猪场废水资源化处理系统中枝角类群落结构的周年动态

Annual dynamics of cladocera community structure in swine wastewater recycling system

于2012年6月—2013年5月对上海市农业科学院内猪场废水资源化处理系统中枝角类群落结构的组成和现存量的周年变化及其主要影响因子进行了研究。结果表明:共鉴定出枝角类22种,隶属5科10属,优势种7种,主要为蚤状溞(Daphnia pulex)、多刺裸腹溞(Moina macrocopa)和角突网纹溞(Ceriodaphnia cornuta);枝角类年均生物密度和生物量分别为135.02 ind·L-1和11.14 mg·L-1;密度和生物量的最高峰分别出现在6月和4月,最低值分别出现在1月和7月。枝角类的Shannon指数、Pielou指数和Margalef指数均呈现秋冬季高、夏春季低的规律。枝角类的种群特征指数和环境因子的Pearson相关性分析表明,p H、溶解氧、总氮、总磷和氨氮是影响该系统枝角类群落结构变化的主要环境因子。

From June 2012 to May 2013, a monthly investigation was conducted to understandthe annual variation of cladocera community structure （ including species composition and stand-ing crop） and related main affecting factors in the swine wastewater recycling system of ShanghaiAgricultural Academy of Sciences. The results showed that a total of 22 species in 10 genera of 5families were identified through the year. There were 7 dominant species, including Daphniapulex, Moina macrocopa, and Ceriodaphnia cornuta. The mean annual density and biomass of thecladocera were 135.02 ind · L-1 and 11.14 mg · L-1, with peaking values in June and April andminimum values in January and July, respectively. The Shannon index, Pielou index, and Mar-galef index were higher in autumn and winter than in summer and spring. The Pearson correlationanalysis showed that pH, dissolved oxygen, total nitrogen, total phosphorus and ammonia nitro-gen were the main factors affecting the community structure of cladocera in the system.