Fig. 1

Venn diagram illustrating the shared and unique fecal microbial amplicon sequence variants (ASVs) among Yunnan Semi-Fine Wool rams fed diets with different calcium levels: Q_1 (0.53% Ca, light green), Q_3 (0.74% Ca, red), and Q_5 (0.98% Ca, yellow). Each circle represents the ASVs detected within a specific dietary group, while overlapping regions indicate ASVs common between two or all three groups.