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).