景电灌区土地利用景观格局变化研究  

Study on Landscape Pattern Influenced by Land Use Change in Jingtai Irrigation Area

作　　者：周兰萍[1] 胡小柯[1] 陈芳[1] 李亚[1] 魏怀东[1] 丁峰[1] 苏万红 

机构地区：[1]甘肃省治沙研究所甘肃省荒漠化防治重点实验室,甘肃兰州730070 [2]甘肃景泰治沙实验站,甘肃景泰730400

出　　处：《西南林学院学报》2011年第1期45-48,共4页Journal of Southwest Forestry College

基　　金：甘肃省荒漠化防治重点实验室开放基金(KD200801)资助;甘肃技术研究与开发专项计划(1004TCYA011)资助

摘　　要：在GIS、RS技术与景观格局分析软件FRAGSTATS支持下,采用多样性、优势度和均匀度等景观格局指数,分析景电灌区1987、1991、1999年和2003年土地利用景观格局变化。结果表明:土地利用类型总的变化趋势为草地、戈壁、沙地和盐碱地呈减少趋势;耕地、林地、居民点呈增加趋势,耕地的大幅度增加使得景电灌区的景观基质由1987年的戈壁和草地变为2003年的戈壁和耕地。耕地、戈壁、草地和沙地土地类型的平均斑块面积较大,林地、盐碱地和居民点等类型的平均斑块面积较小。随着人类对灌区的开发、建设和利用,景观优势度减少,景观多样性和景观均匀度有所增加。总体上各指数都与人为活动有很强的相关关系。Supported by the GIS, RS technology and FRAGSTATS software for landscape pattern analysis, the change of land use landscape pattern of the Jingtai irrigation area in the year 1987, 1991, 1999 and 2003 was analyzed individually by means of applying the landscape pattern indexes including diversity, dominance and uniformity. The results indicated that the general trend of land use types in the studied area was the decline of grassland, Gobi, sandy land, saline-alkaline land area, while increase of the cultivated land, woodland and residential areas. The substantial increase in cultivated land made the landscape matrix turned from the Gobi and grassland in 1987 into Gobi and cultivated/and in 2003. The average patch areas of the cultivated/and, Gobi, grassland and sandy land were relatively enlarged, whereas the average patch sizes of the forest land, saline-alkaline land and residential areas were reduced than before. With the exploitation, construction and utilization of land resource in the Jing- tai irrigation area, the landscape dominance was decreased but landscape diversity and landscape evenness were relatively increased. Generally speaking, there was a significant correlation between the change of each landscape index and the human activities.

关 键 词：土地利用 景观格局 景观指数 景电灌区 

分 类 号：S718.5[农业科学—林学]