<正>按植物群落的乔木层、灌木层、草本层和藤本层，运用物种丰富度指数（S）、Shannon—Wiener指数、Simpson指数和PielotI均匀度指数，研究无锡马山国家旅游度假区公路两侧主要植物群落的物种多样性。结果表明：（1）各植物群落乔木层和灌木层的4种生物多样性指数变化具有相关一致性，草本层则差异较大；（2）公路边坡经人工植被修复后，植物物种多样性比未经修复的显著增加，起到防护边坡和改善景观的作用；（3）修复的湖滩地植物群落盖度大，但种类单一，故物种多样性较低；（4）原生植物群落的物种多样性最大；合理的人工修复可促进受损植物群落生物多样性增加；（5）通过物种多样性计算方法的比较，可以更客观地反映一个地区的物种多样性状况。

The environmental effects of ecological landscape afforestation pattern along the Grand Canal in Yangzhou were studied. The results showed that the noise and the dust of the tested patterns were the most significantly or significantly different. The effect of noise decreasing and stagnant dust from the big to small ordinal (the order of both is the same) : the afforestation pattern community, the lawn in the patterns, and the control(the hard lanes nearby the pattern community). The noise of the ecological environmental pattern community, the ecological healthy community and the ecological landscape community were decreasing by 12.63%～20.20%,9.22%～14.59% and 8.86%～9.17% compared with the noise of the control respectively, while the quantity of the dust in the air were decreasing by 63.65%, 55.00% and 54.68% compared with the one of the control; and the quantity of the stagnant dust were decreasing by 36.40～,19.19% and 5. 12%, compared with the one of lawn. The community of the city flower of Yangzhou Viburnum macrocephalum also showed the noise decreasing effect. The noises were decreased by 14.13% and 4. 00% respectively compared with the ones of the control (the hard lane) and the lawn in patterns. The research results provided scientific data for the city forest ecological network system construction.