| 降雨对香溪河库湾主要藻种原位生长的影响 |
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| 引用本文： | 翁传松,刘德富,张佳磊,龚川,沈旭舟. 降雨对香溪河库湾主要藻种原位生长的影响[J]. 环境科学, 2019, 40(7): 3108-3117 |
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| 作者姓名： | 翁传松 刘德富 张佳磊 龚川 沈旭舟 |
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| 作者单位： | 湖北工业大学土木建筑与环境学院,河流生态修复与藻类利用湖北省重点实验室,武汉430068;湖北工业大学土木建筑与环境学院,河流生态修复与藻类利用湖北省重点实验室,武汉430068;三峡大学水利与环境学院,三峡库区生态环境教育部工程中心,宜昌443002 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2017ZX07101003-008）；科技部国际科技合作专项（2014DFE70070）；国家自然科学基金青年科学基金项目（51209190） |
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| 摘 要： | 为明晰蓄水期降雨对三峡库区香溪河支流主要藻种原位生长的影响因素,本文在三峡水库降雨前后采用原位培养装置(培养笼)对铜绿微囊藻、小球藻和栅藻生物量变化特征进行原位培养实验.结果表明:①研究期间(2017年10月4～18日)降雨期与非降雨期水动力条件存在显著性差异(ANOVA,P 0. 05),降雨期间3种主要藻种Chl-a总量、比生长速率均显著小于非降雨期(ANOVA,P 0. 05),表明降雨对藻类生长起一定的抑制作用;相关分析结果指出,表征垂向掺混的4个水动力参数与3种藻种比生长速率呈显著/极显著负相关关系,表明水动力条件中剪切力τ、垂向紊流黏性系数Vr和垂向紊流扩散系数Vt的改变是导致藻类迅速衰亡的关键因素;②降雨前培养装置内混合层深度较低(1～2 m),降雨后(10月10～18日)混合层深度明显上升(大于5 m),同时降雨期叶绿素a(Chl-a)浓度显著低于非降雨期(ANOVA,P 0. 05).相关分析结果表明,光混比与3种藻种的比生长速率呈显著/极显著正相关,表明降雨导致水体垂向扰动增强,混合层不断扩大,打破了水体原有的水温分层从而抑制藻类的生长增殖;③降雨量、水温、光照强度、总氮(TN)和溶解性总氮(DTN)在降雨期与非降雨期均存在显著差异(ANOVA,P 0. 05),相关分析表明,降雨带来降雨量、水温、光照强度、总氮(TN)和溶解性总氮(DTN)改变是影响3种主要藻种比生长速率的关键环境参数.
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| 关 键 词： | 降雨 垂向掺混 光混比 原位生长 三峡水库 |
| 收稿时间： | 2018-11-28 |
| 修稿时间： | 2019-02-18 |
Influence of Rainfall on the in situ Growth of Dominant Algae Species in Xiangxi River |
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| WENG Chuan-song,LIU De-fu,ZHANG Jia-lei,GONG Chuan and SHEN Xu-zhou. Influence of Rainfall on the in situ Growth of Dominant Algae Species in Xiangxi River[J]. Chinese Journal of Environmental Science, 2019, 40(7): 3108-3117 |
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| Authors: | WENG Chuan-song LIU De-fu ZHANG Jia-lei GONG Chuan SHEN Xu-zhou |
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| Affiliation: | Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, College of Civil Engineering and Construction and Environment, Hubei University of Technology, Wuhan 430068, China,Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, College of Civil Engineering and Construction and Environment, Hubei University of Technology, Wuhan 430068, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China,Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, College of Civil Engineering and Construction and Environment, Hubei University of Technology, Wuhan 430068, China,Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, College of Civil Engineering and Construction and Environment, Hubei University of Technology, Wuhan 430068, China and Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, College of Civil Engineering and Construction and Environment, Hubei University of Technology, Wuhan 430068, China |
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| Abstract: | |
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| Keywords: | rainfall vertical mixing the ratio of eutrophic depth to mixing depth in situ growth Three Gorges Reservoir |
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