Landscape Dynamics and Driving Factors in Da’an County of Jilin Province in Northeast China During 1956-2000

编号 zgly0001582096

文献类型 期刊论文

文献题名 Landscape Dynamics and Driving Factors in Da’an County of Jilin Province in Northeast China During 1956-2000

母体文献 Chinese Geographical Science 

年卷期 2008年02期

年份 2008 

分类号 P942 

关键词 landscapeevolution  landusechange  saline-alkaliland  Da’anCounty  NortheastChina 

文摘内容 The landscape pattern of Da’an County, Northeast China has undergone significant changes since the 1950s as a result of climatic change and human activities. The aim of this paper is to quantitatively study landscape pattern and its spatial dynamics of Da’an County at the landscape level over the nearly 50-year span. Patch dynamics were examined ac-cording to land use and land cover change processes built from a series of images, as well as topographic maps, and tem-poral patterns built from landscape pattern metrics. The transition matrix of landscape patch types and changes of various landscape metrics were applied. The results showed that, from 1956 to 2000, the landscape within the study area had un-dertaken a complicated evolution in landscape structure and composition. The outstanding characteristic is that sa-line-alkali land increased and grassland decreased. As some smaller patches amalgamated, the heterogeneity of patch de-creased. All those changes were the synthetic result of both climatic and anthropogenic influences, but the predominant factor was different in different parts. In the southern part of the study area, the landscape pattern changes resulted from the modification of climate obviously, while in the northern part, the landscape pattern changes were mainly caused by human activities, such as the conversion between farmland and saline-alkali land. This phenomenon showed that human activities played more important role in the north than in the south of Da’an County.