Gradient analysis and environmental interpretation of understory herb-layer communities in Xiaoshegou of Lingkong Mountain, Shanxi, China Ecological Gradient Analysis and Environmental Interpretation of Ulmus lamellosa Communities in the Taiyueshan Reserve, Shanxi Relationships between carbon source utilization of soil microbial communities and environmental factors in natural secondary forest in subtropical area, China Variability in phenotypic traits of the apple snail(Pomacea canaliculata, Ampullariidae) at different spatial scales