滇池北部湖湾不同底泥性状对微囊藻复苏影响的模拟-湖泊科学.PDF

J. Lake Sci.(湖泊科学), 2009, 21(6): 806-812 . E-mail: jlakes@ ©2009 by Journal of Lake Sciences 滇池北部湖湾不同底泥性状对微囊藻复苏影响的模拟* 1,2 1,2 1 1 1**1 万 能 , 汤 俊 , 李 林 , 郑凌凌 , 宋立荣 (1: 中国科学院水生生物研究所淡水生态及生物技术国家重点实验室, 武汉 430072) (2: 常熟理工学院生物与食品工程学院, 常熟 215500) 摘 要: 滇池北部福保湾主要承接上游昆明市的生活污水及周边工业污水, 其污染程度极为严重. 本研究在福保湖湾内设置 4 个采样点, 分别采集了不同区域的沉积物, 首次模拟研究了微囊藻(Microcystis)在不同沉积物环境中复苏能力差异, 结果表 明微囊藻在模拟实验中的复苏能力表现出对不同底质的不同适应性, 入口湖区的沉积物对微囊藻的复苏有极强的抑制作用. 藻类复苏后达到的最大生物量(以叶绿素a 计)分别为东岸对照区的4.7%, 西岸对照区的6.6%及吹填区的 11.9%, 其中微囊藻 生物量也远低于其它各样点, 占东岸对照、吹填区及西岸对照的比例分别为5.2%、10.3%和 19.4%. 以上研究暗示了河口处沉 积物不适合微囊藻的复苏. 福保湾藻类水华的种源贡献应该主要依靠外源性输入, 即湖流场和风向所导致的藻类水平迁移贡 献远远大于底泥复苏至水体的垂直迁移. 关键词: 福保湾; 滇池; 沉积物; 微囊藻; 复苏率; 模拟研究; 外源性输入 Simulation on the sediments affecting Microcystis recruitment in north bay of Lake Dianchi WAN Neng1,2 1,2 1 1 1 , TANG Jun , LI Lin , ZHENG Lingling SONG Lirong (1: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology , Chinese Academy of Sciences, Wuhan 430072, P.R.China) (2: School of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, P.R.China) Abstract : Fubao Bay is located in the north of Lake Dianchi, which is one of the most seriously polluted bays in the lake. Two main rivers, Haihe River and Daqinghe River flow into Fubao Bay from the north. Four sampling sites were settled in this bay, and the sediment samples were collected by using Petersen grab. For the first time, the study of recruitment ability of Microcystis in different sediment environments was carried out in simulation devices. The results in the present study showed that the recruitment ability of Microcystis was quite different depended on its