淮河流域淮安段着生藻类群落结构特征分析

于2021年5月对淮安境内淮河主要干支流8个点位的水质状况和着生藻类群落结构采样调查，应用3种多样性指数模型评价区域水生态健康状况，并探究影响着生藻类多样性的因素。结果表明：采样期间淮河流域淮安市域共检出着生藻类3门23科32属（种），由硅藻门、蓝藻门和绿藻门组成，硅藻门占绝对优势；多样性指数计算结果显示，流域水生态状况良好，整体表现为清洁-轻污型水体，淮河上游水质稍差于其他水域；结合水质监测数据与卫星遥感影像分析，认为生境状况是影响着生藻类群落分布的主要因素。

Structural Characteristics of Periphytic Algae Community in Huaian Section of Huaihe River Basin

The water quality and community structure of periphytic algae in 8 sites in the mainstream and tributaries of Huaihe River were investigated in May 2021. Three diversity index models were adopted to access the regional water ecological health and explore the factors affecting the diversity of periphytic algae. The results showed that there were 32 genera (species) of 23 families in 3 phyla of algae detected in Huaian section of Huaihe River basin during the sampling period, composed of Bacillatiophyta, Cyanophyta and Chlorophyta, and Bacillatiophyta was dominated. Calculated results of diversity index indicated that the overall water ecological status of the basin was good, which was clean-light pollution type. The water quality in the upper reaches of Huaihe River was slightly worse than that of other waters. Based on the water quality monitoring data and satellite remote sensing images, it was concluded that habitat conditions were the main factors affecting the distribution of periphytic algae communities.