Differences in presence of dominant phyla in the gut bacterial community of mammals based on groupings of habitat and diet using Student’s paired t-test.

Student’s paired t-test of gut bacterial abundance data to generate a p-value (p). Significance level: p = ≤0.001 (***), p = 0.01 (**), p = 0.025 (*). The lack of replication in the marine herbivore grouping does not allow for significance testing.

采用学生配对t检验（Student’s paired t-test）对肠道菌群丰度数据进行分析以生成p值（p）。显著性判定标准如下：p≤0.001时标记为***，p=0.01时标记为**，p=0.025时标记为*。由于海洋植食性动物分组未设置生物学重复，无法开展显著性检验。