Studies On The Flora And Ecological Distribution Pattern Of Moss In The Jiwozi Area Of Qinling Mountain

Jiwozi area is located in Chang'an country of Shaanxi province, more than 60km from Xi'an city, which belong to the Niubeiliang Nature Reserve in Qinling Mountain. Niubeiliang Nature Reserve step across the north and south slope of Qinling Mountain, its geographical coordinates is between 108°45'～109°03'E,33°47'～33°55'N, and the total area is 16520hm2. Its unique geological features include the great disparity of altitude difference, varied topography, humid climate and luxuriant vegetation, which provide superior environmental conditions for Moss surviving. The diversity types and distinct distribution of forest, not only grow rich moss resources, moreover it is very propitious to the survey of the ecological distribution of moss in the Jiwozi area.Baed on the field survey and identify, refer to a large number of related reference, the flora composition and ecological distribution pattern of Moss in the Jiwozi area were analyzed. The statistics of Moss 97 species belong to 52 genera and 20 families were recorded. Through the ecological quadrat surveying of Moss in different forest types and the DCA researching of all the numbers, it can sum up the distribution pattern of Moss in this area.In the Moss flora composition, it can found that the Pottinales, Bryaceae, Mniaceae, Thuidiaceae, Brachytheciaceae, Entodontaceae are the dominant family, and the dominant genera are Barbula Hedw.,Bryum Dill.,Mnium Hedw.,Anomodon Hook., Brachythecium B. S. G,Entodon C.Muell. They are not only the components of the Moss, but also the suitable habitat types under the conditions of this area. The presence of single family and genera indicate the Moss of this area is less differentiation. The geographical elements of mossflora include 9 types in Jiwozi area, among them the North Temperate element is obviously advantage, accounting for 37.35%; The second one is E. Asia accounting for 19.28%; Endemic of China element is the third one which accounting for 9.64%.To give a better explanation about the relationship between Moss distribution and nature environment, we used the ecological quadrat surveying and the DCA researching to analyze, the result showed that the distribution of moss is correlated with forest types. In broad-leaved forest, Mnium cuspidatum Hedw., Climacium dendroides (Hedw.) Web. et Mohr., Haplocladium angustifolium (Hamp. Et Muell.) Broth. and Myuroclada maximowiczii (Borszoz.) Steetre et Schof. were the main moss. Barbula vinealis Brid., Brachymenium nepalense Hook., Drummondia sinensis C. Muell., Brachythecium salebrosum (Web.et Mohr) B. S. G. and Pylaisia polyantha (Hedw.) B. S. G. were the main moss in coniferous forest and mixed broadleaf-conifer forest.