长江流域资源与环境 >> 2010, Vol. 19 >> Issue (06): 692-.

• 湖泊资源与环境保护 • 上一篇    下一篇

滇池福保湾底栖硅藻的时空分布

裴国凤1| 阎春兰1| 王海英1*| 刘国祥2   

  1. (1.中南民族大学微生物与生物转化实验室| 湖北 武汉 430074; 2.中国科学院水生生物研究所| 湖北 武汉 430072)
  • 出版日期:2010-06-20

SPATIAL AND TEMPORAL DISTRIBUTION OF BENTHIC DIATOMS IN FUBAO BAY|DIANCHI LAKE

PEI Guofeng1| YAN Chunlan1| WANG Haiying1| LIU Guoxiang2   

  1. (1.Laboratory of Microorganism and Biotransformation| SouthCentral University for Nationalities| Wuhan 430074| China; 
    2.Institute of Hydrobiology| Chinese Academy of Sciences| Wuhan 430072| China)〖
  • Online:2010-06-20

摘要:

为了揭示入湖河流的污染负荷对滇池福保湾沿岸带底栖硅藻群落的影响,在不同季节采集研究了该湖湾6个样点的底栖硅藻样品,分析其群落结构的物种组成、细胞密度和多样性指数等。研究发现:东部沿岸区在调查期间的大多数月份是极小曲壳藻(Achnanthes minutissima)占绝对或主要优势,其相对丰富度最高可达79.5%;在1~7月份,西部沿岸区的优势种类主要是异极藻属(Gomphonema〖WTBZ〗 spp.),污染最为严重的河口区是耐污性的具柄双眉藻〖WTBX〗(Amphora pediculus)和两栖菱形藻(Nitzschia amphibia)占优势,而在调查的中后期,极小曲壳藻逐渐发展为这两区的优势种类。同时发现底栖硅藻密度随着与河口间距离的增加而逐渐升高。以上结果表明入湖河流的污染负荷对受纳湖湾底栖硅藻的密度和时空变化有较大影响。

Abstract:

In order to reveal the effect of the pollutants in the river which flowed into the Fubao Bay,Dianchi Lake on benthic diatom communities,benthic diatom samples of 6 sites in the littoral zone of Fubao Bay were collected in different season,and the diatom community structure including diatoms species composition,cell densities and ShannonWeaver diversity index was investigated.The study found that 〖WTBX〗Achnanthes minutissima〖WTBZ〗 was one of the most abundant species or dominant indicator in the most months during experiment in the east littoral,and the highest relative abundance reached 795%.The 〖WTBX〗Gomphonema〖WTBZ〗 spp.were dominant in the west littoral,and 〖WTBX〗Amphora pediculus〖WTBZ〗 and 〖WTBX〗Nitzschia amphibia〖WTBZ〗 were dominant species in the highly polluted region near the estuary of the bay during January~July,after that,〖WTBX〗Achnanthes minutissima〖WTBZ〗 became gradually the dominator in both water area.The densities of benthic diatoms rose gradually with the increase of the distances between the sampling sites and the estuary.The results showed that the pollutants in the river which flowed into the lake influenced greatly the density and spatialtemporal distribution of benthic diatoms in the lake bay.〖  

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