Li Yan-Qing, Huang Ting-Lin, Zhang Hai-Han, Wen Cheng-Cheng, Yang Shang-Ye, Lin Zi-Shen, Gao Xin
Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Huan Jing Ke Xue. 2020 May 8;41(5):2158-2165. doi: 10.13227/j.hjkx.201910147.
To understand the temporal and spatial succession characteristics of algae functional communities and water quality changes in a drinking water reservoir, the Lijiahe Reservoir was selected to monitor variations in water quality and algae from September 2018 to June 2019. The algae community was classified into functional groups following the method proposed by Reynolds and Padisák. The relationship between algal functional community and water quality was discussed, and the water quality was assessed using the water quality index (WQI) method. The results showed that 56 species of algae were obtained, belonging to 4 families and 28 genera, which were divided into 15 functional groups. The dominant algae functional communities were B, D, G, J, L, Mp, P, W, and X. The algae structure of Lijiahe Reservoir showed obvious seasonal characteristics. The algal density in the mixed period was significantly lower than that in the stratification period. The main functional algae in the mixed period were Chlorella and Cyclotella, but Navicula and Synedra were the dominant functional algae in the stratification period. Redundancy analysis showed that the water temperature, mixing depth, and relative water column stability index were the main factors driving algae succession. WQI analysis indicated that the water quality of Lijiahe Reservoir was "good", and the water quality during the mixed period was slightly better than that in the stratification period. This study demonstrates that water-lifting aerators can change the succession characteristics of algae functional groups, and effectively contribute to improvement in water quality in a drinking water reservoir.
为了解饮用水水库中藻类功能群落的时空演替特征及水质变化，选取李家河水库对2018年9月至2019年6月期间的水质和藻类变化进行监测。藻类群落按照雷诺兹和帕迪萨克提出的方法划分为功能组。探讨了藻类功能群落与水质之间的关系，并采用水质指数（WQI）法对水质进行评价。结果表明，共获得56种藻类，隶属于4科28属，分为15个功能组。优势藻类功能群落为B、D、G、J、L、Mp、P、W和X。李家河水库的藻类结构呈现出明显的季节性特征。混合期的藻类密度显著低于分层期。混合期的主要功能藻类为小球藻和小环藻，但分层期的优势功能藻类为舟形藻和针杆藻。冗余分析表明，水温、混合深度和相对水柱稳定指数是驱动藻类演替的主要因素。WQI分析表明，李家河水库水质“良好”，混合期水质略优于分层期。本研究表明，提水曝气器可以改变藻类功能组的演替特征，并有效促进饮用水水库水质的改善。
