Figure 2. Boxplot of alpha-diversity indecies of bacterial (A, B and C) and fungal (D, E and F) communities among different replicates of phyllosphere samples.

Two-way ANOVA on the calculated alpha-diversity indices were performed: *p < 0.05; **p < 0.01; ***p < 0.001. The abbreviations of study sites and plant species are as follows: LDU, Yuzhong campus of Lanzhou University in Lanzhou city; MJS, a site in the Xinglongshan forest in Majiasi; XLS, Xiaolongshan forest farm in Tianshui City. PA, Picea abies; PC, Picea crassifolia; PK, Picea koraiensis; PL, Picea likiangensis var. rubescens; PW, Picea wilsonii. Number of sample replicates are 3, which are coded as 1–3.