3.6 Microbial taxa and functioning profile significantly associated with host samples
A comparison between sources in ALDEx2 analysis yielded 166 differentially abundant ASVs (Figure 7, Table S7). A majority of ASVs were affiliated with Rhodobacteraceae , Flavobacteriaceae ,Rhizobiaceae , Sphingomonadaceae, andCyclobacteriaceae . 126 of the differentially abundant ASVs were also considered as bacteria indicator taxa. 334 pathways were revealed as significantly differentiated profiles. Pathways associated with the cofactor, carrier, and vitamin biosynthesis and degradation of amino acid and carbohydrate generally occurred more abundant in midgut samples. Whereas pathways involved in inorganic nutrient metabolism, amine, and polyamine degradation, and aromatic compound degradation were more likely to be found in seawater samples (Figure 8, Table S8). Functional pathways distinguished between sources but not sites (Figure S5, Table S9).