吉林省西部景观格局动态及驱动机制

Landscape pattern change and driving mechanism in western Jilin Province

以1990,2000,2013年3期Landsat遥感影像解译结果为基础,基于景观生态学原理与方法,从景观破碎度、形状指数、聚集度和多样性角度计算格局指数,并从自然和人文因素分析吉林省西部景观格局动态变化及其驱动机制.结果表明,1990—2013年,研究区景观格局破碎程度和分维数降低,且变化幅度较小,景观要素复杂程度减弱但其信息含量和信息差异性增加;从其影响因素来看,人口增长、经济发展和政策导向为该区景观格局变化的主要驱动力,而自然条件对该区景观格局动态变化的影响相对较小.

The data source comes from three periods of TM remotely sensed data in year 1990,2000 and 2013.It calculates the landscape pattern index,analyzing the index from reduction range,shapes index,crowding level and diversity by using the theory and method of landscape ecological,and revealing the dynamic changes of landscape ecology and its driving factors in western Jilin Province which combines with natural and human factors.It turns out that from 1990 to 2013 the fragmentation degree of landscape pattern has decreased,and the fractal dimension reduced with small change range in the study area.The complexity of landscape elements decreased,but the information content and information difference increased.From the perspective of its influencing factors,population growth,economic development,policy guidance worked as the main driving forces of the changes in the study area.Meanwhile,natural environment has some small impact on the landscape pattern changes in that region.