Feng Tongzhai National Nature Reserve Land Use/Cover Change Analysis And Ecological Effects

Land use/cover change is one of the ten core topics of landscape ecology.Land use/cover change is the result of mutual interference and interaction of various factors in landscape spatial pattern.This study was based on Gis and Fragstats landscape pattern software to study land use/cover changes in Fengtongzhai National Nature Reserve.research shows:1)The spatial pattern of Fengtongzhai National Nature Reserve is dominated by woodland patches and grass patches.The degree of landscape fragmentation is low.The landscape spatial pattern of the area is clustered,and the patches affected by human activities such as residential buildings Plaques,plaques in industrial and mining sites,etc.,are more serious in the assimilation of plaques.According to the results of land use classification,the types of patches in protected areas were: grass patches,wood land patches,water patches,industrial land patches,residential patches,plough patches,and other land use patches.2)Patches of forest land and grassland showed natural irregularities,with significant differences in plaque size,little difference between patches of the same type,no obvious phenomenon of patch assimilation and high degree of landscape dominance.The characteristics of patch types in the area show that land types of forest land and grass patch areas are transferred to land types such as industrial and mining land and cultivated land.3)There are significant regional differences in the spatial distribution of plaque types under human disturbance.Affected by the elevation and soil texture,the arable land is mainly distributed on both sides of the river valley and around the residential area.The grassland is mainly distributed in the protected area above 3500 m above sea level and under the forest.Forest land is the core category of protected areas and is evenly distributed in protected areas.Residential and arable land are widely distributed on both sides of the highway.The landscape pattern presents the trend of housing,arable land,and industrial and mining land distributed on a residential basis.4)In the past 20 years,the area of industrial and mining land,water areas,cultivated land,and housing in protected areas has increased significantly,and the increase in other land uses has also been relatively large.The area of wood land and grassland decreased the most,and the overall structure changed greatly.Grassland and forest land are affected by geological disasters and human activities.The extent of patch fragmentation changes greatly.The main reason is that some grasslands and forest lands are reclaimed as cultivated land,and the edge effects of forest and grassland patches are reduced.Patch assimilation will cause the marginal isolation of adjacent forest lands and grassland ecosystems and exposure to other ecosystems.