Research on Floating Algae Community and Water Quality Assessment in the Main Stream of the Fu River

ZHANG Jie1,2,JI Yong1,MA Xia3,ZHANG Xiao-bing1(1.College of Hydrodynamic and Ecology Engineering,Nanchang Institute of Technology,Nanchang 330099,China;2.College of Environmental Sciences and Engineering,Hohai University,Nanjing 210098,China;3.Administration Bureau of Xiajiang Water Control Project,Jiangxi Provincial,Nanchang 330046,China)

the main stream of Fu river;floating algae;biological diversity;water quality assessment

The community structure of floating algae and water quality in 8 sampling spots of the Fuhe river were investigated.Results showed that the level of chemical oxygen demand(COD),and total nitrogen(TN) were generally high.The maximum of conventional pollution indicators was found in the downstream monitoring sections,and the minimum value was shown in the upper monitoring sections.Gaoping was the most serious pollution monitoring section in Fu river.There were 73 species of floating algae,belonging to 39 genera,among which,Cholorophyta,Cyanophyta and Bacillariophyta were major phylum,with 30,13,and 19 genera respectively.There were 11 dominant species pertaining to indicator species of oligosaprobic zone and β-mesosaprobic type.The analysis results with Margalef diversity index and Shannon-Wiener biodiversity index indicated that the water quality in middle and lower reaches of Fu river was in the moderate pollution status,which coincided with the conclusion of the dominant algae instructions.