台风对太湖微囊藻群体大小的影响  

Effect of typhoon on the size of Microcystis colonies in Lake Taihu

作　　者：王玉兵[1] 杨桂军[1] 秦伯强[2] 王晓平[1] 吴挺峰[2] 

机构地区：[1]江南大学环境与土木工程学院,无锡214122 [2]中国科学院南京地理与湖泊研究所湖泊环境与科学国家重点实验室,南京210008

出　　处：《环境工程学报》2016年第7期3961-3966,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07503-002);国家自然科学基金资助项目(41101053;41230744)

摘　　要：为了解台风对太湖微囊藻群体大小及在水体中分布的影响,于2013年7月12—16日台风苏力经过太湖期间,测定并分析了风速、总氮、总磷、微囊藻群体大小和Chl-a浓度变化。结果表明,台风过程中水体中总氮和总磷浓度分别从1.33 mg·L^(-1)和0.07 mg·L^(-1)提高到2.70 mg·L^(-1)和0.23 mg·L^(-1),48 h内微囊藻群体平均大小从32.80μm增加到69.43μm。此外,水体中Chl-a浓度与风速显著正相关(r=0.472,P<0.01),即风速越大,Chl-a浓度越高,14日22:10达到最大值(13.30μg·L^(-1))。研究表明,强风浪扰动(如台风)能够引起水体中氮磷浓度的提高,改变微囊藻在水体中的分布,并且能够促进微囊藻群体的迅速增大。To understand the effects of typhoons on the size and distribution of Microcystis colonies in Lake Taihu,we measured and analyzed the wind speed,total nitrogen,total phosphorous,Microcystis colony size,and Chl-a concentration when Typhoon Soulik moved across Lake Taihu from July 12,2013 to July 16,2013. The concentration of total nitrogen and phosphorous during the typhoon increased from 1. 33 mg·L^（-1）and 0. 07 mg·L^（-1）to 2. 70 mg·L^（-1）and 0. 23 mg·L^（-1）,respectively,and the size of the Microcystis colony increased from 32. 80μm to 69. 43 μm in 48 h. Additionally,the concentration of Chl-a in the water was significantly positively correlated with wind speed（ r = 0. 472,P〈 0. 01）. The concentration of Chl-a increased with the wind speed. The concentration of Chl-a had a maximum value at 22： 10 on July 14（ 13. 30 μg ·L^（-1））. These results suggested that disturbances induced by strong winds or waves（ such as typhoons） increase the concentrations of total nitrogen and phosphorous,changed the distribution of Microcystis in the water,and promoted a rapid increase in size of Microcystis colonies.

关 键 词：台风 扰动 太湖 微囊藻 群体大小 

分 类 号：X524[环境科学与工程—环境工程]