Spatiotemporal distribution and hot spots analysis of ecosystem services in Beijing and Tianjin sandstorm source region
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Institute of Loess Plateau,Shanxi University

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Shanxi Science and Technology Innovation Talent Team (202204051001010); National Natural Science Foundation of China (41977412); Special Research Project of Science and Technology Strategy in Shanxi Province (202204031401006)

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    Abstract:

    In order to assess the ecological benefits and ecological impacts after the implementation of the ecological project in the Beijing-Tianjin wind and sand source area, based on the remote sensing, meteorological, soil, and land use data of the Beijing-Tianjin wind and sand source area from 2000-2017, the CASA (Carnegie-Ames-Stanford approach) model, the InVEST ( Integrated valuation of ecosystem services and trade offs) model, RWEQ (Revised wind erosion equation) model, and RUSLE (Revised Universal Soil Loss Equation) model, respectively. The water yield, soil conservation, carbon sequestration and wind and sand services were estimated respectively, and the Getis-Ord Gi* statistical index method was used to identify the ecosystem services hot and cold spots in the Beijing-Tianjin wind and sand source area. The results showed that (1) each ecosystem service function showed an increasing trend from 2000 to 2017, and the high value areas of the four ecosystem service functions were concentrated in the southeast of the study area, and the low value areas were concentrated in the northwest of the study area. (2) All four ecosystem services showed a significant hotspot area increase in the Ordos Plateau sandy land management area in the southwestern part of the Beijing-Tianjin wind and sand source from 2000 to 2017; the area of hotspot for carbon sequestration services increased significantly, of which the sandy land management area in the Hunshandak-Khorqin sandy area and the hilly mountainous area of the Damshang Plateau and northern North China The hotspot area of water production service has not changed significantly, and the hotspot area is mainly concentrated in the southern part of the study area in the Damshang Plateau and the hilly and mountainous water conservation management area in northern China, and the distribution of the hotspot area is more scattered; the coldspot area of windbreak and sand fixation service has increased in area; the area of the coldspot area of soil conservation service has a small percentage and not much change, and the regional capacity of soil conservation and supply is relatively average. The regional soil conservation supply capacity is relatively average. (3) The results of multiple ecosystem services show that the southeastern region of the study area is able to provide two or more high-value ecosystem service functions, and belongs to the key ecosystem service function supply area, accounting for about 15.5% of the whole study area. (4) The four ecosystem service hotspot areas of forest land accounted for a relatively high percentage of the area from 2000 to 2017, and the hotspot areas of carbon sequestration service functions of grassland and forest land increased significantly, and forest land can provide a high level of integrated ecosystem service functions. The implementation of the Beijing-Tianjin Wind and Sand Source Control Project has improved the overall ecosystem service function in the region, and the results of the study can provide scientific data for assessing the effectiveness of the restoration of the Beijing-Tianjin Wind and Sand Source Control Project, and ultimately realize the sustainable development of the ecological environment in the Beijing-Tianjin region.

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History
  • Received:July 08,2023
  • Revised:October 12,2023
  • Adopted:October 18,2023
  • Online: April 29,2024
  • Published: