Abstract: Xinjiang,a pivotal region in China's ecological security strategy and a key area in the “Three-North” shelter forest program,plays a vital role in windbreak and sand fixation due to its unique geography.This study uses the revised wind erosion equation (RWEQ)to quantify windbreak and sand fixation amounts and combines it with the multi-scale geographically weighted regression (MGWR)model to analyze the spatiotemporal relationship between landscape patterns and windbreak and sand fixation from 2000 to 2020.The results are as follows: ①From 2000 to 2020,the number of patches (NP),average shape index (SHAPE＿MN),and patch density (PD)showed an increasing trend,while the largest patch index (LPI)and cohesion (COHESION)exhibited a decreasing trend.②The average windbreak and sand fixation amount from 2000 to 2020 increased by 70.73 t/km².The windbreak and sand fixation amount remained stable at a high level in the Junggar basin but was relatively low in the desert areas of the Tarim basin.③The MGWR model showed good stability with an Adjusted R² ranging from 0.706 to 0.715.The regression coefficients of NP and COHESION were positive,while those of the other landscape indices were negative.This study provides a basis for refined landscape management and optimized windbreak and sand fixation strategies in Xinjiang,promoting regional ecological sustainability.

Key words: landscape pattern, windbreak and sand fixation, multiscale geographically weighted regression, spatio-temporal changes, Xinjiang