摘要
依据景观生态学理论和研究方法，运用遥感和地理信息系统技术，对粤西南华农场３个时期土地利用与景观格局进行了分析与评价。结果表明，不同时期生产性用地中，斑块类型、斑块数目与面积变化较大。７０年代，景观优势度较高，多样性和均匀性较低；８０年代，随斑块类型和斑块数量的增加，景观多样性、均匀性显著增加，破碎化指数增大，景观格局发生较大变化；９０年代，一些斑块类型逐渐消失，景观优势度、多样性和均匀性较８０年代有所下降，斑块密度和破碎化指数已降至接近７０年代水平。从景观格局动态变化的时序特征看，市场及经济发展政策的倾向性是导致景观格局阶段性变化的根源。
Changing pattern of land/land cover were studied in Nanhua State Farm in the southern China from 1972 through 1995.Land cover maps of three periods (1972,1985,1995) with scale of 1∶20 000,derived from aerial photographs and field surveys,were collected.Land cover categories (or patch types) were digitized by using digital instrument with the assistant of Geographic Information System (GIS).Landscape patterns were quantified by using some indices and measures.Patch types and numbers were increased from 1972 to 1985,then declined form 1985 to 1995.Higher dominance and lower diversity and evenness characterized the landscape spatial pattern in 1972.In 1985,landscape pattern was greatly changed with high diversity and fragmentation.Up to 1995,some patch types has disappeared,and the declining trend of diversity and dominance displayed. By quantifying the spatial and temporal patterns of land cover change,an attempt was made to show how the landscape in rural area was controlled by social and economic development strategies.
出处
《林业科学研究》
CSCD
北大核心
1999年第6期599-605,共7页
Forest Research
基金
中国林业科学研究院(CAF)基金!(1997~1999年)(9786121)
IDRC-CIFOR与CAF合作项目!(1995~1
