Relative abundance of bacterial phyla.

Across (a) four sites and (d) three types of dunes. (b) and (e) are significance test analysis between four sites and three types of dunes based on one-way ANOVA. (c) and (f) are significance test analysis between rhizosphere and bulk soil of four sites and three types of dunes based on Student’s t-test. Data are presented as mean, n = 3. * P < 0.05, ** P < 0.01, *** P < 0.001.