Results/Conclusions The application of climate change scenarios to the distribution models resulted in the detection of areas becoming suitable to colonizing populations, as well as areas no longer suitable for the regeneration of existing populations. Model utility varied, with Random Forests and MaxEnt producing the best maps, but with CART generally producing the most ecologically interpretable models. All models indicated climate change scenarios will alter the co-occurrence of pinions and junipers. Shifts in co-occurrence varied from decreasing for all scenarios to increasing for all scenarios with some increasing or decreasing depending on scenario. Differences in the projected co-occurrence of species appear to primarily be a result of differences in projected precipitation seasonality among the scenarios.