Figure S9. Age range diversity
within the youngest island Hawai‘i (a). The map is based on the geologic
Map (Sherrod et al 2007). Box plots for taxonomic (b), phylogenetic (c)
and functional (d) diversity estimation include only plots located on
very wet areas (> 5000 mm/year) on Hawai’i island.
Table 1. Test of the statistical significance of the interaction term
between island (i.e., age) and mean annual precipitation (MAP). Models
were fitted for the three facets of alpha diversity, i.e., taxonomic
(TD), phylogenetic (PD) and functional diversity (FD), including Hill
numbers q=0 and q=2, and for beta diversity (beta C) for both sets of
data, i.e., plots relatively uninvaded by alien species including
natives species only (i.e., native species models) and all plots
including invaded ones with native and alien species (i.e., native and
alien species models). P-values correspond to the Likelihood Ratio Test,
which we used to test the statistical significance of the interaction
term between island age and precipitation. Note that all p-values are
smaller than 0.05 indicating that including the interaction term
improves goodness of model fit. We fitted the models using generalized
linear models with gamma family and log link (see details in methods).