为生态建设服务的吉林省西部景观类型研究*

在GIS技术支持下,依据有关原则,对吉林省西部景观类型进行了划分;选取地形和地貌、人类对景观的利用水平以及沙碱化程度三个指标对景观类型进行了稳定性评价。在此基础上,结合景观生态学的有关理论,采用类型重要值、嵌块体密度和平均内缘比率分析了吉林省西部各小区(东部区,中部区和西部区)内不同稳定类型的景观空间结构,提出了重建不稳定类型应以西部区为重点并要注意其内部结构的协调性、防止亚稳定类型向不稳定类型过渡也应以西部为重点、东部区的景观生态建设应注意增加其异质性等建议。

RESEARCH ON LANDSCAPE TYPES OF WEST JILIN FOR LANDSCAPE ECOLOGICAL CONSTRUCTION

Land desertification and land salinization are popular in West Jilin province, which is the major distribution area of deserted land in semi arid region of China. At present, human economic activities have destroyed the stability of sandy land ecological system. There exists obvious trends of environment degradation, such as drought, wind sand damage, salinization, etc. It is indispensable to conduct landscape ecological construction to resolve these problems. Supported by Geographic Information System (GIS), in this paper, 67 landscape types were classified according to some principles and their stability was assessed according to three indexes: ecological relief, human utilization level, and degree of desertification or salinization. Then, combining the about theories of landscape ecology and taking the three indexes of significant value of types, density of patches and average interior to edge ratio, the authors analyzed the landscape spatial structure of these types in the three regions (West Region, Middle Region, and East Region) in West Jilin. It can provide a scientific basis for local landscape ecological construction.