The Duolun During The Ecological Construction Of Landscape Pattenr Dynamics Of The Duolun

Duolun located Hunshandake sand southeast side, Are ecologicallyfragile zone. In North China in particular is an important part of theBeijing-Tianjin ecological barrier, the development of ecologicalenvironment merits of a direct relationship to the surrounding area. TheDuolun which is the agriculture and animal husbandry, animal husbandry,the main binding site, drought, sandstorm larger. In recent decades, Dueto population increase, overgrazing, uncontrolled long-term effects ofcultivated grasses and grain, and other unreasonable human activities,Increasing the environmental problems of land desertification,desertification, soil erosion, water erosion, wind erosion hazards,Therefore, in order to prevent the environmental problems of the Duolundesertification, desertification and soil erosion, Duolun from the2000implementation of the ecological construction.Duolun2000,2005, three remote sensing images in2009as thebasic data, the use of digital data through the landscape indicesquantitative analysis of landscape pattern and the dynamic characteristicsof the past nine years, combined with ecological constructiontheimplementation of the actual situation, revealing the role of ecologicalconstruction projects in the study area landscape pattern change. Themain conclusions are as follows:⑴The situations in2000to2oo9changed in the composition, butthe trend among the landscape types and different degrees。The number ofpatches, patch shape, the degree of fragmentation, landscape diversity ofthe study area, to varying degrees, the main driving as a result of humandamages. Landscape to reduce the overall degree of fragmentation, thedegree of landscape heterogeneity and landscape diversity decreased thelandscape types in the proportion of differences increase, and unevendevelopment, evenness decreased, Landscape patch shape complexity of the decline.⑵The study area landscape type is the type of landscape pattern ofarable land, grassland landscape type, woodland landscape types anddesert landscape, and other patches, such as the type of water landscape,residential landscape types and wetlands landscape types embedded inthem. Among them, the Beijing-Tianjin Sandstorm Source ControlProject and Hunshandake southern margin of the project with governanceDistrict sand dominant Returning Farmland to Forest and Grassland areacultivated landscape types and grassland landscape types commondominant, while the grazing round feed engineering and ecologicalmigration project grass dominant. The major landscape changes whilegrassland, arable land, the increase in woodland three landscape types andsandy landscape types to reduce the main the most significant increase ingrass landscape types. The development of the study area landscape typeto the non-uniform direction, indicating that further increase theproportion of differences between the various landscape types within theregion.⑶After nine years of ecological construction, forest and grasslandproject area ecological construction, implementing the most obviousbenefits, effectiveness Hunshandake sandy southern edge of bandgovernance project area no other project area is obvious. Beijing-TianjinSandstorm Source Control Project area, grazing feeding project area,ecological migration project area and four basis points in the constructionproject area in the project area were similar efficiency.