Figure 4. Group means of field- and model-based estimates of coarse woody debris carbon density.

Individual (per-unit-area) estimates of field- (observation) and model-based (prediction) coarse woody debris carbon were ordered and grouped with respect to the model-based estimates into at least 100 groups with group sizes not exceeding 200. Group means were calculated and plotted against one another and a 1∶1 line was constructed to assess the quality of fit of the model to the field data. If the models fit the field-based data perfectly, the data points should lie along the 1∶1 line with intercept 0 and slope 1. Note that extreme outliers were omitted for graphing purposes.