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引用本文:王经结,杨佳,鲜啟鸣,钱新,李正魁,耿金菊,孙成.太湖微囊藻毒素时空分布特征及与环境因子的关系.湖泊科学,2011,23(4):513-519. DOI:10.18307/2011.0404
WANG Jingjie,YANG Jia,XIAN Qiming,QIAN Xin,LI Zhengkui,GENG Jinju,SUN Cheng.Characteristic of microcystin distributions and its relationships with environmental factors in Lake Taihu. J. Lake Sci.2011,23(4):513-519. DOI:10.18307/2011.0404
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太湖微囊藻毒素时空分布特征及与环境因子的关系
王经结, 杨佳, 鲜啟鸣, 钱新, 李正魁, 耿金菊, 孙成
南京大学环境学院污染控制与资源化研究国家重点实验室, 南京 210093
摘要:
采用高效液相色谱法(HPLC)对太湖水体中溶解态微囊藻毒素(MC-LR;MC-RR)浓度进行检测, 探讨微囊藻毒素浓度的时空变化及其与氮、磷、总有机碳、蓝藻生物量以及温度等湖泊环境因子之间的关系.结果表明:微囊藻毒素表底层浓度基本一致;在一天之内的变化没有明显规律;冬季微囊藻毒素浓度较高;位于竺山湾和西部沿岸地区的两个点(N5和N1)的微囊藻毒素浓度在一年之中变动较大;MC-LR浓度一般大于MC-RR, 但在8, 9两月出现相反的结果.水中溶解性微囊藻毒素与各环境因子的相关性分析表明微囊藻毒素与总氮呈极显著正相关, 与总磷无显著相关性.在蓝藻暴发期, MC-LR与总氮、总磷、SS、总有机碳、蓝藻生物量呈极显著正相关;MC-RR与所测的环境因子皆无显著相关性。
关键词:  微囊藻毒素  太湖  环境因子  相关性
DOI:10.18307/2011.0404
分类号:
基金项目:国家"973"计划项目(2008CB418003);国家水体污染控制与治理科技重大专项(008ZX07421-002)项目联合资助
Characteristic of microcystin distributions and its relationships with environmental factors in Lake Taihu
WANG Jingjie, YANG Jia, XIAN Qiming, QIAN Xin, LI Zhengkui, GENG Jinju, SUN Cheng
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, P.R.China
Abstract:
In this paper,the high performance liquid chromatography(HPLC) was used to monitor the spatial and temporal distri-bution of dissolved Microcystin-LR and Microcystin-RR in Lake Taihu,and its relationship with physiochemical factors of the lake were also discussed.The results showed that the concentrations of microcystin(MCs) were not different between surface and bottom water in a day,and the highest concentration of microcystins occurred in winter.Concentrations of the MCs changed much during one year in the sampling sites N5 and N1 which located in Zhushan Bay and the western part of Lake Taihu,respectively.General-ly, the concentration of the MC-LR was higher than MC-RR for the year in average while the opposite results appeared in individual month of August and September.Correlation analysis showed that MC-LR was significantly positive correlated with TN,but did not show correlation with TP.During the period of water bloom of cyanobacteria,levels of the MC-LR were significantly positive corre-lated with TP,TN,UV254 ,SS,total organic carbon and biomass of cyanobacteria,whereas MC-RR was not significant correlated with all the environmental factors in the statistical test.
Key words:  Microcystin  Lake Taihu  environmental factors  correlation
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