Fig. 2

Genus-level taxonomic composition: stacked bar plots. a Pre-I vs. Pre-NI and b Post-NI vs. Post-I. The horizontal axis lists sample identifiers; the vertical axis denotes the relative abundance percentage of taxonomic units. Individual samples are represented by stacked bars with different colors assigned to different genera (taxonomic units). The length of each colored segment within a bar reflects the proportional contribution of a specific genus to the sample’s microbial composition with longer segments showing higher relative abundance.