Fig. 1From: Machine learning approaches identify male body size as the most accurate predictor of species richness Random Forest (RF) results for different groups of variables. The bottom and middle panels represent RF results for specific groups of predictor variables. The top right panel represents RF results for the combination of all predictor variables while the top left panel shows RF results for the best predictor variables from each variable group only. Note that the greater Gini decrease for a specific variable is, the greater predictive power that variable has for species richness of spider generaBack to article page