highly significantp = 0.00025
The Chao1 index showed highly significant differences among groups ( p = 0.00025), with the HFD group exhibiting markedly reduced microbial richness compared with the ND group.
The Chao1 index showed highly significant differences among groups ( p = 0.00025), with the HFD group exhibiting markedly reduced microbial richness compared with the ND group.
The Simpson index showed an improving trend but did not reach statistical significance ( p = 0.14).
At the phylum level ( Figure 4 C), HFD induced a typical obesity-associated dysbiotic signature characterized by increased Firmicutes_D, decreased Bacteroidota and consequently an elevated F/B ratio, accompanied by an increasing trend of Desulfobacterota_I.