Fig. 2

Covariates of the gut archeaome variation and their effect sizes. a The effect size of metadata variables in the gut archaeome variation. Archaeome covariates were identified via envfit (vegan) and those with statistical significance (FDR adjusted p < 0.05) were colored based on the metadata category shown in b. p < 0.05*, p < 0.01**. Pie chart shows the fraction of archaeome variation explained by all captured metadata variables. b Combined effect size of archaeome covariates pooled in predefined categories with covariate distance-based selection. c Correlation between relative abundance of Methanobrevibacter smithii and frequency of wild foods consumption (graded into 4 continuous levels). d Correlation between relative abundance of Methanobrevibacter oralis and host age by linear regression