Fig. 9. Interaction plots of the percentage of error between predicted and observed proportions of Calopteryx maculata along stream habitat for four levels of stream boundary permeability or probability of moving off stream (P_mv). Percentages of error are displayed according to levels of the move parameter (M) in stream (M_stm), forest (M_for), and pasture (M_pas) and according to landscape type: forested (FO), partially forested (PF), and nonforested (NF). Note that only M_stm and P_mv parameters vary among landscape types. See Table 1 for turn concentration parameter (T) values for each habitat type. Simulated data are from the PERMEABILITY model. Data points are mean percentage of error ([predicted - observed]/observed × 100) based on four simulation runs per individual landscape for each combination of P_mv and M values. The horizontal dotted line across each panel indicates perfect agreement between simulated and empirical data. The horizontal dashed lines at ± 25% across each panel indicate the cutoff between acceptable and poor model fit.