大熊山国有林场生态敏感性研究

Study on Ecological Sensitivity of Daxiong Mountain State-owned Forest Farm

通过筛选大熊山国有林场生态敏感性评价指标,以及采用Arc GIS重分类,将重分类的数据用空间主成分分析法确定大熊山国有林场生态敏感性各指标的权重,得到各指标最终权重值的排序为:林分类型>海拔>坡位>龄组>郁闭度>坡度>坡向>土壤类型;对各生态敏感性评价因子用空间分析工具进行加权叠加处理,进而得到大熊山国有林场生态敏感性的空间趋势:西部、西北、东北以及中部偏高;南部、东部、西南和东南偏低;通过统计林场不同生态等级面积,按从大到小的排列顺序为轻度敏感区>中度敏感区>高度敏感区>不敏感区>极度敏感区,总体来说大熊山国有林场的生态敏感程度较小。

By using the ArcGIS reclassification data, the weights of the indexes of ecological sensitivity of Daxiong Mountain State-owned Forest Farm were determined by spatial principal component analysis （PCA）. The final weight values of each index were sorted by ： forest type 〉 elevation 〉 slope position 〉 age group 〉 canopy closure 〉 slope degree 〉 slope direction 〉 soil type. In the west, northwest, northeast and middle areas of the of Daxiong Mountain State-owned Forest Farm, the spatial ecological sensitivity were higher than those in the south, east, southwest and southeast areas. By means of statistical ecological diversity of different forest areas, according to the order of from the large to the mild, Daxiong Mountain State-owned Forest Farm was divided into ： sensitive area 〉 moderate sensitive area 〉 highly sensitive area 〉 insensitive area 〉 extreme sensitive area, in general, the ecological sensitivity of the Daxiong Mountain State Forest Farm was low.