泾河宁夏段夏季浮游生物群落结构特征

2010年7-8月对泾河宁夏段浮游生物群落组成进行了调查.结果表明,该河段浮游植物种类有6门、81种(属),密度为1.1万～11.6万个/L,平均密度为4.37万个/L.生物量为0.024 ～0.210 mg/L,平均生物量为0.083 mg/L.浮游动物有4门、54种(属),密度为60 ～ 185个/L,平均密度为107.73个/L.生物量为0.02～0.66 mg/L,平均生物量为0.24 mg/L.浮游植物多样性指数表明,该河段水质良好,浮游生物群落结构不稳定,易受外界的干扰.

Community Structure of Plankton of Jing River in Ningxia in Summer

The plankton community composition were investigated in Jing River of Ningxia section from July to August in 2010.The results showed that: 81 species (genera), 6 phylum of phytoplankton were observed in the whole paragraph. The density of phytoplankton was 1.1 × 104 ~ 11.6 × 104 cells•L-1; the average density was 4.37 × 104 cells•L-1; the range of biomass was 0.024 ~ 0.21 mg•L-1, the average biomass was 0.057 mg•L-1. At the same time, 54 species(genera),4 phylum of zooplankton were observed, the density was 60 ~ -185 ind•L-1;the average density was 107.73 ind•L-1; the range of Biomass was 0.02~ 0.662 mg•L-1, an average was 0.24 mg•L-1; the comprehensive index of plankton in Jing River showed that: In Jing River , the water quality was good; the composition and structure of community was instability, so, the plankton community composition was interferences by external environment susceptibility.