水土保持研究2011，Vol.18Issue(3)：78-82,87,6.
基于景观格局和生态敏感性的左江流域生态脆弱性分析
Analysis of Ecological Vulnerability in Zuojiang River Basin Based on Landscape Pattern and Ecosystem Sensitivity
摘要
Abstract
The ecological vulnerability of Zuojiang river basin was assessed using a combined landscape pattern and ecological sensitivity approach. The landscape indices and ecological sensitivity indices are developed by using the landscape isolation, fractal dimension, fragmentation, sensitivity of soil erosion, and sensitivity of karst rock. The network covering the whole study area is used to sample and geostatistics interpolate the spatial vulnerability of ecology, thus, the map of vulnerability distribution of the ecological vulnerability is derived, and the ecological vulnerability is analyzed and assessed. The results showed that: (1)The semi-variogram analysis showed that the regional ecological vulnerability had a relatively good spatial correlation in the study area, the ratio of Nugget and Partial Still is 65. 34％. The spatial variability of the region was in an obvious isotropy within 16 km, but existed distinct anisotropy character outside 16 km; (2)There is a good agreement between the predicted and actual distribution of regional ecological vulnerability. The regional vulnerability index was higher in south area than that in north, the higher degree of vulnerability matches with the distribution of carbonate. Geology and geomorphology are the dominant factors affecting the spatial pattern of the regional ecological vulnerability, and human activities are the major factors inducing spatial heterogeneity of ecological vulnerability.关键词
景观格局/生态敏感性/生态脆弱性/左江流域Key words
landscape pattern/ ecological vulnerability/ ecological vulnerability/ Zuojiang river basin分类
资源环境引用本文复制引用
卢远,苏文静,华璀..基于景观格局和生态敏感性的左江流域生态脆弱性分析[J].水土保持研究,2011,18(3):78-82,87,6.基金项目
国家自然科学基金(40761027) （40761027）
