怀洪新河浮游动物群落特征与水环境因子的关系研究

为研究怀洪新河太湖新银鱼国家级水产种质资源保护区(以下简称保护区)水域浮游动物的群落结构及其与水环境因子的关系,于2014年6月(夏季)在怀洪新河进行采样分析,并对调查区域内的浮游动物及主要环境因子进行了主成分分析(PCA)和典范对应分析(CCA)。结果表明,保护区河段属中营养型河流;保护区浮游动物有4门24属33种,其中轮虫类最多,为11种(占33.33%),其次为原生动物和桡足类,均为8种(占24.24%),最少的为枝角类6种(占18.18%);保护区浮游动物细胞密度平均为1.82×10~4ind./L,生物量平均为2.45mg/L;水温和氨氮是影响水体环境的关键因子;水温、总氮、浊度、氨氮、高锰酸盐指数(COD_(Mn))和pH是影响浮游动物群落结构的主要驱动因子。

Study of the Relation between Zooplankton Community Structure and Aquatic Environment Factors in Huaihong River

In order to investigate the relationship between zooplankton community structure and aquatic environmental factors in the National Aquatic Germplasm Resources Protection Area of Neosalanxtaihuensis in Huaihong River, water samples were collected and analyzed in June, 2014 and principal component analysis (PCA) and canonical correspondence analysis (CCA) methods were used to assess the relationship. The results indicated that Huaihong River was identified as a nutritional river. There were 4 phylum, 24 genera and 33 species of zooplankton totally found in this investigation, in which 11 species of rotifers (accounting for 33.33%) were predominant, followed by 8 species of protozoans andcopepods (accounting for 24.24%) and 6 species of cladocerans (accounting for 418.18%). Furthermore, the average cell density of zooplankton in each sampling site was 1.82×10ind./L, the average biomass was 2.45 mg/L. Water temperature and ammonia nitrogen (NH3-N ) were the main factors of the aquatic environment. Water temperature, TN, turbidity, NH3-N , CODMn and pH were the major driving factors influencing the zooplankton community structure.