碧流河水库及其流域河流浮游动物的群落结构研究

Study on the community structure of zooplankton in Biliuhe Reservoir and basin

为评价碧流河水库污染状况和推进水资源可持续利用,于2014年8月至2015年5月按季度采样,研究了碧流河水库及其流域河流内水体理化因子、浮游动物种类组成、密度、生物量、物种多样性,并对结果使用典范对应分析(CCA)来解释它们之间的相关性。结果表明,碧流河水库及其流域内共鉴定出浮游动物4类131属265种,水库库区内浮游动物平均密度为282.65 ind/L,平均生物量为0.17 mg/L;流域河流内浮游动物平均密度为125.06ind/L,平均生物量为0.03 mg/L。CCA分析表明,浮游动物均匀度指数(z J)与溶氧(DO)、透明度(SD)和藻类的密度(pd)具有较大的相关性。浮游动物密度(zd)、生物量(zb)和多样性指数(zh)与水体中藻类的密度(pd)、香农-维纳指数(pH')、均匀性指数(p J)及硝酸盐含量呈正相关,与温度、pH值、亚硝酸盐呈负相关。

To evaluate Biliuhe Reservoir pollution condition and provide scientific guidance for the future development,physicochemical factors,abundance,biomass,species composition and biodiversity of zooplankton in Biliuhe Reservoir and basin were studied from August 2014 to May 2015.And the relationships of above all were analyzed by means of CCA methods.The results showed that there were 265 species of zooplankton,divided into four categories,including 131 genera in Biliuhe Reservoir and basin.The average density of zooplankton in the reservoir was 282.65 ind/L,and the average biomass was 0.17 mg/L.The average density of zooplankton in the river basin was 125.06 ind/L,and the average biomass was 0.03 mg/L.The result of CCA indicated that the Pielou evenness index of zooplankton had correlation with dissolved oxygen,transparency and density of phytoplankton.Density,biomass and diversity index of zooplankton had significant positive correlation with NO-3-N,density,diversity index,Pielou evenness index of phytoplankton,and negative correlation with water temperature,pH and NO-2-N.