Fig. 1. Predicted fire ant distribution map (90% probability) for the state of South Carolina, USA, based on stepwise logistic regression analysis of sampling data, 1999-2000. We modeled the presence/absence of the stressor, i.e., fire ants, as the dependent variable, and habitat, soils, aspect, and landscape metrics such as patch size, shape, the euclidean distance of the survey location to a development, the area of development at various buffer distances around each survey location, the euclidean distance of the survey location to a paved road, were independent predictor variables. Only habitat variables were significant predictors of fire ant occurrence.