粤东代表山地铜鼓嶂与其它植物区系的数值比较

Numerical comparison of the floras between Tongguzhang in Eastern Guangdong and other floras in Eestern China

比较研究了粤东典型山地铜鼓嶂与其它9个山地植物区系成分的相似性。结果显示,铜鼓嶂与广东省莲花山和七目嶂的关系最近,同属粤东植物县,其科相似性系数分别为92.4%和93.2%,属相似性系数分别为77.5%和76.7%;铜鼓嶂与福建龙栖山的关系也较近,为一个亚省,其科相似性系数为84.1%,属相似性系数分别为67.4%,说明粤东南—闽西南植物区系的紧密联系及整体性;南岭及广西3个山地与铜鼓嶂同属于华南植物省,关系仍然比较密切,其科的相似性系数为85.5%-86.6%,属的相似性系数为64.0%-66.6%。海南尖峰岭属热带植物区系北缘,湖南武陵山属于华中植物区系,与铜鼓嶂所处的地理位置差异较大,其植物区系仍有较高的相似性,其科相似性系数分别为83.4%和82.5%,属相似性系数分别为52.3%和62.8%,在一定程度上显示出中国南方植物区系的统一性。中国东部森林区的16个区系属的各分布类型区系成分百分比(区系谱FER值)统计分析结果显示,这些区系的形成、发展和现状与地理气候的历史和现状有直接关系。

The flora of Tongguzhang and other 9 mountain forest floras of Guangdong, Guangxi, Fujian, and Hainan were compared. The following results were showed： （1） the flora of Tongguzhang has the closest relation to the floras of Lianhuashan and Qimuzhang, which belong to the floristic county of Eastern Guangdong. Their family similarities with Tongguzhang are 92.4% and 93.2% and those of the genetic similarities are 77.5% and 76.7%, respectively. （2） The family similarity between Tongguzhang and Longqishan of Fujian is 81.4% and that of the generic similarity is 61.4%. （3） The family similarities between Tongguzhang with Nanling and three mountains of Guangxi Province （Damingshan, Chenwanglaoshan and Shiwandashan） vary between 85.5% - 86.6% while those of the generic similarities vary between 64.0% -66.6% , which belong to Sothem China Province of flora. （4） Wulingshan （Hunan Province） and Jianfengling （Hainan Province） lie in different flora Subdisticts, but the family similarities with Tongguzhang are 83.4% and 82.5%, while those of the generic similarities are 52.3% and 62.8%, which are higher than 50% and exhibit the unity of the southern floras of China. （5） The result of the floristic spectrum analysis on the 16 forest floras of Eastern China showed that the floristic composition, florogenesis and regdonalization of the modem floras have close relation with their geographicaJ features.