太湖西区公路两侧植物物种多样性的研究

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Pielou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。

Study on the Plant Species Diversity Along the Roadsides in Taihu West Zone

According to the different plant communities,the arbor,shrub,herb and liana plant layers were distinguished.Main plant community species diversity was studied along Taihu roadside in Wuxi Mashan National Tourist Holiday Resort,by using species richness index,Shannon-Wiener index,Simpson index and Pielou evenness index.The results showed as follows:(1)The four species diversity indices of the arbor layer and the shrub layer are interrelated.However the herb layer is different.(2)By artificial vegetation renovating,plant species diversity along the road has been more remarkably increased than non-restored spot,so that the roadsides have been protected and landscape improved.(3)The plant community in restored lake shoal has high community rate of coverage,but designed plant variety is single,so that it's species diversity is less than the non-restored.(4)Original plant community species diversity was most above average.Reasonable artificial restoration can increase biodiversity for original destroyed vegetation.(5)By several calculating methods of species diversity,the species diversity in an area can be objectively reflected.