Additional file 1 of Response of soil microbial community structure and function to different altitudes in arid valley in Panzhihua, China

Additional file 1: Fig. S1. Principal component analysis (PCA) of the soil sample under the treatments of different elevations. High, altitude 2000 m a.s.l.; medium, altitude 1800 m a.s.l.; low, altitude 1600 m a.s.l.