珠三角区域省立绿道森林景观结构与多样性分析

Research on forest landscape structure and diversity of provincial greenway in Pearl River Delta

为明晰珠三角区域省立绿道的森林景观结构和多样性,以珠三角区域6条省立绿道为研究对象,探讨了不同类型绿道森林景观结构与多样性整体情况,结果表明:(1)珠三角区域6条省立绿道森林群落共有植物品种有243种,隶属78个科175个属;(2)在垂直空间分布特征上,以复层结构为主,其中乔木层树高以3~10m的分布居多,占总乔木总株数的82.36%;灌木层株高以1.0~2.0 m的分布居多,占总数量的57.98%,斑块地被层以0.4~0.6 m高的斑块地被居多,占总面积数的72.01%。(3)在水平空间分布特征上,乔木层以胸径10.0~20 cm的数量最多,占整个乔木数量的41.67%;灌木层以冠幅1.0~1.5 m居多,占整个灌木数量的48.31%;地被层以每个斑块10~50 m^2居多,占绿道斑块总面积的53.85%;(4)品种数量和物种多样性水平上呈都市型绿道>郊野型绿道>生态型绿道格局。

To clarify the the forest landscape structure and diversity of provincial greenway in the Pearl River Delta, the six provincial greenway were obtained and analyzed, Results showed that （1） there were 243 species in the forest community, belonging to 175 families and 78 genera. （2）In the vertical spatial distribution characteristics, it was based on stratified structure. The tree layer in the majority with 3 to 10 m lfigh plants, accounting for 82.36% of the total number; Shrub height of 1-2 meters is the largest, accounting for 57.98% of total; At ground layer, the 0.4 ~ 0.6 m high plants were major, accounting for 72.01% of the total number. （3）On the horizontal space distribution characteristics, the tree layers with the DBH 10.0 ~ 20 cm trees were accounted for the largest proportion, accounting for 41.67% of total; In the shrub layer, the shrub crown was 1.0 ~ 1.5 m majority, accounting for 48.31% of total; In the majority of 10 ~ 50 mS/patches, the patches of the patches occupied 611 of the total number of the green patches and 53.85% of the total area of 26 598.16 m2. （4） The number of varieties and species diversity level is urban greenway 〉 country type greenways 〉 ecological greenway pattern.