Supplementary Figures 1-13

Supplementary Fig. 1 Sampling sites in the Xianbei (XB) and Zhenbei (ZB) seamounts in SCS.Supplementary Fig. 2 Line chart showing the variation of environmental factors with depth at the ZB and XB Seamount.Supplementary Fig. 3 The basic genomic information of all high-quality and medium-quality genomes.Supplementary Fig. 4 Alpha diversity of prokaryotes in SCS seamounts.Supplementary Fig. 5 Alpha diversity of viruses in SCS seamounts.Supplementary Fig. 6 The unique and shared taxa of prokaryotes and viruses in SCS seamounts.Supplementary Fig. 7 Correlations between environmental variables and microbial community composition.Supplementary Fig. 8 Genomic and functional disparities of Pseudomonadota (rMAGs) with distinct niche breadths.Supplementary Fig. 9 Comparison of metabolic categories of Alphaproteobacteria across different niche breadths in SCS seamounts.Supplementary Fig. 10 Comparison of metabolic categories of Gammaproteobacteria across different niche breadths in SCS seamounts.Supplementary Fig. 11 PCoA ordination of prokaryotic and viral KEGG Ortholog (KO) functional profiles.Supplementary Fig. 12 Heatmap of functional gene (based on KEGG Ortholog, KO) abundances for core metabolic pathways across different depth layers in ZB and XB seamounts.Supplementary Fig. 13 Transcriptional abundance proportions (TPM-based) of prokaryotes and viruses in ZB Seamount.