Partial dependence plots for the nine most influential variables in the boosted regression tree (BRT) model predicting probability of American Bullfrog (BF; Lithobates catesbeianus) presence in ponds.

Predictors were measured during a field study of California Red-legged Frogs (Rana draytonii) in Central California. Relative importance is depicted for each predictor, holding all other predictors at their mean. See Table 1 for units and explanations of each predictor.