摘要
以景观生态学理论为研究基础,以GIS为技术支撑,以2个时期的土地利用图为基本信息,将孟达自然保护区划分为耕地、草地、林地、灌木林地、水域和未利用土地6种景观类型,并从斑块数量、面积、分维数、形状指数、样性、优势度、破碎度、均匀度等角度对研究区景观的空间分布和结构特征进行了分析研究。结果表明:从1991年到2003年,孟达自然保护区土地景观空间格局发生了显著的变化;耕地、草地、水域、未利用地的面积、景观比例、平均斑块分维数、形状指数、优势度有所下降,灌木林地和林地有所增加;景观整体的多样性指数、均匀性指数和破碎度逐渐下降。土地利用景观格局向着林地和灌木林地的趋势发展,综合保护措施取得了明显的成效。
On the basis of landscape ecology theory,with the support of GIS techniques,using land-use maps of two different periods of Mengda Nature Reserve,the studied area was divided into 6 landscape types,including cultivated land,grassland,forestland,shrub land,water area and unused land.The characteristics of spatial distribution and structure of the reserve were investigated from aspects of patch number,area,patch fractal dimension,shape index,dominance,diversity index,uniformity index,landscape fragmentation.The results show that the landscape spatial pattern of Mengda Nature Reserve has changed significantly from year 1991 to year 2003;the area,landscape proportion,mean patch fractal dimension,the shape index and dominance of cultivated land,grassland,unused land and water decreased;but shrub land and forestland increased;the diversity index,uniformity index,landscape fragmentation of the whole landscape decreased gradually;the landscape spatial pattern showed a varied development tendency of shrub land and forestland,the obvious achievements were obtained due to the integrated protection measures.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2011年第12期65-69,共5页
Journal of Central South University of Forestry & Technology
基金
国家财政部项目"国家级自然保护区能力建设"(财建[2006]668号)
