南京市城乡交错带景观格局研究

依据景观生态学理论，选取典型样区，在遥感和地理信息系统的支持下。分析了南京市城乡交错带的景观生态特征．结果表明。东部样区以景观多样性、优势度和破碎度较低为基本特征。林地等自然嵌块体的面积和平均周长较大，而平均分维数、平均伸长指数和分离度较低，菜地和水田嵌块体的平均面积也高于南部样区；南部样区景观多样性及优势度高，嵌块体数目多，景观破碎化较严重。居民点及工矿用地和水域的密度高、总面积及周长大。居民点及工矿用地和道路的平均面积也较高．探讨了两个样区嵌块体面积与分维数、嵌块体数目之间的关系，指出城乡交错带不同类型嵌块体景观特征及生态意义．

Landscape pattern of Nanjing urban-rural ecotone

Landscape ecological characteristics of the urban rural ecotone of Nanjing City were studied by using remote sensing and geographical information system (GIS) techniques. Two representative study regions with the same area were chosen in the eastern and southern part of the city. The urban rural fringe of both east (URFE) and south region (URFS) can be divided into three zones: fringe paraurban zone, transition zone and pararural zone. URFE was basically characterized by low landscape diversity, dominance and fragmentation. The forest patches in URFE had larger area and average perimeter, while their average fractal dimension, average stretched index and separated degree were lower. The average area of vegetable land and paddy land was larger than that of south region. URFS showed higher landscape diversity, dominance and fragmentation, more and higher density of patches. The area and the perimeter of water and architectural patches in URFS were also larger than that of URFE. The relationship between patch area and fractal dimension, stretched index and fractal dimension, patch number and area were discussed. The function and contributing factors of each type of patches, especially forestland, and the landscape characteristics and the ecological significance of corridors including road, river, and city wall of urban rural fringe were also analyzed.