin sediments [J]. Marine Geology, 1993, 113(1/2): 27-40.

[13] Hu X P, Cai W J. An assessment of ocean margin anaerobic processes on oceanic alkalinity budget [J]. Global Biogeochemical Cycles, 2011, 25(3): GB3003.

[14] Wang B L, Liu C Q, Wang F S, et al. The distributions of autumn picoplankton in relation to environmental factors in the reservoirs along the Wujiang River in Guizhou Province, SW

China [J]. Hydrobiologia, 2008, 598(1): 35-45.

Carbon and nitrogen coupled biogeochemical cycle in cascade reservoirs of the Wujiang River

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