太行山区生态系统服务冷热点区域识别及其权衡/协同关系分析

Cold/hot spots identification and tradeoff/synergy analysis of ecosystem services in Taihang Mountain area

  • 摘要: 生态系统服务冷热点区域特征的研究对生态系统服务的保护与优化提升有重要意义, 山地提供的生态系统服务具有不可替代性。因此, 本文以太行山区的生态系统服务为研究对象, 基于Getis-Ord Gi*统计指数方法, 识别太行山区1990年、2000年、2010年和2015年的生态系统服务冷热点区域, 分析冷热点区域供给、调节、支持和文化生态系统服务两两之间的权衡/协同关系。研究结果表明: 1)时间尺度上: 太行山区3 km×3 km栅格尺度上生态系统服务总价值在0~18 506万元间划分出5个等级区间, 4个研究年度各等级区间的面积和空间分布格局基本保持不变。2)冷热点空间分布上: 以2015年为例, 太行山区生态系统服务热点区域遍布于整个太行山区, 其中以亚高山区面积占比最大; 冷点区域主要分布在太行山区东西部的山地平原过渡带的低山丘陵区, 冷点区域在亚高山区没有分布。3)土地利用的生态系统类型上: 森林、水域和湿地中不存在冷点区域, 水域、森林和湿地热点区域面积比例较大。4)权衡/协同关系上: 太行山区生态系统服务冷热点区域中, 供给、调节、支持和文化生态系统服务两两之间只有协同关系。研究结果以期从空间、土地利用以及生态系统服务类型方面为太行山区生态系统服务保护和提升决策提供理论支撑。

     

    Abstract: Mountains provide people with water conservation, soil conservation, climate regulation, biodiversity maintenance, product supply, and other ecosystem services. These ecosystem services are irreplaceable. Research on the characteristics of cold/hot spots of ecosystem services is of great significance for the protection and promotion of ecosystem services. Therefore, taking Taihang Mountain area as a research area, the cold/hot spots of ecosystem services were identified, and the tradeoff/synergies among ecosystem services were analyzed to provide theoretical support for the protection and promotion of ecosystem services in the Taihang Mountain. Cold/hot spots of were identified based on Getis-Ord Gi* statistical index. On this basis, the correlation coefficient method was used to analyze the tradeoff/synergy between the four ecosystem services in the cold/hot spots regions. The results are as follow: 1) On the grid scale, the total value of ecosystem services ranged from 0 Yuan to 185.06 million Yuan. The ecosystem service values were divided into five grades. The area and spatial distribution of the total value of ecosystem services on the grid scale remained unchanged from 1990 to 2015. The main distribution grades were 3.68−11.56 million Yuan and 11.56−33.85 million Yuan, and the two sections account for approximately 80% of the total area of Taihang Mountain area. The high-value area of 62.18−185.06 million Yuan has the least distribution area, accounting for only 1% of Taihang Mountain area. 2) In 2015, the total ecosystem service hot spots were distributed throughout the mountain area. The distribution area was the largest in the sub-alpine region (9558 km2), followed by the mid-mountainous region (5238 km2), and the smallest was in the hilly region (3969 km2). The cold spots area was mainly distributed in the eastern and western edges of the mountain area, whose distribution area in the low hills accounted for approximately 70% of the total area. 3) There were no cold spots in forests, water areas, or wetlands. There were no hot spots in the desert ecosystem. The hot spots in the water area, forest, and wetland were large in proportion; water areas had the largest proportion of hot spots (up to 65%), followed by forests and wetlands. The cold spots area in deserts, construction lands, and farmlands were large in proportion, and desert had the largest proportion of cold spots (up to 69%), followed by construction lands and farmlands. 4) In the cold/hot spots areas of the total ecosystem services in 2015, there was only a synergistic relationship among the ecosystem services. The conclusions drawn from the above results are as follows: 1) Based on the spatial distribution characteristics, the priority area for ecosystem services protection should be the subalpine area. 2) Based on land use, the priority protected areas for ecosystem services should include forests, water areas, and wetlands. 3) Based on the tradeoff and synergy between the four categories of ecosystem services in the cold/hot spots area of the Taihang Mountain, the cold/hot spots area can be used as the priority area for improving the protection of ecosystem services from the perspective of conservation efficiency.

     

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