| [numerical analysis on ecological gradient of plant communities in donggou catchment, hebei province, china]. | based on dcca-oac, the plant communities in donggou catchment, bashang region, hebei province, were classified into 8 types of community. the environmental gradient, structural gradient and human-disturbance could be well expressed in the ordination plot. axis 1 reflected the spatial pattern of plant communities along the gradient of altitude and slope, while axis 2 showed the plant community distribution on different aspects. the plant communities showed a distribution gradient along moisture g ... | 2004 | 15320397 |