摘要
This study aimed to provide theoretical bases for optimized land use in minority settlements at high altitude. On the basis of forest form map and land use type map (1∶250 000) of Ganzi Tibetan Autonomous Prefecture in Sichuan Province in 2007, this study carried out further analysis and assessment on the landscape pattern and fragmentation degree of Ganzi from the perspective of overall landscape characteristics, area and perimeter of patches, quantity and fractal dimension of patches and so on with the support of geo-info systematical software ArcCIS and landscape structure analysis software Fragstats. The results showed that among all landscape elements alpine meadow and evergreen broad-leaved shrubs take up a larger part as temperate and cool temperate grassland and marsh are scattered with small areas; deciduous and broad-leaved as well as their mixed forest have higher landscape fragmentation degree, on the whole, the fragmentation degree of forest type is higher than that of meadow and shrub; fractal dimensions of landscape components are all small and tend to 1, which indicates that the folded degree of all landscape boundaries are small.
1研究区域与方法1.1自然概况甘孜藏族自治州,位于四川省西部,青藏高原东南缘,青藏高原向四川盆地过渡地带,长江、黄河的源头地区。地形地貌复杂,全州辖康定、泸定、丹巴、九龙、雅江、道孚、炉霍、甘孜、新龙、德格、白玉、石渠、色达、理塘、巴塘、乡城、稻城、得荣18个县,面积15.3万km2。地理坐标:东经97°22’～102°29’,北纬27°58’～34°20’。地势由西北向东南倾斜,地面平均海拔3500m。5000m以上地域终年积雪,最高峰贡嘎山7556m。
基金
国家林业局科技支撑计划(2006BAD03A02044)~~
