汾河太原段浮游藻类群落结构特征及水质分析

对汾河流域太原段6个样点的浮游藻类群落结构特征及水质情况进行了调查分析。结果表明:①汾河太原段化学需氧量(COD)、总磷和氨氮的水平较高,重金属镉、铬和铅污染都比较严重,其中镉污染尤其突出,水质处于从V类水向劣V类水过渡阶段;②汾河太原段浮游藻类共计有89属,224种,其中蓝藻门23属103种,绿藻门37属75种,硅藻门19属36种,甲藻门4属4种,隐藻门3属3种,裸藻门、金藻门和黄藻门各1属1种。优势种主要有小席藻、银灰平裂藻、尖针杆藻等14种,均为α-中污和β-中污指示种;③汾河太原段物种多样性指数和物种丰富度指数从上游到下游逐渐降低,水质污染情况逐渐加剧,处于中度污染状态,个别地段达到重污染,其中尤以小店桥断面污染状况最严重。鉴于汾河太原段目前的状况,提出了相关污染防治措施,为预防和综合治理汾河流域水体污染提供了科学依据。

Community Structure and Water Quality Analysis of Planktonic Algae in the Taiyuan Segment of the Fenhe River

The community structure of Phytoplankton and water quality on 6 sampling spots of the Taiyuan segment of the Fenhe River were investigated in this study. Results showed that the level of chemical oxygen demand (COD), and the total phosphorus and ammonia nitrogen were generally high. The total phosphorus and ammonia nitrogen were at a higher level throughout the year in the study river, with suggesting the maximum values of 8.21 mg/L and 8.981 mg/L in winter, respectively. The heavy metals pollution of cadmi...