CAJ | 학술논문

为了解渭河流域最大支流———泾河水系的浮游动物群落结构特征及水质状况,于2012年10月对该水系15个采样断面的浮游动物群落和水环境理化特征进行了调查,并运用Canoco 4.5软件对浮游动物群落与环境因子进行典范对应分析。结果表明：泾河水系浮游动物种类共有28属42种,其中轮虫占主导,原生动物和桡足类次之,分别占种类总数的85.72%、7.14%和7.14%；游动物密度为0.9~36.0 ind./L,平均值为8.5 ind./L,生物量为0.0011~0.0425 mg/L,平均值为0.0097 mg/L；浮游动物优势种有8种；Shannon-Weiner多样性指数(H)平均值为2.38, Pielou均匀度指数(J)平均值为0.75；浮游动物密度聚类分析结果显示,泾河水系各断面浮游动物可分为4大类群；典范对应分析( CCA)结果显示,驱动泾河水系浮游动物群落结构形成的水环境因子为水温、海拔和河宽。基于浮游动物群落结构特征,根据物种多样性指数对泾河水系水质状况进行评价,结果显示,泾河水系水质属于β-中污染,浮游动物群落结构趋于简单化,需要加强流域生态建设及污染治理。
위료해위하류역최대지류———경하수계적부유동물군락결구특정급수질상황,우2012년10월대해수계15개채양단면적부유동물군락화수배경이화특정진행료조사,병운용Canoco 4.5연건대부유동물군락여배경인자진행전범대응분석。결과표명：경하수계부유동물충류공유28속42충,기중륜충점주도,원생동물화뇨족류차지,분별점충류총수적85.72%、7.14%화7.14%；유동물밀도위0.9~36.0 ind./L,평균치위8.5 ind./L,생물량위0.0011~0.0425 mg/L,평균치위0.0097 mg/L；부유동물우세충유8충；Shannon-Weiner다양성지수(H)평균치위2.38, Pielou균균도지수(J)평균치위0.75；부유동물밀도취류분석결과현시,경하수계각단면부유동물가분위4대류군；전범대응분석( CCA)결과현시,구동경하수계부유동물군락결구형성적수배경인자위수온、해발화하관。기우부유동물군락결구특정,근거물충다양성지수대경하수계수질상황진행평개,결과현시,경하수계수질속우β-중오염,부유동물군락결구추우간단화,수요가강류역생태건설급오염치리。
The community structure of zooplankton and characteristics of environment were investigated in 15 sam-pling sites in the Jinghe River system, as the largest tributary of the Weihe River basin, Northwest China, in au-tumn of 2012, and analyzed by canonical correspondence analysis using Canoco 4. 5 software. It was found that there were 42 zooplankton species belonging to 28 genera, with dominant rotifers accounting for 85. 72% in the spe-cies composition, followed by protozoa (7. 14%) and copepod (7. 14%). The zooplankton had a density of 0. 9-36. 0 ind. /L, with an average of 8. 5 ind. /L, and biomass of 0. 001 1-0. 042 5 mg/L, with an average biomass of 0. 009 7 mg/L. There were eight dominant species of zooplankton in Jinghe River system, with average Shannon-Weiner species diversity index( H) of 2. 38 and Evenness index ( J) of 0. 75. Clustering analysis based on zoo-plankton density revealed that the zooplankton in every section of Jinghe River systems was divided into four groups. The canonical correspondence analysis indicated that the community structure of zooplankton in Jinghe River system was primarily affected by the water environment including water temperature, altitude and channel width. Water quality evaluation indicated that the water in Jinghe River belonged toβ-middle polluted, and a simple zooplankton community structure based on the community structure of zooplankton, according to the species diversity index. Thus, it is necessary to strengthen the ecological management and to reduce the nonpoint source pollution in Jinghe River.