广西金钟山国家级自然保护区景观破碎化分析

An Analysis of Landscape Fragmentation of Jinzhongshan National Nature Reserve

基于LANDSAT卫星图片及森林资源二类调查资料,运用地理信息系统软件ArcGIS 9.3及景观结构分析软件Fragstats 3.3,对广西金钟山黑颈长尾雉国家级自然保护区的景观格局和破碎化程度进行了分析。结果表明:研究地面积为38 716.6 hm2,共有斑块1 708个,包含11种景观类型。其中黑颈长尾雉的可栖息面积为29 552.3 hm2,占总面积的76.3%;7个景观指数均小于0.5,表明金钟山保护区的栖息地连接度低,破碎化较为严重;金钟山保护区内以阔叶林为基质,它们在控制景观整体结构、功能和动态过程中起着主导作用。因此,应当控制金钟山保护区已经出现的破碎化景观,并通过生境恢复和廊道重建等措施对黑颈长尾雉的栖息地进行保护。

The study is based on the data containing forest management inventory and the LANDSAT satellite images. The authors analyze the landscape patterns of Bar-tailed Pheasant＇s habitat in Jinzhongshan, northwestern Guangxi, using software ArcGIS 9.3 and Fragstats 3.3. The results show that Jinzhongshan covers 38 716.6 hm2, including 1 708 patches and 11 landscape types, while the proportion of suitable habitat for Bar-tailed Pheasant is about 76.3% of the overall landscape, involving 29 552.3 hm2. The connection degree of suitable habitat is low, 7 landscape indexes are all below 0.5. It implies the situation of fragmentation in Jinzhongshan habitat of bartailed Pheasant is rather critical. Broadleaved forest, considered to be the matrix in the reserve, is the dominant landscape type in controlling the overall structure, function sand dynamic changes. Consequently, all the departments concerned are supposed to endeavor to control the existing fragmentation, together with habitat-restoring and corridor rebuilding in the interest of the conservation of Bar - tailed Pheasant.