FIGURE 4.
Shannon index (A), observed species (B), phylogenetic diversity (C) and fisher alpha (D) of bacterial community on haze and non-haze days in nine haze events during October 1, 2015, to January 5, 2016. Nos. 1–9 represent nine haze events. Yellow and green columns represent samples from non-haze and haze days, respectively. Error bars represent SD of samples from non-haze or haze days in each haze event, respectively. Non-haze samples in No. 2 and No. 6, and haze samples in No. 3 and No. 6, were not repeated because haze duration was too short in these haze events. T-test, ∗p < 0.05.