Study On Moss Diversity Of Wanglang National Nature Reserve,Sichuan Province

As the first landed higher plants, bryophyte not only is sensitive to the environment and climate change, but also plays an important role in the restoration of vegetation. Among these, moss is an important group that comes from plant evolutionary process. It occupies an important position in the floristic composition. Understanding moss constitute, analyzing basic characteristics of moss flora, and revealing biodiversity variation of the moss of Wanglang Nature Reserve play important roles in investigating flora origin and evolution of Wanglang. They can also provide scientific basis for biodiversity and environmental analysis and protection for the protected areas and even the western Sichuan mountains.According to two years’ field investigation, identification and literature survey, this article discussed mosses floral composition and their characteristics in Wanglang National Nature Reserve, Sichuan Province, China. Then it clarified their distribution in different forest types (virgin forest, secondary forest, and the planted forest). By comparing the data of the mosses in Wanglang Nature Reserve and other six areas around (Yushu, Foping, Shennongjia, Mt. Emei. Mt. Jinfu, Mt. Dawei), this paper summarized the relationship between Wanglang Nature Reserve and the other six areas around. Conclusions can be summarized as follows:(1) Species of mosses in Wanglang Nature Reserve were rich. A totle of227species (including five varieties) belonging to33families,111genera were found;(2) The dominate mosses floras of Wanglang Nature Reserve were North Temperate. East Asia, and Endemic to China;(3) The mosses genera of Wanglang Nature Reserve were obviously different in different forest types. The number of common genera was40(36.04%of the number of total genera of mosses in Wanglang Nature Reserve), and that of uncommon genera was71(63.96%of the number of total genera of mosses in Wanglang Nature Reserve). And, among the three different forest types, secondary forest had the highest genera richness, followed by the virgin forest, and then the planted forest;(4) Mosses in Wanglang Nature Reserve were similar to Foping and Mt. EMei Nature Reserve. The similarity coefficient of genus reached up to60%, and the similarity coefficient of species was more than35%.