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Bacterioplankton Diversity in Xiamen Houxi River Watershed Along an Urban-rural Gradient and Its Relation to Environmental Factors

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Author:
No author available
Journal Title:
Chinese Journal of Applied & Environmental Biology
Issue:
4
DOI:
10.3724/SP.J.1145.2012.00591
Key Word:
河流;浮游细菌;生物多样性;城乡梯度;环境因子;城市化;DGGE;厦门

Abstract: 为研究城市化对河流浮游细菌的影响,选取厦门后溪流域沿城乡梯度采集样品,并利用变性梯度凝胶电泳(Denaturing gradient gel electrophoresis,DGGE)和多元统计方法对浮游细菌群落空间分布格局进行分析.结果表明,Shannon-Weiner多样性指数和DGGE条带数随着采样站点和城市中心距离的减小呈现先升高后下降的趋势.聚类分析(Cluster)和多维尺度分析(Multidimensional scaling,MDS)将12个站点的浮游细菌群落分为4组,测序结果显示β-变形菌( Betaproteobacteria)是优势类群,占40.0%.统计分析表明,pH和总氮(Total nitrogen,TN)是影响后溪浮游细菌群落组成最主要的环境因子,他们共同解释了47.6%的群落组成变化.总之,沿城乡梯度随着水体理化指标的变化,浮游细菌群落也发生明显转变,表明后溪浮游细菌受到城市化的强烈影响此外,结果也提示DGGE可以作为监测与评价河流生态系统健康的重要工具.

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