Road distance
We evaluated the effect of the logarithmic distance (Log10) from the road on total plant species richness, life form richness (Raunkiaer, 1934), endozoochorous richness (Pijl, 1982), resprouter richness (Meira-Neto et al. , 2011) and nitrogen-fixer richness (Sprent, 2009). We performed generalized linear models (Glm) with Quasi-Poisson distributions for regressions associating and testing the significance of road distances with the different measures of species richness. The quasi-Poisson distributions were chosen when the dispersion parameters for gaussian family were too large. All analyses were performed in R statistical environment (R Development Core Team, 2015).