Analysis of the dynamics and characteristics of grain filling in summer maize under waterlogging stress Factors influencing Mikania micrantha invasion and distribution at regional scale The spatial distribution of constructive species of Northeast forest under the climate changing Selection of Microhabitat of Carabid Beetles (Coleoptera:Carabidae) in Different Ecological Restored Habitats in the Hilly and Gully Area of Loess Plateau, Ningxia, China