The status quo of China's forestry indicates that forestry development does not meet the requirement for maintaining ecological security. 林业现状说明，林业发展与维护生态安全的要求极不适应。
Yulin District and Hengshan County were taken as the cases, and ecological security index system was constructed to assess the security levels of the two regions. 选择了榆林市和横山县两个行政单元，针对区域特征，构建了不同尺度上的生态安全指标体系，利用层次分析法，对不同尺度上生态安全的空间分异进行了研究。
