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引用本文:张萍,冯婧,李哲,郭劲松,肖艳,刘静.三峡澎溪河高阳平湖高水位时碱性磷酸酶活性及其动力学特征.湖泊科学,2015,27(4):629-636. DOI:10.18307/2015.0410
ZHANG Ping,FENG Jing,LI Zhe,GUO Jinsong,XIAO Yan,LIU Jing.Alkaline phosphatase activity and its kinetics in Lake Gaoyang, Pengxi River during high water level of the Three Gorges Reservoir. J. Lake Sci.2015,27(4):629-636. DOI:10.18307/2015.0410
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三峡澎溪河高阳平湖高水位时碱性磷酸酶活性及其动力学特征
张萍1, 冯婧1, 李哲2,3,4, 郭劲松1,2,4, 肖艳2,4, 刘静1
1.重庆大学城市建设与环境工程学院, 重庆 400045;2.中国科学院重庆绿色智能技术研究院, 重庆 400030;3.中国长江三峡集团, 北京 100030;4.中国科学院水库水环境重点实验室, 重庆 400030
摘要:
三峡水库汛末蓄水后易出现支流回水区磷累积现象,并在冬季末期常出现硅藻水华现象.为研究汛末蓄水的磷积累与冬季末期硅藻水华的相互关系,分析2013年13月三峡澎溪河高阳平湖库湾水体中碱性磷酸酶活性、磷形态的转化和藻类生长的协同过程.结果表明,总碱性磷酸酶活性(TAPA)及其最大反应速率(Vmax)、特异性碱性磷酸酶活性(PAPA/Chl.a)及PAPA与TAPA的比值(PAPA/TAPA)随着时间推移总体呈先增加后减小而后再增加减小的双峰趋势,分别在2月中旬和3月中旬达到峰值.根据冬季末期水华暴发程的特点将其分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4个阶段.Ⅰ阶段为诱导期,水体活性磷主要来自藻类碱性磷酸酶分解的有机磷,藻类对磷过度摄取.Ⅱ阶段为过渡期,温度低,水体碱性磷酸酶活性相对较低.Ⅲ阶段为水华时期,水中碱性磷酸酶主要来源于细菌,叶绿素a浓度达到最大,溶解态反应性磷浓度达到最低;Ⅳ阶段为水华末期,水体叶绿素a浓度逐渐下降,溶解态反应性磷浓度回升,水中碱性磷酸酶主要来源于细菌.
关键词:  三峡水库  高阳平湖  支流库湾  冬季末期水华  碱性磷酸酶活性  藻类
DOI:10.18307/2015.0410
分类号:
基金项目:国家自然科学基金项目(51179215, 51309220)和中国科学院西部行动计划项目(KZCX2-XB3-14)联合资助.
Alkaline phosphatase activity and its kinetics in Lake Gaoyang, Pengxi River during high water level of the Three Gorges Reservoir
ZHANG Ping1, FENG Jing1, LI Zhe2,3,4, GUO Jinsong1,2,4, XIAO Yan2,4, LIU Jing1
1.Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, P.R.China;2.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400030, P.R.China;3.China Three Gorges Corporation, Beijing 100030, P.R.China;4.Key Laboratory of Reservoir Water Environment for Chinese Academy of Sciences, Chongqing 400030, P.R.China
Abstract:
In the tributary backwater area, the Three Gorges Reservoir, impoundment after flooding season often results in phosphorus accumulation. Meanwhile, algal blooms occur almost every year in late winter. To find their relationship, we studied the activity of alkaline phosphatase(alkaline phosphatase activity of phytoplankton-PAPA and total alkaline phosphatase activity-TAPA) and different phosphorus forms during January and March 2013. Results showed that TAPA, maximum reaction rate for total alkaline phosphatase Vmax, PAPA/TAPA and PAPA/Chl.a flunctuated greatly, reaching the first and second peak at the middle of February and March respectively. According to the characteristics of the algal blooms, we divided it into four periods Ⅰ, Ⅱ, Ⅲ and Ⅳ. The first is induction period, during which SPR was mainly from the decomposition of organic phosphorus by alkaline phosphatase of phytoplankton and meanwhile, algae presented excessive intake of phosphate. The second is transition period, when water temperature and alkaline phosphatase activity was relatively low. The third is bloom stage, during which the alkaline phosphatase was mainly from the germs, chlorophyll-a concentration reached the maximum and SPR the minimum. The last is the ending period of the algal bloom, the alkaline phosphatase was also mainly from the germs, chlorophyll-a concentration decreased and soluble reactive phosphorus concentration increased gradually.
Key words:  Three Gorges Reservoir  Lake Gaoyang  tributary backwater area  late winter algal blooms  alkaline phosphatase activity  algae
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