玛依湖保护区生态环境质量时空变化及驱动因素分析OACSTPCD

Scientifically evaluating the quality of ecological environment and clarifying its driving factors of spatial differentiation are important prerequisites for improving regional ecological environment and main-taining regional ecological security.In this study,the remote sensing ecological index(RSEI)of Mayi Lake Nature Reserve was calculated based on remote sensing image data from 2000 to 2020.The Mann-Kendall test method was used to determine the typical years during the study period,and then the spatial and tem-poral variation characteristics of ecological environment quality were analyzed.Finally,the spatial autocor-relation method and geographical detector model were used to explore the spatial correlation of ecological environment quality and its potential driving factors.The results showed that 1)from 2000 to 2020,the mean value of remote sensing ecological index of the reserve showed a fluctuating upward trend,and the lowest value(0.28)was in 2009.In each typical year,the ecological environment quality showed a spatial distribution pattern of"high in the middle and low around".In 2009,ecological environment quality grade of Zhonghu District and Xiahu District decreased mostly,but on the whole,the ecological environment quality of the reserve had been improved in the past 20 years.2)The global Moran's I was between 0.64 and 0.71.There was a strong positive correlation between the ecological environment quality in the study area,and its spatial distribution was clustered.The high-high accumulation area was distributed in the cen-ter of the reserve,and the low-low aggregation area was distributed around the reserve.In the past 20 years,the area of high-high aggregation area had been expanding.3)The detection results of geographical detector showed that the influence of land use on the change of ecological environment quality was increas-ing except that the greenness and dryness of model factors had great influence on the change of ecological environment quality.