[1]LIU Di,CHEN Hai,ZHANG Hang,et al.Assessment of Land Ecosystem Health of Loess Erosion Valley—A Case Study of Dujiashi Valley[J].Research of Soil and Water Conservation,2019,26(02):100-106.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
100-106
Column:
Public date:
2019-04-28
- Title:
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Assessment of Land Ecosystem Health of Loess Erosion Valley—A Case Study of Dujiashi Valley
- Author(s):
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LIU Di1,2, CHEN Hai1,2, ZHANG Hang1,2, MAO Nanzhao1,2, LIANG Xiaoying1,2
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1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China;
2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, China
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- Keywords:
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land ecosystem health; PSR model; spatial differentiation; terrain relief; Dujiashi Valley
- CLC:
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X171.4
- DOI:
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- Abstract:
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The ecosystem health is considered to be the ultimate goal of environmental management, and it is of great significance to explore the sustainable development of regional ecological system. Taking Dujiashi Valley of Mizhi County, Shaanxi Province in the loess hilly-gully region as research area, we constructed a multi-indices evaluation system to investigate ecosystem health based on the Pressure-State-Response (PSR) model. The spatial differentiation of the ecosystem health of Dujiashi Gully was analyzed, and the relationship between ecosystem health and geographical environment was explored by the terrain relief and its distribution index. The conclusions were drawn as the followings. (1) Spatial differentiation of the comprehensive ecosystem health of Dujiashi Valley was significant. The region with high value of ecosystem health distributed in the hills and the marginal gully area, which accounted for 27.02% of the study area; meanwhile, the region with low value of ecosystem health distributed in the central gully and its secondary erosion gully of middle and eastern gully and its extend area, which made up 33.37% of the study area and should be the focus of landscape pattern regulation and ecological restoration. (2) Ecosystem health was closely related to terrain relief. With the rising of relief, the pressure of human activities decreased. At the same time, this process had an impact on the change of regional productivity, landscape structure and habitat quality, finally affected the spatial differentiation of land ecosystem health degree.