白花兜兰的群落结构特征分析

运用群落学的调查方法,对广西木论国家级自然保护区内的白花兜兰的群落特征进行调查。结果表明:广西木论国家级自然保护区内分布有7个白花兜兰分布点280丛,聚集群居于石灰岩常绿落叶阔叶林中的陡峭石壁的石缝穴淋溶黑色石灰土上,表土层腐殖质丰富,以分株繁殖为主,罕见幼苗,白花兜兰的分布与自然环境因子有密切关系。所依存的群落分为乔、灌、草3层,多为单种属,结构复杂多样。生存环境恶劣,种子繁殖率低,环境依存度高,是白花兜兰的致濒原因之一。

Analysis of Community Structure of Paphiopedilum emersonii

Community characters of Paphiopedilum emersonii was surveyed using by quadrat sampling technique in Mulun national nature reserve,northwestern Guangxi.The results showed that there were 280 clusters of P.emersonii,distributed in 7 sites were detected in Mulun national nature reserve.P.emersonii inhabited in flocks on black soil of cliff,with abundant humus in limestone evergreen deciduous broadleaved forest.P.emersonii mostly bred by natural plantdivision and few seeding were found in the field.The distribution of P.emersonii was in closed connection with environment factor.Mostly of P.emersonii was single species and the community was divided as tree layer,shrub layer and herbaceous layer,structure was complex and diverse.The endangered factor of P.emersonii included fierce environment,lowered breeding success and highly habitat dependence.