Figure 1

Observed mean seed viability and germinability (percentage) for (a,c) 38 naturalized and (b,d) 21 invasive species in each year of exhumation (small green dots) over 7.5 years from seed burial (time zero). Square pink symbols indicate observed mean seed viability values (± SE) for all species, within each group of species (naturalized vs. invasive). Overlapped are fitted values and credible intervals resulting from phylogenetically informed logistic models, modelling the decline in seed viability over 10 years.