Spatial and temporal variability of ecosystem services in the Shiyang River Basin and its multi-scale influencing factors
A multi-scale quantitative analysis of the factors that influence the spatial and temporal changes in ecosystem services is an important breakthrough in revealing the mechanisms of ecosystem service evolution and promoting sustainable regional development.Existing studies focus on determining the scale of research from the administrative division or watershed level,and lack scientific and sound scale division methods.Taking the Shiyang River Basin as the study area,this study evaluated the spatiotemporal variation characteristics of four ecosystem services—food supply,carbon sequestration,water production,and wind and sand control.Wavelet analysis and the optimal parameters-based geographical detector model were used to determine the optimal scale and the main influencing factors at different scales for studying the spatiotemporal changes of ecosystem services.The results show that:1)The four ecosystem services(food supply,carbon sequestration,water production,and wind and sand control)in the basin all showed an increasing trend from 2000 to 2020.Food supply services increased the most,by 138.3％,while carbon sequestration,water production,and wind and sand control services increased by 0.97％,7.6％,and 9.5％respectively.2)According to the wavelet square difference main cycle of the four ecosystem services,six characteristic scales of influencing factors were constructed from 2000 to 2020 and from 2010 to 2020,and seven from 2000 to 2010,respectively.3)With the increase of scale,the effect of the influencing factors on the temporal and spatial changes of ecosystem services gradually increased,and the main influencing factors at different scales were significantly different.Food supply and carbon sequestration services were mainly affected by human factors on a small scale and natural factors on a large scale.Water production service was always affected by natural factors at different scales.With the increase of scale,the influence of human factors on the wind and sand control service was significantly enhanced.4)The increasing trend of q-values of various interaction factors in the process of increasing scale is different and among these,the interaction between the human factors of carbon sequestration and wind and sand control services is significantly enhanced.This study addressed the inadequacies of the traditional multi-scale sequence construction method through wavelet analysis,which can provide a reference for optimizing regional ecosystem structure and making multi-level ecosystem management decisions.
ecosystem serviceswavelet analysismulti-scalesoptimal parameters-based geographical detectorShiyang River Basin
万方数据
维普
