野外模拟扰动对太湖微囊藻群体大小的影响  

Effects of in-situ simulative mixing on colony size of Micrcocystis in Lake Taihu

作　　者：杨桂军[1] 钟春妮[2] 秦伯强[2] 王玉兵[1] 王晓平[1] 

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,南京210008

出　　处：《湖泊科学》2017年第2期363-368,共6页Journal of Lake Sciences

基　　金：国家自然科学基金重点项目(41230744;40825004);国家水体污染控制与治理科技重大专项(2012ZX07503-002)联合资助

摘　　要：风浪扰动是影响湖泊生态系统重要的环境因素之一.为了解风浪扰动对湖泊微囊藻群体大小的影响,在野外模拟了风浪扰动对太湖微囊藻群体大小的影响.结果表明,实验组模拟风浪连续扰动24 h,扰动结束时实验组和对照组微囊藻群体大小分别为68.38和12.56μm,实验组和对照组微囊藻群体大小呈极显著差异;扰动结束时实验组和对照组微囊藻胞外多糖含量分别为1.49×10~^(-6)和1.26×10^(-6)mg/cell,二者差异显著.表明适当强度的风浪扰动短时间内能促使微囊藻群体显著增大,有助于人们对太湖微囊藻水华暴发机理的认识.Mixing induced by wind-wave is one of the important factors in lake ecosystems; To understand the effects of mixing in- duced by wind-wave on colony size of Microcystis in lake, an in-situ experiment was conducted in Lake Taihu. The results showed that the colony size of Microcystis in treatments with wind wave for 24 h and in control was 68.38 and 12.56 μm, respectively. There was a significantly difference between them. The extracellular polysaccharides concentration of Microcystis in treatment with mixing continuing for 24 h was 1.49× 10^-6 mg/cell, which was significant higher than that in control （ 1.26×10^-6 mg/eell）. The re- suits suggested that appropriate intensity of mixing induced by wind-wave can significantly enlarge the colony size of Microcystis in a short time. It will helpful to understand the mechanism of the Microcystis blooms in Lake Taihu.

关 键 词：扰动 微囊藻 群体大小 太湖 模拟 

分 类 号：X173[环境科学与工程—环境科学] X524