不同地区乌冈栎群落木本植物区系分析

采用吴征镒等的种子植物科属分布类型区系分析方法,对分布于我国不同地区(福建省绍武市将石地区、浙江省开化县、广东省仁化县、湖南省沅陵县、贵州省荔波县)的5个乌冈栎群落植物区系特征进行了研究.结果表明:不同地区的乌冈栎群落植物区系异同并存,与其他地区的区系存在着广泛的联系.从科属分布类型来看,各地乌冈栎群落植物区系的热带性...

Analysis on woody flora of Quercus phillyraeoides community in different areas

Based on the methods of family-genera areal-types of seed plants by Wu Zheng-yi,woody flora of 5 Quercus phillyraeoides communities in different areas were studied.The results showed that there were similarities and differences about the floristic characteristics of 5 communities,which had extensive relationship with any other flora.According to the floristic elements of family and genera,the tropical distribution was of the same ratio as the temperate one,meanwhile,the distribution type of Pantropic was the most important in the tropical elements.North Temperate,East Asia and North America disjuncted and East Asia were more important than any other temperate elements.The proportion of each type to the total as well as the ratio of temperate genera to tropical genera(T/R ratio) in each site was used to discuss the flora transitional characteristic.The T/R ratio of Quercus phillyraeoides communities in Kaihua Country(Zhehiang Province) was close to the floristic equilibrium point,which was 1.033.the T/R ratio of Renhua Country(Guangdong Province),Jiangshi District(Fujian Province),Yuanling Country(Hunan Province) and Libo Country(Guizhou Province) were 0.467,0.750,1.208 and 1.211 respectively,indicating the transitional characteristic to tropic or to temperate.It was also found that the T/R ratio increased with the increasing of latitude.The floristic spectrums of Jaccard's similarity coefficient showed that woody flora of 5 communities had highly similarity with the closely relationship.There was close floristic relationship between Quercus phillyraeoides communities and evergreen sclerophyllous forest of west China in the origin and evolution,Quercus phillyraeoides communities might origin no later than Miocene.