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

上海大学学报(自然科学版) ›› 2015, Vol. 21 ›› Issue (03): 294-300.doi: 10.3969/j.issn.1007-2861.2015.01.013

乌江梯级水库碳氮耦合的生物地球化学循环

王宝利¹, 刘丛强¹, 汪福顺², 刘小龙³, 彭希¹, 赵颜创¹

1. 中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳550002;2. 上海大学环境与化学工程学院, 上海200444;3. 天津师范大学天津市水资源与水环境重点实验室, 天津300387)

收稿日期:2015-04-20 出版日期:2015-06-22 发布日期:2015-06-22
通讯作者: 王宝利(1976—), 男, 副研究员, 博士, 研究方向为环境地球化学. E-mail：baoliwang@163.com E-mail:baoliwang@163.com
作者简介:王宝利(1976—), 男, 副研究员, 博士, 研究方向为环境地球化学. E-mail：baoliwang@163.com
基金资助:
国家重大科学研究计划资助项目(2013CB956703); 国家自然科学基金资助项目(41473082); 中国科学院“西部之光”人才培养计划

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

摘要/Abstract

摘要： 以乌江梯级水库及相关河段为研究对象, 对溶解CO₂和NO₃⁻ 含量的时空变化特征进行了研究. 溶解CO₂平均值为(113.6±105.7) μmol·L⁻¹, 变化为1.6934.6 μmol·L⁻¹; NO₃⁻ 平均值为(163.0±104.9) μmol·L⁻¹, 变化为0.4632.0 μmol·L⁻¹. 水库采样点溶解CO₂和 NO₃⁻ 的含量以及振幅均小于相应河流采样点. 由于来源及影响因素不同, 河流采样点CO₂和 NO₃⁻不存在显著性相关. 筑坝建库后, 水库浮游植物生物作用增强, 成为影响物质循环的重要因素. 光合作用和呼吸作用将C和N的生物地球化学循环耦合在一起, 致使水库CO₂和 NO₃⁻ 表现出显著性相关. 研究结果表明, 梯级水电开发显著改变了原始河流C和N的生物地球化学循环特征.

关键词: 浮游植物, 呼吸作用, 水电开发, 碳氮耦合, 乌江

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

中图分类号:

X 142

王宝利, 刘丛强, 汪福顺, 刘小龙, 彭希, 赵颜创. 乌江梯级水库碳氮耦合的生物地球化学循环[J]. 上海大学学报(自然科学版), 2015, 21(03): 294-300.

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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乌江梯级水库碳氮耦合的生物地球化学循环

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

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