汝城至郴州高速公路沿线植被特征

Characteristics of Vegetation along Rucheng-Chenzhou Highway

对汝城至郴州高速公路沿线设置9个植被调查样方,重点调查了沿线原生植被物种组成、高度、盖度、株丛数等,着重分析了不同样方内植被物种丰富度、物种共有度和乔木层物种优势度的空间变化特征,为公路景观生态建设和植被恢复提供重要参考.结果表明总体丰富度在2-6之间变化;应用Jaccard指数对沿线个植被样方物种共有度进行分析,发现其呈现非常有规律的变化,各植被样方以相邻的物种共有度最高,距离越远,物种共有度越低;乔木层优势度指数相差较大.

In order to provide reference for an ecological construction of vegetation and its restoration along the highway from Rucheng to Chenzhou, a field survey was carried out to study its species composition, height, coverage and number of plants. Based on the data from the field study, the spatial variation features of species richness, species share and arbor dominance were analyzed. Results show that the total richness ranges between 2 and 6~ that the value of Jaccard index decreases with the increase of the distance between samples ; and that the lower the species share is, the bigger the difference among arbor dominance indexes.