西藏林芝地区景观生态格局分析

应用景观生态学原理和方法,利用遥感技术和地理信息系统,结合森林资源二类调查,在ARC/INFO支持下,对西藏林芝地区的景观格局与空间异质性作了定量描述。结果表明:林芝地区共划分为14个景观要素类型,形成以自然景观、半自然景观和管理景观为主的生态空间格局。其中:自然景观保持着较好的原始状态;半自然景观受干扰的程度最重、景观破碎强烈;其次为管理景观。这反映出林芝地区生态环境退化的趋势。

Analyses on the Landscape Ecotypes of Linzhi Prefecture in Tibet

Based on the results of the management inventory of forest resources and using the ARC/INFO software technologies,this paper describes quantitatively landscape patterns and spacial nature differences within the area of the Linzhi Prefecture of Tibet. The results show that landscape ecotypes of the Linzhi Prefecture could be classified into fourteen types of the landscape factors,and the main ecological space pattern is composed of natural landscapes,semi-natural landscapes and management landscapes. The results of landscape difference analysis show that natural landscapes maintain good original states,and extents of disturbances to the semi-natural landscapes are the heaviest and the brokenness of the semi-natural landscapes are the most violent,followed by management landscapes. The results reflect that ecological environments of the Linzhi Prefecture tend to retrograde.