Study on Water Environmental Benefit of Main Hydrophyte Communities in Hongze River
Hongze wetland is typical lake wetland of our country,which has abundant hydrophytes resource.These hy-drophytes had effect on the water of Hongze river reciprocally to give different water environmental benefit when they lived,because of their different growth behaviors.In the paper,the main hydrophyte communities in Hongze river were chosen to test TN,TP,COD and other index.Factor analysis and the trophic status index evaluation method were used to study the water quality status of every community.In the end the different environmental benefits of different hydrophyte communities were found,in which the curly pondweed community and reed community had better water environmental benefits,but the black rush community and alligator weed community had the worse water environmental benefits.