摘要
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分布类型和温带性的比例相当,其中,热带性分布类型以泛热带分布为主,而温带性分布类型以北温带、东亚北美洲间断以及东亚分布占有较高的比例.采用温带属与热带属的比值(T/R值)衡量区系的过渡性,发现浙江省开化县乌冈栎群落植物区系的T/R值为1.033,处于区系平衡点;广东省仁化县、福建省将石地区、湖南省沅陵县和贵州省荔波县的乌冈栎群落植物区系的T/R值分别为0.467、0.750、1.208和1.211,它们的区系均兼有热带和温带的性质.区系图谱的相似性系数表明,各地乌冈栎群落具有较高的相似性,它们在亲缘关系上存在着密切的联系.乌冈栎群落区系在地史年代上的起源与演化和西部高山硬叶栎类林有着紧密的关系,其形成时间应该不会晚于中新世.
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.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2011年第3期74-82,共9页
Journal of Gansu Agricultural University
基金
林业公益性行业科研专项(201004094)
"十一五"国家科技支撑课题子专题(2006BAD03A0507-2)
关键词
乌冈栎
群落区系
组成
分布类型
起源演化
Quercus phillyraeoides
community flora
composition
distribution type
origin and evolution
作者简介
谢春平（1980-），男，讲师，博士，主要从事植物生态学研究．E-mail：xcp80@yahoo．com.cn
通信作者：方炎明，男，教授，博士生导师，主要从事植物研究．Email：jwu4@njfu．edu．cn
