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[1]SHEN Jian-xiu,WANG Xiu-hong,LIU Yu,et al.Spatio-temporal Changes of Ecosystem Service Value in Zhengning County, Gansu Province before and after the ‘Grain-for-Green’ Policy[J].Research of Soil and Water Conservation,2012,19(04):59-64.

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Spatio-temporal Changes of Ecosystem Service Value in Zhengning County, Gansu Province before and after the ‘Grain-for-Green’ Policy

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 04 Page number: 59-64 Column: Public date: 2012-08-20

Title:: Spatio-temporal Changes of Ecosystem Service Value in Zhengning County, Gansu Province before and after the ‘Grain-for-Green’ Policy

Author(s):: SHEN Jian-xiu^1,2, WANG Xiu-hong¹, LIU Yu^1,2, ZHANG Wei^3,4, YAO Li-na^1,2; 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
2. Graduate University of Chinese Academy Sciences, Beijing 100049, China;
3. Institute of Remote Sensing and Earth Sciences, College of Science, Hangzhou Normal University, Hangzhou 311121, China;
4. Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, Hangzhou 311121, China

Keywords:: land use change; ecosystem service value; gravity center movement; ‘Grain-for-Green’ Policy; Zhengning County of Gansu Province

CLC:: F301.21

DOI:: -

Abstract:: With remote sensing and geographic information system techniques for data acquisition and processing, this paper choosed Zhengning County, which was located in the loess gully area of northwest China as a case study, and examined the Spatio-temporal changes in ecosystem service value before and after the ‘Grain-for-Green’ Policy based on the framework of ecosystem service value evaluation proposed by Costanza and gravity center movement model. The results showed that: (1) the total area of forest decreased from 1995 to 2000, but it increased from 2000 to 2010. Cropland and water body area were keeping decreased, meanwhile, construction land was keeping increas during the study period; (2) the total value of ecosystem services for the study area decreased by 6.512% from 1995 to 2000 and then increased by 29.369% from 2000 to 2010. The increase of forest ESV was considerable after the ‘Grain-for-Green’ Policy. Main ecosystem service functions in Zhengning County include biodiversity protection and soil formation. The appreciable increase of ESV for each ecosystem service function after the ‘Grain-for-Green’ Policy was a clear reflection of regional sustainable land use; (3) the total ESV gravity centers of Zhengning County had a spatial trace direction to southeast from 1995 to 2010. This result indicated that the spatial distribution of ESV per unit area for the study area was not even. In order to promote and balance the distribution of function of ecosystem service in Zhengning County, this paper suggested that policy-makers should pay greater attention to adjusting and optimizing land use structures in west and middle part of this study area.

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