3.1.1 Lineage
At a resolution of 5 arc-minutes, the most important variables for the sea snakes’ lineage were phosphates (Pho), salinity (Sal), and temperature (Tem), which together accounted for the highest PC. However, when the importance of variables was permuted (PI), nitrates (Nit), silicates (Sil), and Tem emerged as the most important factors. At 10 arc-minutes for PC and PI, Sil and Tem were important variables, while Nit was also important in PI. Finally, we only found differences between the median of Sil when comparing both resolutions in PC (Table SM3).