上海世博园白莲泾浮游藻类群落结构和物种多样性的研究

The research on community structure and species diversity of planktonic algae in Bailianjing,Shanghai Expo Garden

上海白莲泾生态环境是中国2010年上海世界博览会规划区的重点建设项目。2006年3月至9月对白莲泾的浮游藻类进行了调查，分析了浮游藻类的群落结构、物种多样性以及浮游藻类与水质理化参数的关系。共检出浮游藻类181种，隶属于7门82属，主要优势种为水华微囊藻、铜绿微囊藻、不定微囊藻、湖泊鞘丝藻、巨颤藻、小席藻和扭曲小环藻；浮游藻类密度年平均值为21．03×10^4 ind．／L，生物量年平均值为4．027 mg/L；浮游藻类的香农威尔多样性指数为0．94～2．47，丰富度指数为0．58～2．75，均匀度指数为0．39～0．78；涨潮时生物密度均值为17．60×10^4 ind．／L，生物量均值为0．775 mg/L；落潮时生物密度均值为24．78×10^4 ind．／L，生物量均值为1．569 mg／L。

The ecological environment in Shanghai Bailianjing is the key construction project of planning area of Shanghai World Expo in China in 2010. The community of planktonic algae was investigated in Bailianjing from March to September in 2006. The species diversity and mutual relations of planktonic algae with physicochemical parameters of water were analyzed. The results showed that there were 181 species planktonic algae in Bailianjing which belong to 7 phyla, 82 genera. Dominant species were Microcystic flos-aqua, M. aeruginosa, M. incerta, Lyngbya limnetica, Oscillatoris princes, Phormidium tenue and Cyclotella stelligera. The annum average density of planktonic algae was 21. 034 8 × 10^4 ind./L and the annual average biomass of planktonic algae was 4. 027 mg/L. The value of Shannon-Wiener diversity index, Margalef diversity index andPielou index were 0.94 - 2.47, 0.58 - 2.75 and 0.39 - 0.78 respectively. The average density of planktonic algae was 17.60 × 10^4 ind./L in flood tide and 24.78 × 10^4 ind./L in ebb tide. The average biomass of phytoplankton was 0. 775 mg/L in flood tide and 1. 569 mg/L in ebb tide.