Minqin Oasis Of Land Use Change And Ecosystem Service Value Spatio-temporal Pattern Study

Located in the downstream of shiyang river basin in minqin oasis in the desert oasis is typical for the region ecological environment, land use change and ecological service value research has certain theoretical significance and practical needs. This article selects mainly desert oasis minqin county as the research area, through to the Landsat remote sensing image interpretation, the 2009 acquired the land use of the available data, further in 1960,1985,1991, the 1995 and 2000 and 2002, through the data of land use GIS spatial analysis and statistical techniques, discusses the minqin oasis in nearly 50 years of land use and land use ecological service value based on the space-time structure. The results are as follows:(1) minqin arable land in are the main land use types, forest land, meadow also have considerable proportion. Overall, this area ratio of cultivated land (43%-75%) maximum for grass:second (6%-13%):did not use the land (from 41.11% to 12%of 2009); Woodland (6%-13%); City workers civil (0.75%-3.25%just);(2) whole, the study area cultivated land area 1960 to 1985 present trend, and 1985 to 1991 dropped,1995 until 2009 is slowly reduced; In the 1960s and 1985 forest area, present growth between 1985 and 2000 trend in 2000 to reduce trend, sustained growth in 2009; In the 1960s and 1980 the lawn for down trend, 1980 to 1991 a growing trend,1991 to 1995 and dropped,1995 to 2000 grassland area shows ascendant trend,2000 to 2002 appear small drop,2002 to 2009 and a growing trend; Unused land area in the 1960s and 1985 appeared to decline between 1985 and 1991, while increasing between 1991 and 1995 and decline between 1995 and 2002, small growth, appear continues in 2002 to 2009 decline; Urban residents from 1960 to land area for the decline in 1985,1985 to 2000 for growth trend,2000 to 2002 for down trend, from 2002 to 2009 appeared trace growth;(3) research of ecological service value change is divided into three types: linear growth, fluctuation change type and linear recession type. Ecological service value linear growth mainly appear in minqin oasis, accounting for most of the research area in central area (approximately 60%), nearly includes all the administrative township; minqin county Ecological service value of linear recession are mainly concentrated in minqin county area around and study area of the local area in the lake district of northern; Ecological service value fluctuations in minqin oasis edge type appear that minqin oasis of land use changes caused by ecological service value more volatile.(4) research area ecological service value by the changing trend of types of land use change. Among them is woodland plays a leading role, and cultivated land, grassland times the influence of unused land minimum.