基于GIS的永泰县森林景观格局特征研究

Study on forest landscape patterns based on GIS in Yongtai County

基于永泰县森林资源二类调查数据,利用GIS技术和景观生态学原理与方法,从斑块类型水平和景观水平选取景观指数分析研究永泰县森林景观格局特征。结果表明:①研究区林地景观面积为184433.02 hm^(2),占总面积的82.72%,其中乔木林地在林地景观类型中占明显优势,占林地景观面积的84.27%。②乔木景观平均斑块面积最大,破碎度最小;竹林地和宜林地的平均斑块面积最小,破碎度最大;乔木林地和竹林地斑块形状复杂,迹地的斑块形状简单;各类林地景观的聚集度高,均在90%以上。③研究区多由大的景观斑块构成,林地景观破碎程度较高,多样性较高,但林地景观分布不均匀。

Based on the second-class survey data of forest resources in Yongtai County,using GIS technology and landscape ecology principles and methods,the landscape index was selected from the patch type level and landscape level to analyze and study the characteristics of forest landscape patterns in Yongtai County.The results show that:①The area of forest in the study was 184433.02 hm^(2),accounting for 82.72%of the total area,of which the arbor forest land has a clear advantage in the forest land type,accounting for 84.27%of the forest land landscape area.②The average patch area of arbor landscape was the largest and the degree of fragmentation was the smallest;the average patch area of bamboo and suitable forest land was the smallest and the degree of fragmentation was the largest;the patch shapes of arbor and bamboo forest land were complex,and the patch shapes were simple;The concentration of woodland landscape was high,all above 90%.③The study area was mostly composed of large landscape patches.The woodland landscape was highly fragmented and highly diverse,but the woodland landscape was unevenly distributed.