基于MAUP下川滇生态屏障区生态系统服务价值多尺度空间分异及地理探测响应

Multi-Scale Spatial Differentiation and Geographic Detection Response of Ecosystem Service Value in Sichuan-Yunnan Ecological Barrier Based on the Modifiable Areal Unit Problem

为探析生态系统服务价值(ESV)在可塑性面积问题(MAUP)下的分区效应,以川滇生态屏障区为例,基于2018年土地利用数据,划分格网、行政区和流域3类不同尺度类型9级评价单元,运用空间自相关分析、地理探测器等方法探究了ESV多尺度空间分异特征及地理探测响应。结果表明:川滇生态屏障区2018年ESV为7 945.81亿元,以林地和草地的贡献最为突出;3类尺度下ESV空间分布具有明显的分区效应,大体呈现出评价单元尺度类间差异性大,类内差异性小的空间分异特征,同时其空间集聚效应及冷热点区空间分布随着评价单元尺度划分大小的不同而差异显著;通过对比分析,将格网尺度与行政区尺度结合分析,可作为大区域生态功能区ESV综合评价的尺度参考;自然因素及社会经济因素的交互协同增强效应共同影响了川滇生态屏障区ESV分异效果,不同尺度下,因子解释力大小不同。综上,评价单元划分的不同会影响评价结果的准确性,结合具体研究需求开展多尺度评价成为未来ESV科学量化的前提条件。

In order to explore the zoning effect of ecosystem service value(ESV) under the modifiable areal unit problem(MAUP), taking the Sichuan-Yunnan Ecological barrier as the research object, based on the data of land use in 2018, we used three different scale types and 9 level evaluation units including grid, administrative region and river basin, the method of spatial autocorrelation analysis, geographic detector to examine the ESV multi-scale space differentiation characteristics, and to explore the factor detection and geographic detector response under MAUP. The results indicate that the ESV of the Sichuan-Yunnan Ecological Barrier was 794.581 billion yuan in 2018, with woodland and grassland contributing the most;the spatial distribution of ESV had obvious partitioning effect at different scales, showing the spatial differentiation characteristics of large inter-class differences and small intra-class differences in the scale of evaluation units;at the same time, the spatial agglomeration effect and the spatial distribution of cold and hot spots were significantly different with the different sizes of the evaluation units;through comparative analysis, the grid scale and administrative district scale were combined and analyzed, which could be used as a scale reference for the comprehensive evaluation of ESV for comprehensive evaluation of ESV in large-scale ecological barrier areas;the interaction and synergistic enhancement effects of natural factors and social and economic factors jointly affected the ESV differentiation effect of the Sichuan-Yunnan ecological barrier. In conclusion, the different division of evaluation units will affect the accuracy of evaluation results, and multi-scale evaluation with specific research needs becomes a prerequisite for future scientific quantification of ESV.