Fig. 4
Differentially abundant Amplicon Sequencing Variants (ASVs) in the gut microbiome of adult Seychelles warblers that survived versus those that died by the next breeding season. N = 148 adult individuals were included in the analysis (127 individuals survived, 21 individuals died). Points represent the log fold change (effect size) of individual bacterial ASVs—only those with significant effect sizes (Padj < 0.05) are shown. A positive log fold change indicates that an ASV is more abundant in individuals that survived (right), and a negative log fold change indicates a higher abundance in individuals that died by the next season (left). Bars represent 95% confidence intervals derived from the ANCOM-BC model. ASVs are classified by bacterial order on the y-axis and are coloured by phylum. Results of differential abundance tests and ASV taxonomies are presented in full in Additional file 1: Table S5