道路边坡坡度对植被恢复中物种多样性的影响研究  

Effects of Roadside Slope Gradient on Plant Diversity during Revegetation

作　　者：李成俊[1] 孙琦[1] 陈璋[1] 庞亮[1] 胡兴[1] 龙凤[1] 

机构地区：[1]四川大学生命科学学院,成都610064

出　　处：《植物研究》2013年第4期477-483,共7页Bulletin of Botanical Research

基　　金：提高黄荆抗旱性的脉冲水分模型研究(2012SCU11088)

摘　　要：以成都平原周边的5条道路的边坡植被群落作为研究对象,采用样线法,研究坡度对道路边坡的植物群落多样性的影响。选取101个海拔在300～400 m间并且土壤质地相同的边坡样方进行坡度分析。结果显示:(1)选取的样方中,共出现142种植物,属于61个科,121属。(2)边坡坡度对阳坡和阴坡的灌木层与草本层的植物群落物种多样性具有显著的影响(P<0.05)。(3)边坡坡度对阴坡群落的均匀度指数影响显著(P<0.05);而对阳坡群落的丰富度影响相对较大,呈现先增加后降低的趋势。分析表明,边坡坡度对成都平原周边地区道路边坡的植物群落多样性具有显著影响;在坡度<35°的条件下,植被群落恢复效果较好,群落的多样性高;而对>35°的边坡来说,多样性指数呈下降趋势,不利于后期边坡恢复。For the purpose of determining the effects of slope gradient on its plant community diversity, some investigations were conducted with the Line Transect Method in 2010 along five roads surrounding Chengdu city. A total of 101 slope quadrats were investigated. These slopes have an altitude between 300 -400 m and the same soil texture. The results showed that ： （ 1 ） within the quadrats, there were 142 species of plants, belonging to 61 families and 121 genera. Sixteen genera and 19 species belonged to Compositae; Gramineae had 14 genera and 16 species ; Leguminosae consisted of 9 genera and 11 species ; Rosaceae had 4 genera and 7 species. These four families totally had 43 genera and 53 species, which account for 37% of the total species ; （2） slope gradient had significant effect （P 〈 0.05 ） on the species diversity of shrub and herb layer of both sunny and shady slopes ; （3） community evenness index of shady slope was significantly influenced by slope gradient （ P 〈 0.05 ） ; to the richness of sunny slope community, its influence was significant. Analysis showed that the influence of gradient on the community diversity of roadside slopes surrounding the Chengdu Plain was significant ; on the slopes where gradients were below 35°, vegetation community recovered well and the diversity of community was high; when the gradient was above 35°, diversity indexes declined rapidly, which made vegetation restoration harder.

关 键 词：坡度 边坡 植物多样性 道路 

分 类 号：S718.54[农业科学—林学]