Fig. 4

The effect of different pH (8.1, 7.7, 7.3) and DO concentrations (6 mg/L, 2 mg/L) on the deformity rate of mussels during 96 h exposure. Different uppercase letters represent significant differences between different pH under the same DO (P < 0.05); different lowercase letters represent significant differences between different time points under the same DO and pH conditions (P < 0.05); * indicates significant difference between different DO under the same pH conditions (P < 0.05)