摘要
采于鄂西南的标本1 876号,得到苔藓植物61科,157属,388种及种以下分类单位;其中有湖北苔藓植物新记录11科,34属,208种。对鄂西南地区苔藓植物区系成分进行划分,得15种类型。其中东亚成分107种,占总数的29.23%;北温带成分79种,占总数的21.59%;热带亚洲成分70种,占总数的19.13%。该地区苔藓植物区系以温带、热带和东亚成分为主,三者比例大致相当,表明鄂西南地区是这一经度上不同类性质的苔藓植物的交汇点。一定比例的其他成分表明该地区区系成分的复杂性。6个山体与鄂西南地区的苔藓植物区系比较表明,武夷山、九万山、神农架和梵净山4个山体相似性系数均超过50%,与鄂西南地区苔藓植物区系有亲缘关系,属近亲植物区系;与东部天山和长白山苔藓植物区系关系疏远,亲缘性不大。
From August to September in 2005, the auther and his companions made bryological survey in the southwest of Hubei province and 1 876 packages of bryophytes were coUected. From these specimens,61 families, 157 genera and 388 species （ including subspecies and varieties） are identified. Among them, 11 families, 34 genera and 208 species of bryophytes are first found in Hubei province. The East Asian elements are the most important ones with 107 species corresponding to 29.23% of the total. Following the East Asian elements, the North Temperate elements consist of 79 species corresponding to 21.59% of the total. The third one is the Tropical Asian elements including 70 species sharing 19.13 % of the total. As a word, the Temperate elements, the Tropical elements and the East Asian elements construct the main body of bryophytes in this region together and this truth shows that this region is the communicating point of bryophytes with different traits. Moreover,the complexity and particularity of the regional bryoflora are also proved by other elements of certain proportion. For considering the relationship between the bryoflora of S-W Hubei and those of other regions,the anther selected six regions. The similarity coeflicients of genera between S-W Hubei and Wuyi Mountains, Jiuwan Mountains, Shen-nongjia Mountains, and Fanjing Mountains are more than 50%. The results show that the relation between the bryoflora of S-W Hubei and that of these regions is the most closest because of their genera similality coeflicients, while the one between them and that of eastern Tianshan and Changbaishan regions is opposite. This result of comparison is in acoordance with the common law of flora.
出处
《山地农业生物学报》
2006年第6期510-518,共9页
Journal of Mountain Agriculture and Biology
基金
国家自然科学基金资助项目(30360006)
