中国合欢属植物地理分布和群落特征研究

合欢属植物在中国分布范围广 ,地理变异大 .它们大多为先锋树种 ,在暖温带和亚热带植物群落中多以伴生种出现 ,然而在热带落叶季雨林中却成为优势树种 .我们分析了台湾、海南、云南、广西四地合欢林的群落特征 .结果表明 :合欢属植物成为优势树种是由特殊的生境条件和频繁的人为干扰造成的 ,合欢群落所在的落叶季雨林并不是地带性顶极群落 ,而是一种干扰顶极

Geographical distribution and phytocenological features of genus Albiziz Durazz

The plants of genus \%Albizia \%Durazz.are widely distributed in China.They show a significant geographical variation and morphological.Most species in this genus are pioneer trees, they often act as co\|dominant species in warm temperate forest and sub\|tropical forest,but they become dominant trees when growing in tropical monsoon forest.In this paper the phytocoenological features of genus \%Albizia \%Durazz.in Taiwan, Hainan,Yunnan Provinces and Guangxi Zhuang Autonormous Region are studied. The results show that the plants of this genus becoming dominant trees is caused by special natural conditions or frequent human activities' disturbance, the Monsoon forest which is dominanted by \%Albizia\% plants is not the zonal primary community,but a disturbant climax.