滇桂两省中越边境地区藓类物种多样性及区系研究

对2012~2015年间采集自滇、桂两省中越边境地区的2 600余份藓类植物标本进行物种鉴定和文献研究,分析了中越边境地区藓类植物的物种组成和区系特点,并将中越边境地区与邻近地区和国家的藓类植物进行物种丰富度、属种相似性和区系谱的比较及聚类分析。结果表明:(1)滇、桂两省中越边境地区共有藓类植物51科、155属、452种(含种下单位),其中卷边麻锦藓Taxithelium kerianum(Broth.)Broth.]为中国新记录种。(2)中越边境地区的藓类植物共有优势科9科,优势属12属。(3)中越边境地区的藓类植物区系以热带亚洲成分所占比例最高,达31.19%,其次为东亚成分(25.46%)和北温带广布成分(13.76%)。(4)与中越边境地区的藓类植物属及种的相似性最高的分别是越南和中国贵州。(5)中越边境地区的藓类植物区系与贵州、广东、福建及台湾的亲缘关系较近。

Species Diversity and Moss Flora of Sino Vietnam Border Area (Yunnan & Guangxi, China)

More than 2 600 moss specimens were collected from Sino Vietnam border area (Yunnan & Guangxi, China) during 2012 to 2015. Through the specimen identification and literature research, we analyzed the species composition and floristic characteristics of Sino Vietnam Border Area (Yunnan & Guangxi, China), comparisons of moss D_Gl and similarity index of genera & species along with floristic spectrum and the cluster analysis of Sino Vietnam Border Area (Yunnan & Guangxi, China) with adjacent provinces and countries were made. Results are as follows: (1) the moss flora of Sino Vietnam Border Area (Yunnan & Guangxi, China) consist of 452 species (including infraspecific taxa), belonging to 155 genera of 51 families. Taxithelium kerianum (Broth.) Broth. was reported new to China. (2) There are nine dominant families and 12 dominant genera in Sino Vietnam Border Area (Yunnan & Guangxi, China). (3) The moss flora of Sino Vietnam Border Area (Yunnan & Guangxi, China) is dominated by tropical Asia element, which accounts for 31.19% of the entire species. East Asia element (25.46%) and North Temperate element (13.76%) ranked second and third, respectively. (4)Vietnam has the highest similarity index of genera with Sino Vietnam Border Area (Yunnan & Guangxi, China), whereas Guizhou(China) gets the highest similarity index of species within the studied area. (5) The moss flora of Sino Vietnam Border Area (Yunnan & Guangxi, China) is more closely related to Guizhou, Guangdong, Fujian and Taiwan.