Fig. 1From: Altitude influences microbial diversity and herbage fermentation in the rumen of yaksDifferences in bacterial community richness and OTUs at different elevations. Venn diagram (a) showing the different and similar OTUs at the three elevations. Principal coordinate analysis (PCoA) (b) of the yak ruminal microbiota at the three elevations. The PCoA plots were constructed using the weighted Unifrac method. L, 2800 m; M, 3700 m; H, 4700 mBack to article page