摘要
采用典型样方法研究茂兰喀斯特森林群落植物多样性的特征。主要结果有:1茂兰喀斯特森林群落物种组成丰富,但单种科单种属多,单种属占总属数的61.74%;乔木层优势种不明显,灌木层和草本层优势种较明显;乔木层重要值最大的种类可能并不占据优势层片,群落类型十分复杂多样;2在群落不同层次,物种多样性与地带性常绿阔叶林群落(灌木层多样性)最高不同,仅物种丰富度为灌木层>乔木层>草本层,Shannon-Wiener指数、Simpson指数及均匀度指数都是乔木层>灌木层>草本层;3茂兰喀斯特森林原生性强,是中亚热带喀斯特原生植被的典型代表。针对这类复杂多样的植被,深入研究并明确揭示其群落特征及其形成机理,可为同地带喀斯特退化环境植被恢复与人工造林的物种配置提供科学参照。
Based on investigating data of 10 000 m2 of 9 plots,details of phytocoenological characters of the community,such as species structure and community diversity,were provided.The main results are：①vascular plants in the original forest are very divers while neither species in genus or genus in families is scarce.Up to 61.74% of the total genera constitute only one species.Dominant species are unclear in tree layers,and the species with biggest important value may not be those in canopy.Shrub layer are dominant with species of Bambusoideae,Lauraceae,Fagaceae,Myrsinaceae,and herb layer are dominant with species of Urticaceae,Acanthaceae and Dennstaedtiaceae;②differ from the typical ever green broad leave forest in the same belt,which shrub layer is the highest in all layers of the community,except species richness,Shannon-Wiener index,Simpson index and evenness index of tree layer are the highest,following by shrub layer and herb layer in turn;③The fact that the community has complicated species composition but unclear dominant species may indicate that most of species have been survival in the long history and the forest contain much information of what it should have had.It may provide effective reference to afforestation to the large rocky desertification areas in similar karst environment in Southwestern China.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2011年第1期60-65,共6页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家重点基础研究发展计划项目(2006CB403207)
中国地质调查局地质调查工作项目(水[2010]矿评03-07-03)
