新疆三工河流域的苔藓植物及其分布特征

报道了新疆三工河流域的苔藓植物，计37科91属216种（变种、变型），包括1新疆新记录属和1新疆新记录种。其中科数约占新疆天山总科数的75%，属数约占65%，种数约占60%。并分析了该流域苔藓植物的分布特征。研究表明：该流域苔藓植物可分为树生、石生、石而薄土生、腐木生、水生和土生苔藓植物群落。其中，土生种类种数最多，约占该流域苔藓植物总数的44%。其次为石面薄土生的种类，约占该流域苔藓植物总数的31%。不同的植被带又具有其独特的苔藓植物种类组成和分布特点。

Study on Bryophytes and Their Distribution Patterns in Sangong River Watershed, Xinjiang

Rising on the northern side of Bogda Peak, Xinjiang, Sangong River and Tianchi Lake at its middle reaches are the feeding sources of groundwater over the perimontane plains, and irrigate the fertile old and new oases and the natural vegetation. There are the ecotypes of snow-capped mountain, mountainous vegetation, oasis and derert within only about 80 km as the crow flies in the Sangong River watershed from Bogda Peak to Fukang, and the ideal geographical conditions are provided for research on the flora of bryophytes and ecology. Moreover, the bryophytes grow luxuriantly and are rich in species in the vertical vegetation zones. In this paper, it is reported that there are 216 species of bryophytes which belong to 91 genera and 37 families, including 1 genus and 1 species newly recorded in Xinjiang, in the Sangong River watershed. Among which the proportions of the families, genera and species occupy about 75, 65 and 60% of the total in Xinjiang respectively. The distribution patterns of the bryophytes in the watershed are analyzed. The results show that the bryophytes in the watershed can be classified into the communities growing on the surfaces of trees, rock, thin soil on rock, rotten wood, soil and in waters. The species of bryophytes growing on the soil and rock surfaces are dominant, occupy 44 and 31% of the total respectively. The composition and distribution patterns of the bryophytes are different from the different vegetation zones.