2.5 Core distributional shifts
Under current and future climate circumstances, the SDM toolbox is used to calculate shifting trends in the area of appropriate habitat based on Python, as well as changes in the centroid of the area of suitable habitat (19). The toolbox is a Python-based GIS application (20). Using the toolbox, researchers calculated shifting trends in areas of appropriate habitats and compared the centroids of the regions between current and future climate conditions. The study provides information about the core shifts and distribution of S. ciliatum , S. nepalense , and S. yunnanense . These species’ diversity was reduced to a single centroid (central) point, and a vector file was constructed to show the amount and direction of expected change over time. Finally, we looked at how the centroid changed with different SDMs to see if there were any distribution shifts.