摘要
作为干旱半干旱区农牧交错带的典型代表 ,榆林地区在自然地理上有其独特的空间分布格局 ,在生态上具有显著的脆弱生境特征和演化规律。本文运用景观生态学的基本理论与方法 ,选取分维数、形状指数和景观优势度等指标 ,对该区脆弱环境的景观格局进行了分析 ,同时对诱发该区景观生态演化的因素进行了定量诊断 。
As the typical representative of mixed zone of agriculture and husbandry in arid and semi- arid region,Yulin Prefecture not only has its special spatial pattern in physical geography,butalso has typical characteristics of fragile ecosystem and differentiation rule in ecology.This paperapplied the basic theory and method of landscape ecology to analyze the landscape pattern of fragile environment in this area.The driving forces of ecological differentiation in this region are also identified quantitatively.At last the differentiation dynamics of landscape ecology in the regional ecosystem are studied.
出处
《地理研究》
CSCD
北大核心
2000年第1期30-36,共7页
Geographical Research
基金
国家自然科学基金!重点资助项目 (49731 0 2 0 )
关键词
土地利用
景观生态学
脆弱生态环境
榆林地区
fragile environment
land use and land cover change
landscape ecology
markov proces
