摘要
通过1991、1999年和2007年LandsatTM3期遥感影像,在地理信息系统支持下,应用景观生态学原理与方法,进行图像解译和景观分类并计算景观指数,对北京西北部山地森林近16 a来的景观格局变化进行分析。结果表明:1991—2007年,林地始终是研究区的景观基质,前8 a林地面积减少,后8 a面积回升;各景观要素面积随时间的推移呈不同程度的增减,其中疏林地面积显著增加,灌木林地持续减少,疏林地空间扩展能力强;景观整体形状复杂,景观破碎化程度降低;景观异质性下降,景观组成分布逐渐不均匀,景观在多样性方面维持较差,建议加强首都森林生态管理和规划,合理地控制人为干扰。
A study on image interpretation, landscape classification and landscape index calculation was conducted by the principles and methods in landscape ecology and geographic information system, using the Landsat TM remote sensing images in 1991, 1999 and 2007 as basic data. The changes in landscape structure of the forests in the mountainous area in northwest of Beijing during 1991-2007 were analyzed. Results showed that the forestland was the landscape matrix, and the forestland area decreased during 1991-1999, but it increased during 1999-2007. The area of each landscape element increased or decreased to some extent as time went on. The area of the open woodland increased significantly, and that of the shrub land gradually decreased. It shows the strong ability of spatial expansion of the open woodland. The landscape shape was complex, the extent of landscape fragmentation reduced, the landscape heterogeneity decreased, and the landscape distribution gradually became uneven. Ecological management and planning of the forests in the study area should be strengthened due to the poor landscape diversity, and human interference should also be controlled reasonably.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2011年第7期50-53,共4页
Journal of Northeast Forestry University
基金
北京市重点学科建设项目
关键词
遥感分类
森林景观
景观格局
动态分析
Remote sensing classification
Forest landscape
Landscape patterns
Dynamic analysis
