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| Impact of land use change on ecosystem service value in Changsha City from 1990 to 2018 |
| PENG Yi1, WANG Yuanchao2, GAO Yang3,4 |
1. Changsha Natural Resources Comprehensive Survey Center, China Geological Survey, Hunan Changsha 410000, China;
2. Applied Geological Research Center, China Geological Survey, Sichuan Chengdu 610036, China;
3. College of Land Science and Technology, China Agricultural University, Beijing 100193, China;
4. Key Laboratory of Agricultural Land Quality and Monitoring, Ministry of Natural Resources, Beijing 100193, China |
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Abstract The evaluation of ecosystem service value is conducive to measuring the supply potential of ecosystem service and the ecological benefit, which can provide important references for city ecological planning and land use management. Based on the remote sensing data of 1990, 2000, 2010 and 2018, the authors in this paper have taken Changsha as a study case to analyze the land use change from 1990 to 2018 and discussed the impact of land use change on ecosystem service value, by ArcGIS and equivalent factor methods with localization correction. The results are as follcws. ① The land use trajectories in Changsha are mainly the conversion of cultivated land and woodland, and the encroachment of cultivated land and woodland by construction land from 1990 to 2018. ② The ecosystem service value in Changsha decreased by 5.317 billion yuan, with the decreasing rate of 3.59% from 1990 to 2018. Except the water area, the value of all the ecosystem service showed a downward trend, especially in the cultivated land and woodland. ③ Hydrological regulation and climate regulation were the top two service functions with high service value, contributing about 54% of the total service value. ④ A series of policies such as Returning Farmland to Forest, Returning Farmland to Lakes and Strengthening Industry to Strengthen City have brought a remarkable impact on ESV, and the urban expansion and land development would lead to declining ESV. It is necessary to pay more attention to the land use types with higher ecosystem service value such as water area and woodland. Adjusting the land use structure and optimizing land allocation in the study area can mitigate the downtrend of ESV in these areas.
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Received: 14 January 2021
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2021, Vol. 8 
