Fig. 6From: Effects of altitude on human oral microbesComparison of alpha diversity between the high altitude (HA) and ultrahigh altitude (UHA) groups (a, b). Boxplots showing the differences in the alpha diversity indices (Chao 1 and ACE) between the high altitude (HA) and ultrahigh altitude (UHA) groups. Pearson’s correlation analysis between altitude and the alpha diversity indices Chao 1 (c) and ACE (d)Back to article page