Study On Species Diversity Of Bryophytes In The Southeast Of Chongqing, China

This paper based on the 2130 specimens of bryophytes that collected in the southeast of Chongqing, China. This region has not been investigated systermatically. After this study, 62 families, 159 genera and 448 species are identified, including 1 newly genus —Hagenialla and 90 newly species to Sichuan.In the same time,a endangered taxa of bryophyte is found— Trichocoleopsis tsinlingensis Chen ex.M. X. Zhang. There are 17 dominant families such as Hapnaceae with 10 or more than species, and there are 23 dominant genera with 6 or more than species. According to the study on dominant families and genera, it can be concluded that the bryophytes in the southeast of Chongqong of China are temperate.To be compared with other areas. The bryophyte in the southeast of Chongqing is one of the rich areas in China. For considering the relationship between the flora of bryophytes in this region and other 4 near areas, it can be concluded that this region is very closed to Mt. Jinfo.According to "the area-types of Chinese genera of seed plants" by Wu Zheng-yi, 14 types of the flora of this region are recognized. East Asia element is the most important one in this region, and the Tropical elements are low so the temperate element is the body flora of the southeast of Chongqing.To study the flora between this region and other areas, the relationship is very closed to Mt. Jinfo, Mt. Fanjing and Mt. Jizu but is far to the Mt. Jiuwan of Guangxi.In the southeast of Chongqing, there are nearly half of bryophytes on soil and on humus. To be compared the richness of the 9 sample points in southeast of Chongqing, the species diversity of bryophytes in primary forest are the richest one. According to the study on the influence factors on the species diversity, the activity of human beings is the most important factor. And other environments compared to impact the species diversity. The species diversity of epiphytic bryophytes is rich in this region, but the bryophytes on rotten log are not so rich.