[1]DAI Yunzhe,LI Jiangfeng.Terrain Gradient Effect of Spatiotemporal Evolution of Ecological Land and Ecosystem Service Value in Dongting Lake Area[J].Research of Soil and Water Conservation,2018,25(03):197-204.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 03
Page number:
197-204
Column:
Public date:
2018-04-10
- Title:
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Terrain Gradient Effect of Spatiotemporal Evolution of Ecological Land and Ecosystem Service Value in Dongting Lake Area
- Author(s):
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DAI Yunzhe, LI Jiangfeng
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School of Public Administration, China University of Geosciences, Wuhan 430074, China
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- Keywords:
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ecological land; ecosystem service value; terrain gradient; Dongting Lake area
- CLC:
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F301.24
- DOI:
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- Abstract:
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We accomplished a pattern analysis of ecological land use pattern and its ecosystem service value evolution from the two aspects of quantitative change and vertical distribution in Dongting Lake from 1990 to 2015. The results indicated that:(1) the total amount of ecological land increased from 17 215.77 km2 to 17 258.28 km2 during 1990 and 2015 with the increase of wetland and the shrink of forest and grassland; (2) during the study period, ecosystem service value of ecological land has experienced multiple times of fluctuations, and finally rose to 139.93 billion yuan in 2015 from 85.67 billion yuan in 1990, meanwhile the ecosystem service value of wetland had increased significantly; (3) the dominant distribution area of wetland was found in the lower terrain gradients (1~10), the dominant distribution areas of forest and grassland were found in the higher terrain gradients (30~50); the transfer of ecological land appeared alternately in different periods, input mainly concentrated in the lower terrain gradients, while outflow covered the wider gradients; (4) the dominant distribution area of ecosystem service value converged into lower terrain gradients and the concentration kept increasing. The contribution of ecosystem service value from forestland and grassland in middle and higher gradient areas had decreased significantly. Ecological control and construction could carry out precisely under the unambiguous understanding of vertical distribution pattern of ecological land and its ecosystem service value, which is important to accomplish the healthy development of the compound ecosystem under the high-intensity impulse of rapid urbanization in Dongting Lake area.