Figure 7. Altered gut bacterial composition at the species level. (A) Relative abundance at the species level in the different groups. (B) Red light exposure increased the abundance of g_Ruminococcaceae_UCG-014 in non-LPS-treated mice on day 3 relative to ambient white light or green light exposure. (C) Red light exposure reduced the abundance of g_Lachnoclostridium in non-LPS-treated mice on day 3 relative to ambient white light exposure. (D) Red light exposure reduced the abundance of g_Ruminococcaceae_UCG-005 in septic mice relative to green light exposure. (E) Phylogenetic affiliations of the 31 altered bacteria. Data are shown as the mean ± SEM (n = 6-7/group). *P < 0.05, **P < 0.01, #P < 0.05, ##P < 0.01.