Moss Flora Of Daweishan Nature Reserve, Yunnan Pingbian County

The geographical information of Daweishan Nature Reserve in Yunnan Province including position, topographty and physiognomy, climate, water features, soil and vegetation. It indicated that it was in a trasitional area with multi-delimitations. The mossflora was abundant and special. There's no comprehensive research conducted yet.A total of 323 moss species (including subspecies and varieties) in 36 families and 129 genera were found in Daweishan Nature Reserve after a careful examination and identification of 1546 moss specimen by two collections. Among them, 5 species were new to China and 2 families and 48 species (in 18 families and 32 genera) were new to Yunnan province. The highest number of moss species was around Shuiweicheng which has an elevation of 1800-1900m. The Pleudocarpous mosses, especially some tropiacal-subtropical distributed families and genera were dominant.In thesis, we studied the relationship of mossflora between Daweishan Nature Reserve and its adjacent areas. The comparisons of geography, climate and vegetation types of the nine areas were made. The species abundance, dominant families, similarity coefficient of genus and species and geographical elements were compared. The comparison items of geographical elements covered floristic spectrum and its Principal Component Analysis (PCA) method as well as its hierarchical cluster analysis. The specific geographical elements of mossflora were evaluated by comparing with that of tropical, temperate and East Asian elements in detail. Furthermore, we discussed the relationship between Daweishan Nature Reserve and Taiwan, Japan and 4 tropical Asian areas. Research results are as follows:1. The main characteristics of the mossflora of Daweishan Nature Reserve were plentiful species, high level of endemism, dominanting east Asian elements and tropical affinities. The Daweishan Nature Reserve had a highest species abundance with 44 species endemic to China (13.62%) and 8 genera endemic to East Asian (6.2%). East Asian elements (32.5%) were dominant, mostly including widely-distributed East Asian element and Sino-Japan element. Tropical elements, the major part of which wasTropical Asian element (66.67%), were abundant and complex (32.4%), whereas Temperate elements were declining (9.0%).2.Except for cosmopolitan, the similarity coefficient of both genera and species showed that Daweishan Nature Reserve had more similarity with Jiuwanshan Mountain, Jizushan Mountain and Tai Mao Shan due to the homologous circumstances for species development and a transitional climate belt where the tropical and subtropical elements meet. For each sites, the intimacy correlation reflected by the two coefficients was in a general accord and coincided with its geographical location, climate and vegetation type.3.Based on the above study, we reconsidered the borderlines of some transitional belt which Daweishan Nature Reserve lies in:(1) between As2 zone As4-zone, but is better put in As2 zone.(2) between Lingnan zone and Yungui zone, but is better put in Lingnanzone.(3) between Holarctic zone and Paleotropical zone, but is preferablybelongs to Holarctic zone.All above indicate that this area is worth further exploring for its bryophytes. In adition, a moss checklist of Daweishan Nature Reserve, a list of cited literature, 11 figures and 12 charts are included.