人工湿地组合工艺对水体中浮游动物群落结构的影响

研究了在不同水力负荷条件下［0.6 m³·(m²·d)^-1,0.8 m³·(m²·d)^-1,1.0 m³·(m²·d)^-1］,人工湿地组合工艺系统对浮游动物群落结构的影响和在相同的水力负荷下,人工湿地组合工艺系统对浮游动物群落结构影响的季节性变化.结果表明,在水力冲击负荷为0.8 m³·(m²·d)^-1时对浮游动物群落结构的影响相对较大;春、夏、秋季的作用强于冬季,而秋季对浮游动物群落结构的影响最大;对大型浮游动物的影响大（去除率≥70％）,对小型浮游动物的影响相对小一些,湿地出水中出现了一些进水中没有的种类;稳定塘的存在对浮游动物的群落结构变化起到了缓解作用,组合工艺（下行流湿地→兼性塘）的作用效果较弱;下行流→上行流湿地→推流床湿地和下行流湿地→推流床湿地的作用效果较强,对浮游动物的影响较大.

Effect of Different Combination System of Constructed Wetland on Zooplankton Community Structure

The effect of the different combination system of constructed wetland on zooplankton community structure was studied with different hydraulic loading 0.6 m3 x (m2 x d)(-1), 0.8 m3 x (m2 x d)(-1), 1.0 m3 x (m2 x d)(-1]. And the seasonal change of the effect was measured with the same hydraulic loading. The results show that different combination system with hydraulic loading 0.8 m3 x (m2 x d)(-1) on zooplankton community structure is more effective than others; the effect in spring, summer and autumn are more notable than in winter, otherwise the effect in autumn is the most notable; the effect on macro-zooplankton is more obvious than on micro-zooplankton and there are some species in the effluent water of wetland but not in influent water. Ponds of the systems weaken the effects on zooplankton community structure and the effect of combination system (down-flow --> aerobic and anaerobic pond) is the worst of all combination system, and in contrast to others down-flow --> up-flow --> horizontal-flow wetland and down-flow --> horizontal-flow wetland present distinct effects on zooplankton.