River birch and Virginia pine seedlings were exposed to 0.3, 0.6, 0.9, 1.2 and 2.4 ppm SO2 (800, 1600, 2400, 3100, and 6300 μg m3, respectively) for 1, 2, 4, and 8 h in modified controlled environment chambers. Data quantifying the severity of SO2 induced leaf necrosis provided by these exposures were used to evaluate dose-response models developed by O'Gara, Guderian et al., Zahn, and Larsen and Heck, or simple extensions of them. Model performance was assessed based on R2 values and P-values from tests for aptness of the model. The four original models gave acceptable R2 values but failed tests for aptness. Extensions of the Larsen-Heck and Zahn models performed better than the other models examined.
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Science(all)
- Earth and Planetary Sciences(all)