长江上游宜宾至江津段周丛藻类群落结构及水质评价  

Structure of Periphytic Algal Community and Evaluation of Water Quality in the Section from Yibin to Jiangjin in the Upper Yangtze River

作　　者：李斌斌[1] 李锐 谭巧[1] 吕红健 姚维志[1] LI Bin-bin, LI Rui, TAN Qiao, LV Hong-jian, YAO Wei-zhi(School of Animal Science and Technology~Research Central of Fishery Resources and Environment/ Key Laboratory of Aquatic Science of Chongqing , Southwest University, Chongqing 400716, Chin)

机构地区：[1]西南大学动物科技学院/西南大学渔业资源环境研究中心/水产科学重庆市重点实验室,重庆400716

出　　处：《西南大学学报（自然科学版）》2018年第3期10-17,共8页Journal of Southwest University(Natural Science Edition)

基　　金：美国大自然保护协会(TNC)基金项目(CN/Beijing/swu061713);农业部长江流域渔政监督管理委员会基金项目(Fo4)

摘　　要：2013年11月至2014年6月,在长江上游宜宾至江津段共采到周丛藻类4门31属82种,硅藻门在种类和数量上均占据优势地位.周丛藻类细胞密度和生物量变幅分别为0.13~13.11×10~5个/cm^2和0.03~7.07 mg/cm^2,总平均值分别为4.23×10~5个/cm^2和1.60 mg/cm^2.周丛藻类物种数、细胞密度和生物量均以秋、冬2季最高,夏季最低.从上游到下游,周丛藻类群落结构大体呈现出物种数和多样性指数逐渐减小,而细胞密度和生物量逐渐增加的趋势,水质污染逐渐加重.调查期间周丛藻类的Shannon-Wiener多样性指数、Pielou均匀度指数和Margalef多样性指数的变幅分别为1.57~4.52,0.14~0.50和2.10~3.96.基于周丛藻类多样性指数、污染指数和污染评价值等的水质评价结果大体一致,即长江上游宜宾至江津段水质为β-中污型,且有向α-中污过渡的趋势.From November 2013 to June 2014,periphytic algal composition and distribution were investigated from the Yibin-Jiangjin section in the upper reaches of the Yangtze River.A total of 82 species of periphytic algae belonging to 31 genera and 4 phyla were collected.The phynum of Bacillariophyta was dominant in both algal species and quantities.Cell density and biomass of periphytic algae were in the range of0.13-13.11×10-5 cm-2 and 0.03-7.07 mg/cm-2,averaging 4.23×10-5 cm-2 and 1.60 mg/cm2,respectively.In addition,autumn and winter had higher species richness,greater cell densities and more biomass than summer.From upstream to downstream along the Yangtze River,periphytic algal species richness and biodiversity indices gradually declined,while cell density and biomass gradually increased.The water quality of the sampling sites in upstream was better than in downstream.Shannon-Wiener species diversity index,Pielou index and Margalef species richness index were in the range of 1.57-4.52,0.14-0.50 and2.10-3.96,respectively.The water quality assessments,which were based on biodiversity indices（i.e.Shannon-Wiener,Pielou,Margalef）,indicator organisms quality and Saprobien indices,gave consistent results.The above results indicated that water quality of all the sampling sites belonged toβ-mesosaprobic zone,and it seemed to be transiting toα-mesosaprobic zone during the sampling period.

关 键 词：长江上游 周丛藻类 群落结构 水质评价 

分 类 号：S932.7[农业科学—渔业资源]