Summary of the differences in germination between untreated seeds (Control), seeds subject to a summer treatment (Summer) and seeds subject to the fire treatments, for the six species studied.

Fire treatment refers to the seeds submitted to 100°C, 120°C and 150°C for 5 minutes (Fire100, Fire120 and Fire150, respectively). Summer treatment refers to seeds exposed to temperature fluctuations for 30 days (Summer). For C. albidus and U. parviflorus an additional treatment of 80°C for 5 minutes (Fire80) is also included. The significance of the pairwise comparison between treatments is included ( = : not significant; <: P<0.05, <<: P<0.01). For full details of the statistical analysis see Table 2 and Table S2.