元江自然保护区中山湿性常绿阔叶林植物区系初步研究

元江自然保护区还保留一定面积的中山湿性常绿阔叶林。在群落植物区系的分析上,热带性质的属多于温带性质的属,显示该保护区的中山湿性常绿阔叶林在属的水平上具有较强的热带性质。从种的结构分析看,只有热带亚洲成分、中国-喜马拉雅成分及中国特有成分能够贯穿于群落各层次之中;其种的区系成分以中国-喜马拉雅和中国特有成分占优势,同时热带亚洲成分也占有相当的比例,说明该植物区系具有由亚热带向温带过渡的性质;而中国特有种的进一步分析,表明本保护区中山湿性常绿阔叶林的构成种类主要起源于云南和我国南方地区。群落中温带性质的种比热带性质的种多,说明在本区山地条件下,在该群落中形成和迁入大量温带的种类。

A Preliminary Floristic Study on the Mid-montane Humid Evergreen Broad-leaved Forest in Yuanjiang Nature Reserve

Yuanjiang nature reserve retains a certain Mid-montane Evergreen Broad-leaved forest.Tropical genera elements are more than the temperate genera.It shows that genera level of Mid-montane Evergreen Broad-leaved forest has strong tropical nature.From commnuity structure of species,the only Tropical Asian,Sino-Himalayas and Endemic to China elements occure in all levels of communties;its main element is Sino-Himalayas and Endemic to China.Meanwhile Tropical Asia elements play an important role,indicating that the flora has a transition from subtropical to temperate;Endemic to China elements which have further analysis also show that species composition of Mid-montane Evergreen Broad-leaved forest has main origin of Yunnan and the southern region of China.In communities species of the temperate is more than tropical species,which shows that communities form and move a lot of temperate species under the conditions of the mountain.