生态学杂志2025，Vol.44Issue(3)：834-847,14.DOI:10.13292/j.1000-4890.202503.033
最适尺度下喀斯特地区生态系统服务供需分异的驱动力探测
Factors driving differentiation in ecosystem service supply-demand in karst regions at the optimal scale
摘要
Abstract
Exploring the spatiotemporal variations,scale effects,and underlying drivers of the supply-demand rela-tionship of ecosystem services in karstic,ecologically fragile regions is essential for improving regional ecosystem services,balancing relationships,and formulating diverse regulatory plans.In this study,we focused on four types of ecosystem services:soil conservation,water yield,carbon sequestration,and food supply.We analyzed the spa-tiotemporal variation in the supply,supply-demand relationships,and the scale effect of the spatial differentiation of ecosystem service supply-demand relationships in Guizhou Province.Furthermore,we elucidated the spatial differ-entiation mechanism of ecosystem service supply-demand relationships at the optimal scale according to the explora-tory spatial analysis and the optimal parameters-based Geographical Detectors Model.The results showed that:(1)the supply and demand of the four ecosystem services increased from 2000 to 2020.All ecosystem services except water yield were in surplus,and the surplus status decreased over time.(2)The supply-demand relationships of ecosystem services showed spatial variations.The regions with a high value of soil conservation supply and demand were mainly distributed on the edge of the study area with high vegetation coverage,while those with a low value of soil conservation supply demand were mainly located in the hinterland.The regions with a high value of supply and demand of water production,carbon sequestration,and food supply were scattered in the central towns/cities,whereas those with low values were distributed throughout the region.The supply-demand surplus in the eastern re-gions with low elevation and high vegetation coverage was more pronounced than that in the eastern regions.(3)The comparative analysis of the scale for the four ecosystem service types,which included eight levels,indicated that the township was the most suitable scale for analyzing the spatial differentiation of ecosystem service supply-demand relationship.This scale reflected more diverse supply and demand characteristics of ecosystem services.(4)At the township scale,population density,normalized difference vegetation index,and gross domestic product were the main forces causing spatial differentiation of ecosystem service supply-demand relationships.The interac-tion between different forces was higher than that of single force,with slope and population density being the most prominent.This study quantitatively identified the optimal scale for ecosystem service supply and demand diver-gence and the underlying drivers for this scale through multi-scale analysis,providing a scientific basis for the accu-rate implementation of ecological restoration projects in karst regions.关键词
生态系统服务/供需关系/空间分异/尺度/驱动机制/基于最优参数的地理探测器Key words
ecosystem services/supply and demand/spatial differentiation/scale/driving mechanism/optimal parameters-based geographical detector model引用本文复制引用
陈田田,温婉琴,王强..最适尺度下喀斯特地区生态系统服务供需分异的驱动力探测[J].生态学杂志,2025,44(3):834-847,14.基金项目
重庆市教委科学技术研究项目(KJQN202000512)和重庆师范大学"博望学者"计划(BWQB 2023017)资助. （KJQN202000512）
