Fig. 4

Two bacterial phyla and six bacterial genera exhibited continuous upward or downward trends during prolonged hypoxia. (A) Analysis of the time series clustering of microbiota in the stomach and small intestine at the phylum and genus levels. (B) Relative abundances of Gemmatimonadetes and Acidobacteria at the phylum level and Staphylococcus, Parasutterella, Kocuria, Gemmatimonas, Saccharopolyspora, and Stomatobaculum at the genus level (marked in red). HD hypoxic exposure days; N = Normoxic control.