ecological fragility 第1页

ECOLOGICAL FRAGILITY OF AND FORESTRY STRATEGIES FOR HEILONGJIANG BASIN Evaluation of exploitation suitability of unutilized arable lands in ecologically fragile areas — A case study of Datong City, Shanxi Province Ecological fragility of wetlands in Sanjiang Plain DESIGN AND MANAGEMENT OF ISLAND MARINE PROTECTED AREAS(IMPA):A THEORETICAL AND CASE STUDY Research on regionalization of economic types of eco-agriculture in Shanxi Province