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[1]FENG Jianmin,GUO Lingxia,LI Xiaohua.Analysis of Ecological Vulnerability in Yuyang District Based on Landscape Pattern[J].Research of Soil and Water Conservation,2016,23(06):179-184.

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Analysis of Ecological Vulnerability in Yuyang District Based on Landscape Pattern

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 06 Page number: 179-184 Column: Public date: 2016-12-28

Title:: Analysis of Ecological Vulnerability in Yuyang District Based on Landscape Pattern

Author(s):: FENG Jianmin, GUO Lingxia, LI Xiaohua; College of Resources & Environment and Historical Culture, Xianyang Normal University, Xianyang, Shaanxi 712000, China

Keywords:: landscape pattern; ecological vulnerability; Yuyang District

CLC:: X826

DOI:: -

Abstract:: In order to quantitatively assess the spatial difference of ecological vulnerability in the Yuyang District of Northern Shaanxi Province, and provide a support for land use planning and environmental projection, an assessment index system was developed from the aspects of ecological supporting pressure, ecosystem sensitivity, and ecological resilience by using landscape fractal dimension, fragmentation, dominance, connectivity, human disturbance intensity, adjacency degrees of landscape with wasteland and topographic index. Then according to the distribution characteristics of rural landscape, the map of ecological vulnerability distribution was made, and spatial difference of the ecological vulnerability was analyzed and assessed. The results showed that:(1) among the various types of ecosystems, water body had the highest ecological vulnerability, followed by the grassland and woodland, while the farmland had the lowest one, with the values of 0.319 3, 0.095 9, 0.068 4 and 0.047 4, respectively; (2) among the entire 24 towns, Xiaojihan, Yuyang, Yuhe and Yuhemao had the highest ecological vulnerability, while Chaheze had the lowest one, with the values of 0.056 6, 0.058 8, 0.057 5, 0.059 9 and 0.019 8, respectively; (3) ecological vulnerability appeared gradually weakening trend from central section to east and west. In the three landform patterns, the southern loess hilly-gully region had the highest ecological vulnerability, followed by the central transition area and northern wind-sandy grass shoal area. The dominant factors affecting the spatial pattern of the regional ecological vulnerability were land use pattern and topography, whereas the major factors inducing spatial heterogeneity of ecological vulnerability were human disturbances such as mining and settlement. In the following land resources exploitation and utilization, more attention should be paid to reduce the disturbance of human activities on the ecological systems, and protect landscape with high vulnerability such as woodland and grassland, thus reduce the vulnerability of the regional ecosystem.

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