2.6 Spatial Pattern Change
The distribution probability of T. sinense underwent reclassification, and a grid calculator was employed to delineate the distribution change layer of T. sinense between historical or future periods and current climate scenarios. Based on the grid values, four types of distribution area changes in T. sinense were redefined: retention (3), additions (2), losses (1), and non-suitable (0). The suitable area for each type was determined by calculating the proportion of each value.