[目的]量化和分析山江海耦合关键带生态系统服务价值及时空变化,有助于深入了解其生态系统服务现状,进而阐明山江海耦合关键带生态服务之间的权衡/协同关系,对提高生态系统服务之间相互作用的认识,促进区域全面可持续发展和生态环境保护与修复具有重要意义.[方法]基于 1990-2020 年 7 期土地利用数据及结合修订后的当量因子表,运用网格法、地理加权回归等方法分析了山江海耦合关键带 1990-2020 年 ESV时空变化和各项生态系统服务相互关系及其空间分异特征.[结果]1990-2020 年山江海耦合关键带总 ESV 从 788.55 亿元增加至 792.30亿元,增幅为 0.48%,林地、耕地、水域地类 ESV较高,为区内总 ESV主要贡献因子,建设用地 ESV较低,ESV在空间上呈现从西北向东南降低的趋势;1990-2020 年各项生态系统服务相互关系以协同关系为主,约占 85.45%,其中权衡高值区主要分布在山江海耦合关键带中部及南部地区,低值区主要分布在百色市喀斯特山区;协同低值区主要分布在人口密集、人类活动频繁、经济较为发达的市县级城区及沿海地区.[结论]1990-2020 年山江海耦合关键带生态系统服务整体协调且保持动态平衡,食物生产活动会影响其他生态服务的能力,未来地方应严格把控生产活动开发边界,注重对生产地区的环境保护与修复.
[Objective]Quantifying and analyzing the value and spatiotemporal changes of ecosystem services in the key coupling zone of mountain-river-sea is helpful to understand the current situation of ecosystem services,and then clarify the trade-off/synergy relationship between ecosystem services in the key coupling zone of mountain-river-sea.It is of great significance to improve the understanding of the interaction between ecosystem services and promote the comprehensive sustainable development of the region and the protection and restoration of ecological environment.[Methods]Based on the landuse data from 1990 to 2020 and the revised equivalent factor table,the grid method and geographically weighted regression were used to analyze the spatial and temporal changes of ESV and the relationship between various ecosystem services and their spatial differentiation characteristics in the mountain-river-sea coupling key zone from 1990 to 2020.[Results]From 1990 to 2020,the total ESV in the key zone of mountain-river-sea coupling increased from CNY 78.855 billion to CNY 79.230 billion,with an increase of 0.48% .The ESV of forest land,cultivated land and water land was higher,which was the main contribution factor of the total ESV in the area.The ESV of construction land was lower,and the ESV showed a trend of decreasing from northwest to southeast in space.From 1990 to 2020,the interrelationships of various ecosystem services were mainly synergistic,accounting for about 85.45% .The high-value areas of trade-offs mainly distributed in the central and south-ern regions of the mountain-river-sea coupling key zone,and the low-value areas mainly distributed in the karst mountainous area of Baise City;the synergistic low-value areas mainly distributed in urban and coastal areas with dense population,frequent human activities and relatively developed economy.[Conclusions]From 1990 to 2020,the ecosystem services in the key coupling zone of mountain-river-sea were coordinated and maintained a dynamic balance.Food production activities would affect the ability of other ecological serv-ices.In the future,local governments should strictly control the development boundary of production activi-ties and pay attention to environmental protection and restoration of production areas.