贵州红水河谷地区苔藓植物区系研究

Mosses flora of Red River in Guizhou Province

关键词:  苔藓植物  新记录  苔藓植物植物区系  物种多样性

Key words:  bryophyte  new record  moss flora  diversity

摘要:

对贵州红水河谷地区的500余号苔藓植物标本进行了调查、采集和分类鉴定,得到苔藓植物36科,78属,204种(包括8亚种4变种和1变型)。其中藓类植物23科60属163种,苔类植物13科18属41种。为贵州增加新记录5种。划为13种类型。其中具热带性质的区系成分最丰富,占总数的38.02%,构成该区苔藓植物区系成分的主体; 具温带性质的成分占总数的33.85%; 东亚成分、特有成分、东亚-北美成分占该区的1.56%。选择9个地区,通过属和种的相似性系数全面比较,表明该地区与同纬度茂兰自然保护苔藓植物的相似性最高,关系最密切; 与低纬度鼎湖山的相似性较高,关系较近; 与高纬度小五台山和长白山相似性最低,关系最远。还统计了各地区的植物区系谱,分析该地区与其它地区的藓类植物区系关系。并着重就该区的热带边缘性的特点进行了讨论。

Abstract:

The Red River Region has not been investigated systematically. In 2003 and 2004,the author and companions made three bryophytic surveies in this region,and about 500 specimens of bryophytes were collected there. From all these specimens,36 families,78 generas and 204 species(including 8 subspecies,4 varieties and 1 form)are identified,including 5 newly recorded species in Guizhou. According to“The areal-types of Chinese genera of seed plants”by Wu Zheng-yi,13 type of the bryoflora in this region are recognized. Tropical elements is the most important ones. For considering the relationships between the mossflora of low mountain valley monsoon forest and other mountains, the author selected nine regions. Comparing the similarity coefficient of moss genera and species between this region and other mountains, this region is very close to the Mt.Maolan. While the similarity coefficient between this region and Mt.Changbai is the lowest,so the relation between them is very far.