京津风沙源生态系统服务时空分布及冷热点分析
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常瑨予(1999—),女,在读硕士研究生,主要从事生态系统服务研究。E-mail:13663451620@163.com

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K903

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山西省科技创新人才团队项目(202204051001010);国家自然科学基金项目(41977412);山西省科技战略研究专项(202204031401006)


Spatiotemporal Distribution of Ecosystem Services and Analysis of Cold and Hot Spots in Beijing-Tianjin Sandstorm Source Region
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    摘要:

    [目的] 为明晰京津风沙源区生态系统服务时空格局特征及识别其冷热点,评估京津风沙源区实施生态工程后的生态效益及生态影响。[方法] 基于京津风沙源区2000—2017年的遥感、气象、土壤、土地利用等数据,利用CASA(carnegie-ames-stanford approach)模型、InVEST(integrated valuation of ecosystem services and trade offs)模型、RWEQ(revised wind erosion equation)模型和RUSLE(revised universal soil loss equation)模型分别估算产水量、土壤保持、固碳和防风固沙服务,采用Getis-Ord Gi*统计指数方法,识别京津风沙源区生态系统服务冷热点区域。[结果] (1)2000—2017年各项生态系统服务功能均呈现上升趋势,4项生态系统服务功能的高值区集中在研究区的东南部,低值区集中在研究区的西北部。(2)2000—2017年4项生态系统服务均在京津风沙源西南部的鄂尔多斯高原沙化土地治理区出现明显的热点面积增加现象;固碳服务热点区域面积显著增加,其中,浑善达克-科尔沁沙地沙化土地治理区和坝上高原及华北北部丘陵山地水源涵养治理区的冷点区域向热点区域转化;产水服务冷热点面积占比没有明显变化,热点区主要集中在研究区南部坝上高原及华北北部丘陵山地水源涵养治理区,冷点区分布较为零散;防风固沙服务冷点区域面积增加;土壤保持服务冷热点区域面积占比很小且变化不大,区域土壤保持供给能力比较平均。(3)多重生态系统服务结果显示,研究区东南部区域能够提供2项及以上的高值生态系统服务功能,属于重点生态系统服务功能供给区,约占整个研究区15.5%。(4)2000—2017年林地4项生态系统服务热点面积占比较高,草地和林地的固碳服务功能热点面积显著增加,林地可提供较高的综合生态系统服务功能。[结论] 京津风沙源治理工程的实施使得区域内总体生态系统服务功能提升。研究结果可为评估京津风沙源治理工程恢复成效提供一定科学数据,最终实现京津地区生态环境的可持续发展。

    Abstract:

    [Objective] This study was aimed to assess the ecological benefits and ecological impacts after the implementation of the ecological project in the Beijing-Tianjin wind and sand source area. [Methods] 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, the water yield, soil conservation, carbon sequestration and wind and sand services were estimated respectively. 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. [Results] (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 cold spots in the Hunshandak-Khorqin sand land control area and the hilly mountainous area of the Damshang Plateau in northern North China had transformed into hotspots. The hotspot area of water production service did not change significantly, and the hotspot area was 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 cold spot area of windbreak and sand fixation service had increased in area; The area of the cold spot area of soil conservation service had a small percentage and not much change, and the regional capacity of soil conservation and supply was relatively average. (3) The results of multiple ecosystem services showed 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. [Conclusion] 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 realizing the sustainable development of the ecological environment in the Beijing-Tianjin region.

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常瑨予, 武志涛, 李琪, 梁寒雪, 杜自强, 雷添杰, 孙斌.京津风沙源生态系统服务时空分布及冷热点分析[J].水土保持学报,2024,38(3):216~226

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  • 收稿日期:2023-07-08
  • 最后修改日期:2023-10-15
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  • 在线发布日期: 2024-07-03
  • 出版日期: 2024-06-28