大辽河水系夏季浮游植物群落结构特征及水质评价  

Phytoplankton community structure and water quality of Daliaohe river system in summer

作　　者：李芳芳[1] 董芳[1] 段梦[1] 王珂[1] 朱琳[1] 

机构地区：[1]南开大学环境科学与工程学院,污染过程与环境基准教育部重点实验室/天津市城市生态环境修复与污染防治重点实验室,天津300071

出　　处：《生态学杂志》2011年第11期2489-2496,共8页Chinese Journal of Ecology

基　　金：国家重大科技水专项(2008ZX07526-003)资助

摘　　要：作为建立中国水环境生态学基准的基础性工作,于2010年7月,按照相关规范的要求,对大辽河水系浮游植物群落结构和水质状况进行了调查。结果表明:调查期间大辽河水系共检出5门124种或变种,其中以绿藻和硅藻为主,分别占43.55%和31.45%;总细胞密度在2.05×105～1.46×107个·L-1,平均6.35×106个·L-1,绿藻和硅藻占优势;主要优势种是硅藻的颗粒直链藻极狭变种(Melosira granulata var.angustissima);共检出污染指示种44种,其中β-中污带指示种居多,有36种,占所有指示种的81.81%;Shannon多样性指数为1.43～2.68,Margalef指数为1.00～1.78,Pielou均匀度指数为0.52～0.83;综合水体中浮游植物的密度、优势种类、指示种、生物多样性指数评价表明,大辽河水系处于富营养化状态、中等程度污染水平。As a basic work for establishing China water environment ecological criteria, an investigation was conducted on the phytoplankton community structure and water quality in Daliaohe river system in July 2010, based on relevant guidelines. A total of 124 phytoplankton species were recorded, most of which belonged to Chlorophyta and Baeillariophyta, occupying 43.55% and 31.45% of the total, respectively. The total cell density at different sampling sites varied from 2.05×105 to 1.46×10y ind . L-1, with an average of 6.35×106 ind . L-1 and dominated by Chlorophyta and Bacillariophyta. At all sites, Melosira granulata vat. angustissim of Bacillariophyta was the dominant species. Forty-four indicator species of water pollution were detected, and most of them were of 13-mesosaprobic, with 36 species and occupying 81.81% of the total. The Shannon index of the phytoplankton community was 1.43-2.68, Margalef index was 1.00- 1.78, and the Pielou index was 0.52-0.83. Based on this investigation, it was considered that the Daliaohe fiver system was in eutrophic state and at moderate pollution level.

关 键 词：大辽河水系 浮游植物 群落结构 水质评价 

分 类 号：X824[环境科学与工程—环境工程]