基于土地利用格局的云南省福贡县生态脆弱度研究  

Study on the ecological vulnerability of the Fugong Country, Yunnan Province based on land-use pattern

作　　者：朱雪[1] 

机构地区：[1]无锡职业技术学院,无锡214000

出　　处：《生态科学》2012年第6期661-665,共5页Ecological Science

基　　金：国家自然科学基金(50648004)

摘　　要：福贡县位于滇西北横断山脉北段碧罗雪山和高黎贡山之间,云南省西北部是一个典型的生态脆弱带。本文从土地利用格局的角度分析区域生态脆弱度,选取分维数倒数、破碎度、分离度、土壤侵蚀敏感性和生境格局敏感性指数作为评价因子,探讨了福贡县生态脆弱度的分区规律。研究结果表明:土地利用类型生态脆弱度指数从高到低为:滩涂、城镇、耕地、荒草地、灌木林、有林地、水域。脆弱度分区的大致规律为,以福贡县城为中心,越往外围,脆弱度越低。在各脆弱等级区中,随着脆弱程度的上升,各区的分离度和破碎度指数呈上升趋势,土地利用格局趋于破碎化。Fugong County is located in the northern section of Hengduan Mountains,northwest Yunnan,between the northern section of the Biluo Snow Mountain and Gaoligong,and its ecological environment is very vulnerable.We analyzed the regional ecological vulnerability from the perspective of land-use pattern,using factors of splitting index,fractal dimension index,fragmentation index,soil erosion sensitivity index,and habitat pattern sensitivity index,and then explored the zoning law of ecological vulnerability.The results showed that vulnerability of eco-index of all land-use from maximum to minimum was in the order of beach land,town,farmland,grassland,bush land,forest land,and water.The law of region ecological vulnerability was the more peripheral to the Fugong County center,the lower vulnerability.In the 7 classes of region ecological vulnerability,the higher degree ecological vulnerability was,the more increasing the value of fragmentation index and separation index;meanwhile,land-use pattern tended to be fragmentation.

关 键 词：土地利用格局 生态脆弱度 福贡县 

分 类 号：Q149[生物学—生态学]