五指山市林地生态脆弱性动态变化研究  

Dynamic Change Research on Ecological Vulnerability of Forestland in Wuzhishan City

作　　者：陆禹[1] 佘济云[1] 刘立武[1] 佘宇晨 

机构地区：[1]中南林业科技大学,长沙410000

出　　处：《林业资源管理》2015年第5期95-102,共8页Forest Resources Management

基　　金：国家林业行业公益性项目"南方集体林区次生林抚育间伐与高效利用技术研究"(201004032);海南省林业厅重点科研项目"海南省五大河流域植被恢复与保护研究"(LK20118478);湖南省"十二五"重点学科--森林经理学科资助项目(034-0014)

摘　　要：以五指山市林地为研究对象,利用AHP法、主成分分析法和GIS技术,从景观格局和生态敏感性相结合的角度对1998年、2003年、2007年和2012年五指山市林地生态脆弱性进行了动态研究。结果表明:1)2012年五指山市林地类型生态脆弱性为乔木经济林>桉树类>竹林类>灌木经济林>阔叶混>其他硬阔类>其他灌木林>针叶林。不脆弱区、轻度脆弱区、中度脆弱区、高度脆弱区和极度脆弱区面积占比依次为13.19%,18.47%,19.58%,23.02%和25.74%。2)1998—2012年五指山市林地类型的生态脆弱性先上升后稍有下降,人为干扰是林地生态脆弱性变化的主要驱动因素。3)五指山市林地生态脆弱性与聚合度指数极显著相关,与斑块密度和连接度指数显著相关,呈现"两极分化后趋于稳定,再迅速脆弱化"的发展趋势。4)地形地貌是影响五指山市林地生态脆弱性分布和变化的根源。In this paper, the forestland in Wuzhishan City was taken as a research subject and the AHP method,Principal Component Analysis and GIS technology were used for the dynamic research on the landscape pattern and ecological sensitivity to the forestland of Wuzhishan city in the years of 1998,2003, 2007 and 2012. The results showed that：l ） The ecological vulnerability of forestland types in 2012 was： economic forest 〉 Eucalyptus 〉 bamboo 〉 shrub economic category 〉 other shrub forest 〉 coniferous forest. The area forest 〉 broadleaf mixed forest 〉 other hardwood of forestland in terms of slight, light, moderate, heave and extreme vulnerability occupied 13.19% , 18.47% , 19. 58% ,23.02% and 25.74%. 2） The ecological vulnerability of forestland types in the city increased first and then slightly decreased during 1998 to 2012. Human disturbance is the main driving factor to this change in ecological vulnerability of forestland. 3 ） The ecological vulnerability of forestland in the city had a correlation with the degree of pol- ymerization, and had a significant correlation with patch density index and connection index. The variation trend of the ecological vulnerability of forestland is polarized first, become stable and then deteriorate rap- idly. 4） Topography is the source which affects the distribution and change of ecological vulnerability of forestland in the city.

关 键 词：林地 生态脆弱性 景观格局 动态变化 

分 类 号：S718.5[农业科学—林学] X826[环境科学与工程—环境工程]