安徽大别山北坡植物区系与邻近地区植物区系关系探讨

A STUDY ON THE FLORISTIC RELATIONS BETWEEN THE NORTHERN PART OF DABIE MOUNTAINS IN ANHUI AND THE ADJACENT FLORISTIC REGIONS

安徽大别山北坡是大别山的主体部分,也是目前大别山森林植被保存较好的地区之一。作者通过对该区植物区系与邻近地区植物区系之间共有种和区系成分的对比分析,以及通过与邻近山地森林植物区系之间相似性系数的对比分析,初步得出下列结论:(1) 该区植物区系与华东植物区系的关系最密切,其次是华中,再次依次为日本、华北、华南、西南、东北,与西北和青藏高原植物区系之间很少有联系。(2) 该区植物区系与日本植物区系之间的关系比与我国西南植物区系之间的关系要密切。(3) 该区植物区系与天目山、神农架、中条山、庐山、武夷山诸山地森林植物区系之间关系紧密程度依次为天目山、庐山、神农架、武夷山、中条山。(4) 大别山植物区系在我国植物区系分区上应属于华东区。(5) 在我国植物区系分区上,华东区与华中区的分界线在湖北省境内应位于“襄樊—宜昌”一线,华东区与华北区的分界线在安徽省境内应位于“霍丘—滁县”一线。

Dabie Mountain is situated in the area which bounderes with three provinces (Anhui, Hubei, Henan). The northern part of Mt. Dabie in Anhui is the main part of whole Mt. Dabie, and is one of the areas where natural forest vegetations are well preserved. By means of the contrastive analyses of the floristic elements and the shared plant species between Mt N. Dabie in Anhui and the adjacent floristic regions, the results show that: (1) The northern part of Mt. Dabie in Anhui is the closest to East China in flora, next to Central China, thirdly to Japan, fourthly to North China, fifthly to South China, sixthly to Southwest China and seventhly to Northeast China; but scarcely with Northwest China and Qinghai-Xizang plateau; (2) The floristic relation of the northern part of Mt. Dabie in Anhui with Japan is closer than that with Southwest China; (3) According to the floristic relation between the northern part of Mt. Dabiein Anhui and adjacent mountains from much closer to little closer, the sequence is Mt. Tiemu in Zhejiang Province, Mt. Lushan in Jiangxi Province, Mt. Shennongjia in Hubei Province, Mt. Wuyi in Fujian Province, and Mt. Zhongtiao in Shanxi Province; (4) The author believes that the flora of the northern part of Mt. Dabie in Anhui should be an integrated part of the Flora of East China; (5) On the regionalization of Chinese flora, the author's view is that the demarcation line between East China region and Central China region in Huhie Province should be from Xiangfan to Yichang, and the demarcation line between East China region and North China region in Anhui Province should be from Huoqiu to Chuxian.