浑河太子河流域景观变化及其驱动力

Landscape change and its driving forces in Hun-Tai river basin

利用GIS、RS技术、景观生态学方法和Logistic回归方法,分析了浑河太子河流域1988—2004年景观变化及驱动力。结果表明:浑河太子河流域的主要景观类型为林地、灌木林、旱地和水田,研究区的景观格局在研究时间内发生了较大的变化,旱地、水田面积减少,而有林地、水域、农村居民点和城镇的面积增加,灌木林面积变化不大;在景观水平上,研究区内景观异质性在增加,破碎化越来越大,景观中斑块的空间连接性下降,优势度在减少,景观类型向多样化和均匀化方向发展;研究区内不同景观类型变化的主导驱动力各不相同,社会因子在景观变化中有一定的作用,但生物物理因子及部分邻域因子在景观变化中所起的作用仍不能忽视。

Based on the GIS/RS techniques and the methods of landscape ecology and Logistic regression, this paper analyzed the landscape change and its driving forces in Hun-Tai river basin from 1988 to 2004. The main landscape types in the fiver basin were forestland, shrub land, dry land, and rice field, but the landscape pattern changed greatly during the study period. The dry land and rice field decreased, forestland, water area, shrub land changed slightly. At landscape level, the increased, while the patch spatial connectedness and and rural and urban areas increased, while landscape heterogeneity and fragmentation landscape dominance decreased. The driving forces of the landscape change varied widely, among which, socio-economic forces played an important role, but the effect of natural forces could not be ignored.