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.