抚河干流浮游藻类群落调查及水质评价

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

对抚河干流8个监测断面的水质情况及浮游藻类群落结构特征进行了调查分析。结果表明,化学需氧量(COD)、总氮(TN)的水平较高,常规污染指标呈现上游较小、下游增大的特点,污染最重的是高坪点。抚河干流浮游藻类共计39属73种,种类较多的为绿藻门、蓝藻门和硅藻门,分别鉴定出30种、13种和19种。优势种主要有栅藻、针杆藻、颤藻等,均为寡污带和β-中污指示种。Margalef指数与Shannon-Wiener指数计算结果表明抚河中下游水质总体处于中度污染状态,与藻类优势种指示结论相符。

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.