Table 3. Results of the broken-stick regression for the boosted regression trees models considering the original distribution model, a rat-free model (where we exchanged the variable distance to coast with distant to the nearest ret-free island) and the rat-invaded model (where we replaced distance to coast by distance to nearest rat-invaded island). The broken stick regression is represented by the breaking point which is the inflection point of the partial dependence plot from each model. Lower and upper confidence interval at 95% are reported in each break point.