Figure 5.
Rarefaction curves (A) and principal coordinates analysis (PCoA) plots of weighted (B) and unweighted (C) UniFrac distances of colonic microbial communities from weanling pigs fed diets containing antibiotics or direct-fed microbials. While two diversity measures (PD whole tree; Chao1) were not different due to sex, observed OTU showed a trend (P = 0.061) for greater diversity in barrows vs. gilts. Unweighted and weighted UniFrac distances performed on the 97% OTU abundance matrix showed that sexes tended to be different from one another (unweighted: P = 0.01; weighted: P = 0.02).