Study Of Landscape Dynamics On Urban-rural Ecotone In Changchun During Urbanization Process

Landscape changes are the results of impacts both from natural factors and humanactivities. With the enhancement of human activities, they play greater role in the landscapechanging process in some areas. Urban-rural ecotone is the transition area between city andrural, and effects of human activities are especially great in this area. While landscapechanges are very great, unreasonable landscape pattern is one of the reasons for producingecological problems. Therefore, it is necessary to find out the mechanism of landscapechanges during urbanization process in urban-rural ecotone, which can supplys reference forus to improve landscape pattern, and may provides argumentation for sustainabledevelopment of the city.According to Remote Sensing images, topographic and land use maps, based on thetechniques of Remote Sensing (RS) and Geographic Information System (GIS), this paperstudyed landscape changes of the studying region. The conclusions were drawn as followed: (1)Taking 3S techniques as basic means, we can establish landscape database of thestudying region, then rebuild spatial and temporal changing process of urban-rural ecotone,and carry on long-term monitoring and analysises of landscape changing process. (2) While landscape matrix was non-construction landscape 23 years ago, the studyingregion has transformed to urban landscape in which construction landscape being dominant.The development of urban-rural ecotone can divided into three stages: early, middle and laterstages of urbanization process. (3)In the early stage of urbanization process, the quantity transformed fromnon-construction landscape to construction landscape is the least of the three stages;in themiddle stage, the quantity is the largest;in the later stage, the area decreased, however, it isstill larger than the early stage. Construction landscape mainly expanded along urban area andboth sides of roads. (4) In the early stage of urbanization process, landscape shape was complicated andlandscape diversity was relatively low in the studying region, while landscape fragmentationand contagion were at higher level;in the middle stage, landscape fragmentation andcontagion decreased, landscape shape became more regular, and landscape diversity reached ahigher level;in the later stage, contagion of the whole landscape went up, landscapefragmentation declined to a lower level, landscape diversity also descended and lower thanthe early stage, and landscape shape became relative regular.