中文摘要：

河岸带植被是维持河流系统健康的重要屏障,掌握其分布特征对河流生态修复具有重要的作用。以浙江省桐乡市石门镇白马塘村河流为研究对象,通过野外调查和统计分析,研究了该典型平原村庄中小河流河岸带植被的分布特征及其物种的多样性差异。研究表明,该区域内共有维管束植物27科41属43种,群落物种组成较为丰富。植被分布在河岸的纵横向上表现出显著的差异性,随着与河岸坡脚距离的增加,植被Shannon-Wiener多样性指数（H′）及Pielou均匀度指数均（J）均呈下降趋势,距坡脚1～2m范围内的植物Shannon-Wiener多样性指数及Pielou均匀度指数（J）都显著高于岸顶以外区域（p〈0.05）。

英文摘要：

Riparian vegetation is a great shield that maintains a healthy river ecosystem and knowing the distribution characteristics of riparian vegetation well plays an important role in ecological restoration. Distribution characteristics and biodiversity of vegetation in riparian zone of north Zhejiang Province, as a typical rural flat area, are investigated and analyzed by using field investigation and la boratory analysis method. In the riparian zone, there are 43 vegetation species, which are categorized into 27 families and 41 genera. What＇s more, there are big differences in Shannon-Wiener index（H＇）and Pielou evenness index（J）of different segments. H＇ and J decrease from slope toe to upland. Particularly, these two indexes are significantly higher between 1-2 m from toe to upland than other areas.