Table 1.

Distribution of DA ASVs across putative habitat preference.

putative habitat	no. of ASVsa	perfect BLAST hitsb	total IMNGS hitsc	median IMNGS hits	taxa (total ASVs)d
fish	33	2	430	8	Bacteroidales (3), Brevinemataceae (1), Desulfovibrionaceae (3), Erysipelotrichaceae (2), Lachnospiraceae (6), Mollicutes (1), Ruminococcaceae (3), Vibrionaceae (14)
animal	11	1	9934	180	Bacteroidales (1), Erysipelotrichaceae (1), Fusobacteriaceae (5), Lachnospiraceae (1), Peptostreptococcaceae (1), Ruminococcaceae (1), Family XIII (1)
generalists	15	10	9493	185	Alphaproteobacteria (7), Flavobacteriaceae (2), Pirellulaceae (2), Rubritaleaceae (4)

^aTotal number of DA ASVs from each putative habitat category.

^bNumber of ASVs with at least one perfect (100%) BLAST hit.

^cTotal number of IMNGS samples hit by ASVs.

^dTaxonomic breakdown and total number of DA ASVs (in parentheses) for each putative habitat category.