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Xu B.,Huangzhong Normal University | Zhou Y.,Huangzhong Normal University | Xu L.,Huangzhong Normal University | Yu L.,Huangzhong Normal University | Wu W.,Chinese Academy of Agricultural Sciences
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011

In order to reveal the spatial distribution characteristics of ecosystem service value on county scale, this paper carries on the land classification of QianJiang City by making use of the multispectral remote sensing image in 2009 of CBERS- 02B. And RS/GIS techniques, the paper calculates the ecosystem service value of QianJiang City in 2009, analyzes the spatial autocorrelation and local spatial autocorrelation of ecosystem service value of every sampling point and conducts the semi-variable analysis, model simulation and spatial interpolation. The result indicates that firstly, the overall ecosystem service value of QianJiang City is 1. 903 billion yuan in 2009, of which cultivated land and waters make up the main part, respectively accounting for 47. 15% and 43. 75%. Secondly, the intensity of ecosystem service value on county scale appears obvious overall positive correlation, though the correlation coefficient decreases with increasing distance, which presents significantly positive correlation in 12 km, negative correlation between 12 and 26 km and no correlation 26 km away(P <0. 05). Thirdly, the local spatial autocorrelation analysis shows a high-high aggregation and two low-low aggregations (P<0.05). The high-high aggregation is mainly distributed in the southwest of the city while the two low-low aggregations are mainly distributed in north-central and east area. Lastly, the analyzing result of semi-variable function is C 0 = 0.005, C 0 + C = 0.447, a = 1. 68km, which indicates that the data has a strong spatial autocorrelation. By Kriging interpolation we find out that the ecosystem service value declines from extremely high value in southwest area to low value in northeast area, displaying a diffusion pattern that takes the southwest to northeast as the main axis. In general, the analysis results of the study area's ecosystem service value accord with the natural condition and economic development in QianJiang City. Source

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