An empirical research on the relationship between water environment and economic development in liaohe river watershed Spatial Variability of Soil DNA in China Fir and Masson Pine Mixed Forest in Three Gorger Reservoir Areas Multivariate regression analysis of greenhouse gas emissions associated with activities and populations of soil microbes in a double-rice paddy soil A comparison of multivariate regression tree and two-way indicator species analysis in plant community classification Plant species diversity and community classification in the southern Gurbantunggut Desert