汉江汉中段浮游植物群落结构与水质评价  

Community structure of phytoplankton and water quality assessment in Hanzhong section of Hanjiang river

作　　者：刘智峰[1] 郑立柱[1] 李鹏[1] 

机构地区：[1]陕西理工学院化学与环境科学学院,陕西汉中723001

出　　处：《广东农业科学》2011年第3期151-153,共3页Guangdong Agricultural Sciences

基　　金：陕西省自然科学基础研究计划项目(2010JM7016);陕西省"13115"科技创新工程(2010ZDGC-23);陕西理工学院引进人才科研启动项目(SLGQD0710)

摘　　要：2009年4~6月,用活体观察法和直接计数法对汉江汉中段水体浮游植物进行研究,共鉴定出浮游植物5门25属44种（包括2个未定名种）,其中硅藻种类数最多,其次是绿藻、裸藻、甲藻,蓝藻最少。优势种为意大利直链藻（Melosira italica）,克洛脆杆藻（Fragilaria crotomensis）,尖针杆藻（Synedra acus）,简单舟形藻（Navicula simplex）,放射舟形藻（Navicula radiosa）,小球衣藻（Chamydomonas microsphaera）,环丝藻（Ulothrix zonata）,刺鱼状裸藻（Euglena gasterosteus）。浮游植物平均个体密度为8.74×105 Ind/L。从浮游植物各类群数量来看,硅藻门（Diatoms）数量最多,绿藻门（Chlorophyta）次之,甲藻门（Dinoflagellate）最少。运用污染指示种、污染指示群落和多样性指数对汉江汉中段水质进行评价,结果表明该水体水质为β-中污型。The study on phytoplankton was carried out in Hanzhong section of Hanjiang river during April to June,2009.The results of live observation and direct counting method showed that a total of 44 species including 2 unnamed species were identified,belonging to 5 orders and 25 genera.Diatoms was the dominant group,Chlorophyta,Euglena,dinoflagellate were subdominant groups,while Cyanophyta was the least.Dominant species were Melosira italica,Fragilaria crotomensis,Synedra acus,Navicula simplex,Navicula radiosa,Chamydomonas microsphaera,Ulothrix zonata and Euglena gasterosteus.The mean density of cells calculated from the test results was 8.74 × 105 Ind/L.The respect of cell density,Diatoms counts the most,with Chlorophyta coming the second.Dinoflagellate had the least cell density.Water quality was assessed using saprobie indicator,saprobie indication community and species diversity.The results showed that this area belongs to β-mesosaprobic zone.

关 键 词：汉江汉中段 浮游植物 群落结构 水质评价 

分 类 号：X826[环境科学与工程—环境工程]