The status quo of China's forestry indicates that forestry development does not meet the requirement for maintaining ecological security. 林業現狀說明，林業發展與維護生態安全的要求極不適應。
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. 選擇了榆林市和橫山縣兩個行政單元，針對區域特徵，構建了不同尺度上的生態安全指標體系，利用層次分析法，對不同尺度上生態安全的空間分異進行了研究。
