【摘要】 对永定河水系官厅水库黑土洼人工湿地系统的生物多样性、水质变化及其相关性进行了研究。在该系统中共检出浮游藻类8门、94种,平均密度为980.93×104cells/L,与TP呈线性正相关。群落中绿藻(Chlorophyta)占36.8%,硅藻(Bacillario-phyta)占31.0%,蓝藻(Cyanophyta)占23.4%。密度去除率为72.7%;水生维管束植物有7科、13种,分别构成不同的挺水或沉水植物群落;浮游动物群落由原生动物(Protozoa)、轮虫类(Rotifera)、枝角类(Cladocera)、桡足类(Copepoda)构成,共检出70种。平均密度为4883ind./L。以原生动物和轮虫为主,呈现出小型化、物种多样性低的特点。密度去除率为81.9%,与浮游藻类呈二次曲线相关;底栖动物群落由寡毛类(Olisochaeta)、水生昆虫(Uniramia)、甲壳类(Crustacea)和软体动物(Mollusca)构成,共检出15种。平均密度为5670ind./m2(水生昆虫占62.3%),密度去除率为92.4%。黑土洼湿地系统通过物理、化学和生物的协同作用,对永定河水中的污染物有显著的净化作用,主要表现为对CODMn、BOD5、TN、NH4-N、NO3-N、TP、PO4-P和SS的去除率为52.9%~99.1%。TP与BOD5呈线性正相关。更多还原

【Abstract】 This research was carried on in Hei Tu Wa of Guan-Ting Reservoir in Yongding River upstream From 2004 to 2005.The phytoplankon communit was composed of 8 divisions(94 species,including genus and varieties)and the average cell density was 980.93×104 cells per liter.The dominant divisions were Chlorophyta(36.8%),Bacillariophyta(31.0%)and Cyanophyta(23.4%).The removal efficiency of phytoplankton density was 72.7%.There was a positive linear correlation between phytoplankon density and total phosphorous.Here,7 families(13 species)of aquatic vasular plants were found and constituted emerging and submersed macrophyte communities.In the wetland system,the zooplankton community consisted of Protozoa,Rotifera,Cladocera and Copepoda(70 species).Their average density was 4883 individual per liter.Protozoan and Rotifera were the dominant groups and the removal efficiency of their density was 81.9 %.The correlation between zooplankton and phytoplankton presented quadratic curve.Also,the zoobenthos community contained Olisochaeta,Uniramia,Crustacea and Mollusca(15 species).Their average density was 5670 individual per m2(62.3% was Uniramia)and the removal efficiency of their density was 92.4 %.The constructed wetland system reduced CODMn,BOD5,TN,NH3-N,NO3-N,TP,PO4-P and SS in the water of Yong Ding River at 52.9%-99.1%.更多还原