Dynamics of species diversity and interspecific associations of herbaceous plants in a Pinus Tabulaeformis forest on a sandy site in Chifeng, China Environmental Interpretation of Variations on Forest Community and Understory Herbaceous in Taibai Mountain,Shaanxi,China Effects of forest gap on herbaceous plant diversity in mixed birch-fir forest of Taibai Mountain. Distribution patterns of alien herbs in the Yiluo River basin