INTERSPECIFIC RELATIONSHIP ANALYSIS OF DESERT RIPARIAN FOREST PLANT COMMUNITIES IN THE MIDDLE AND LOWER REACHES OF THE TARIM RIVER Numerical analysis of interspecific relationships in communities of Larix chinensis in Qinling Mountain Interspecific relationships of major species in Ammoden-dron argenteum communities of Takeermohuer Desert Ecological Species Groups of Wetland Vegetation on Lianbotan in Fen River, Shanxi