广东阳春鹅凰嶂自然保护区种子植物区系研究

Studies on the spermatophytic flora of E'huangzhang Nature Reserve in Yangchun of Guangdong Province

鹅凰嶂自然保护区位于广东省阳春市境内 (1 1 1°2 1′2 9″～ 1 1 1°3 6′0 3″E ,2 1°5 0′3 6″～ 2 1°5 8′40″N) ,为北热带地区。计有维管植物 2 1 0科 75 4属 1 5 80种 (包括亚种与变型 ) ,其中种子植物有 1 72科 681属 1 44 8种。研究分析和讨论了本区主要植被类型、种子植物区系及珍稀濒危植物 ,其种子植物区系特征是 :种类组成比较丰富 ,地理成分复杂 ,联系广泛 ,以热带成分占绝对优势 ,是典型的热带北缘区系性质 ;植被类型以山地雨林为主 ;区系起源古老 ,原始类群丰富 ;特有性比较高 ,珍稀濒危植物明显。建议对一些濒危物种采取有效的保护措施。

The E'huangzhang Nature Reserve(111°21′29″～111°36′03″ E,21°50′36″～21°58′40″ N)is located at Yangchun County,Guangdong Province,belonging to North tropics where there was well covered by the large areas natural forests. There are 1 580 species wild vascular plants in this area,which attached to 210 families and 754 genera, among them 172 families,681 genera and 1 448 species are seed plants. The main vegetation types and floristic characteristics and rare and endangered species in E'huangzhang region were studied. Through the analysis the preliminary conclusions can be drawn:rich in comprising species,ancient in origin,complexion,varied in geographical elements,having an extensive connection with nearby floristic areas,but dominating in tropical elements. Montane rain forest is the main vegetation type of this area. The flora is high in endemism and obvious in rare and endangered species. It is suggested that some valid measures should be taken to protect the species in imminent danger.