RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (09): 1568-1576.doi: 10.11870/cjlyzyyhj201509018

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Gradient analysis of the ecosystem service value in the chaohu lake-land ecotone

YAO Fei1, CHEN Long-qian1, ZHANG Yu1, WU Pei-yao1, ZHANG Hong-mei2, WANG Bing-yi1,2   

  1. 1. School of Environment Science and Spatial Informatics, CUMT, Xuzhou 221116, China;
    2. Anhui Provincial Institute of Land Surveying and Planning, Hefei 230601, China
  • Received:2014-12-08 Revised:2015-03-05 Online:2015-09-20
  • Contact: 陈龙乾,E-mail:chenlq@cumt.edu.cn E-mail:chenlq@cumt.edu.cn

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Abstract: Lake-land ecotone is a main type of ecological ecotone, which has an important role in reducing water on soil erosion degree, water conservation and water quality improvement and providing habitats for different creatures. In the Lake-land ecotone, human activities have a significant effect. Unreasonable way of production and living and land use, will destroy the ecosystem stability of the Lake-land ecotone, to make the ecological environment of itself and the affected area become fragile. Regarding the chaohu Lake-land ecotone as the research object, with the aid of remote sensing technology, we extracted land use data of the four periods in the study area. Based on the results of ecosystem service value research of Constanza, Xie gaodi and other scholars, we measured the value of ecosystem services in the study area, and used GIS spatial analysis and improved moving window method to study the ecological service value gradient change. Six windows were divided from the study area base on the land use data extract from remote sensing images in 1995, 2000, 2007 and 2013, which were 0-500 m, 500-1 000 m, 1 000-1 500 m, 1 500-2 000 m, 2 000-2 500 m and 2 500-3 000 m. We analyzed the gradient change of ecosystem service value among the different windows based on an improved moving window method. Results showed: (1) Cultivated land, forested land and water area make significant contribution to the ecosystem services value of the Chaohu lake-land ecotone. The contribution rate of various land use type had a consistent changing trend in different periods, and always had 1 or 2 land use types contributing significantly in every sub buffers. (2) The ecological service value of each window maintained a steady state from 1995 to 2013 except that suffer zone 1 to suffer zone 2 had a large change. (3) From 1995 to 2103, ecological service value of the buffer of suffer zone 1 was always highest one and the outermost sub buffer of suffer zone 6 had been at the medium level, the middle two at low levels, and suffer zone 5 & 6 from low level to mid-range excessive steadily. (4)A significant correlation between the contribution of forest land and waters ecological service value and the far of Chaohu water-land boundary, show that forest land and waters have obvious impact on the ecological service value in the study area.

Key words: land-lake ecotone, land use, ecosystem services value, gradient analysis, GIS&RS, Chaohu lake

CLC Number: 

  • F301.2
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