大型溞强化生物操纵修复富营养化水体研究  

Study on the Remediation of Eutrophic Water by Enhanced Biomanipulation of Daphnia magna

作　　者：刘煌 曹琳 许国静 王图锦[2] LIU Huang;CAO Lin;XU Guojing;WANG Tujin(China Merchants Ecological Environment Protection Technology Co.Ltd,Chongqing 400067,China;School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]招商局生态环保科技有限公司,重庆400067 [2]重庆交通大学河海学院,重庆400074

出　　处：《环境科学与技术》2020年第2期156-161,共6页Environmental Science & Technology

基　　金：重庆市技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0169);重庆市技术创新与应用示范项目(社会民生类一般项目cstc2018jscxmsybX0307)。

摘　　要：为了探究大型溞对生物操纵技术修复富营养化水体的影响,文章通过大型溞投放实验,分析大型溞影响下富营养化水体水质变化特征。结果表明:大型溞投放后能够迅速增殖成为优势种,并引发水质的显著改善。水体透明度显著提高,达到最大水深2 m。Chl-a、TP、SRP、TN、NH4+-N和高锰酸盐指数分别下降95%、92%、82%、56%、61%和69%。藻细胞密度较实验前降低了83%,表明大型溞能有效控制水体中浮游植物的生长。同时浮游植物的群落结构也发生较大变化,蓝藻比例大幅度降低,藻类多样性得到提高。水体富营养化程度从重度富营养化降低至中营养水平,水体富营养化状态得以消除。In order to explore the effect of Daphnia magna on the ecological restoration of eutrophic water via biomanipulation,an enhanced biomanipulation experiment with Daphnia magna was conducted in eutrophic water,and the characteristics of water quality were analyzed throughout the experiment.The results showed that Daphnia magna could rapidly proliferate into dominant species and lead to significant improvement of water quality.The transparency of water body was significantly improved,reaching a maximum depth of 2 m.The concentration of Chl-a,TP,SRP,TN,NH4+-N and CODMndecreased by95%,92%,82%,56%,61%and 69%,respectively.The algal density decreased by 83%compared with that before the experiment,which indicated that Daphnia magna could effectively control the growth of phytoplankton.The community structure of phytoplankton also changed a lot compared with the control group,the proportion of cyanobacteria decreased significantly,and the diversity of algae increased.The eutrophication level of water decreased from hyper eutropher to mesotropher,and the eutrophication state was eliminated.

关 键 词：富营养化 大型溞 浮游植物 浮游动物 生物操纵 

分 类 号：X52[环境科学与工程—环境工程]