Fig. 3

Potential interaction patterns of the hub-MAGs with the six representative phyla/groups derived from the genomic data. The MAGs are grouped according to their phyla. Groups are labeled with the group number in the top right corner, and the detailed information on the corresponding MAGs is provided in Table S7. The number of MAGs in each group is indicated in the bottom right corner. The substrates that each group could utilize were determined according to the genes related to the organic matter degradation and energy generation (Table S8). The number of MAGs in one group potentially delivering compounds to another group is denoted by the number beside the arrows. The compounds in black were derived by SMETANA and verified with KEGG Mapper [36]. Those indicated in purple represent metabolic handoffs (\(\backsim 2\%\) of the overall interactions) derived with KEGG Mapper but not predicted in SMETANA. The data related to the exchanged compounds derived with SMETANA are provided in Table S5. AAs, amino acids; Ac, acetate; Aca, acetaldehyde; Etol, ethanol; Glc, glucose; Lac, lactate; Lip, lipids; Rib, ribose; PEP, phosphoenolpyruvate; Pyr, pyruvate; Inost, myo-inositol; APS, adenosine 5’-phosphosulfate; PAPS, 3’-phosphoadenosine-5’-phosphosulfate