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中国西部生态脆弱地区景观生态位的时空差异——以陕北延安地区为例(英文)
编号
zgly0001586656
文献类型
期刊论文
文献题名
中国西部生态脆弱地区景观生态位的时空差异——以陕北延安地区为例(英文)
作者单位
CollegeofTourismandEnvironmentalSciencesShaanxiNormalUniversity
CollegeofTourismandEnvironmentalSciencesShaanxiNormalUniversity
Xi’an710062China
母体文献
Journal of Geographical Sciences
年卷期
2007年04期
年份
2007
分类号
P901
关键词
Yan’anregion
landscapeecologicalniche
spatio-temporaldifferentiation
文摘内容
In this study, we attempt to put forward a conception of landscape ecological niche, enlightened by international scholars on extending the ecological niche theory from spatial niche to functional niche. That is helpful for comprehensively appraising landscape spatial patterns and ecological functions, also, presents a new method for analyzing landscape features from multidimensional aspects. The practice process is demonstrated by taking Yan’an region in northwestern China as a case. Firstly, the indices system including spatial attribute and functional attribute is established for assessing landscape ecological niche. Additionally, two-dimensional figures are drawn for comparing the spatio-temporal features of landscape ecological niche in 1987 and 2000 among the 13 administrative counties. The results show that from 1987 to 2000, towards Yan’an region, spatial attribute value of landscape ecological niche changes from 1.000 to 1.178 with an obvious increment, and functional attribute value changes from 0.989 to 1.069 with a little increment, both of which enhance the regional landscape ecological niche. Towards each county, spatial attribute value of landscape ecological niche increases to different extent while functional attribute value changes dissimilarly with an increment or a decrement.