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Table 2 Taxonomic information of dominant modules in the networks of all samples (AS), Cluster I (C1), and II (C2)

From: The core populations and co-occurrence patterns of prokaryotic communities in household biogas digesters

  Number of nodes Module hubs Methanogens Abundant phyla/classes
(1) AS 110    
AM1 27 Bacteroidales, Sphaerochaeta, Treponema, Methanocorpusculum, etc. Methanocorpusculum, Methanoculleus Bacteroidetes, Spirochaetes
AM4 19 Clostridium, Clostridium XI   Clostridia
AM5 11 Clostridium   Clostridia
AM7 15 Bacteroidales, Parabacteroides, Desulfobulbus, Syntrophus Methanosaeta Bacteroidetes, Spirochaetes, Euryarchaeota
AM8 21 Sphaerochaeta, Bacteroidaceae, Porphyromonadaceae   Bacteroidetes, Spirochaetes, Clostridia
(2) C1 103    
C1M0 13 Coriobacteriales, Leucobacter etc.   Clostridia, Actinobacteria, Synergistetes
C1M1 28 Clostridium, Pirellulaceae, Gaiellales, etc. Methanosaeta Clostridia, Chloroflexi, Actinobacteria
C1M2 24 Clostridium, Ruminococcaceae, Erysipelotrichaceae Methanosarcina Clostridia
C1M4 18 Clostridium, Clostridia, Coriobacteriales, Syntrophomonas   Clostridia
C1M6 10 Sphingomonas   Alphaproteobacteria, Gammaproteobacteria
(3) C2 206    
C2M0 9    Clostridia
C2M1 36 Sphaerochaeta, Bacteroidales, Clostridium, Tissierella, Treponema, Cloacibacillus, etc.   Spirochaetes, Bacteroidetes, Clostridia
C2M2 60 Coriobacteriales Methanocorpusculum Clostridia, Bacteroidetes, Spirochaetes
C2M4 9    Clostridia, Sphaerochaeta, Bacilli, Actinobacteria
C2M5 29 Bacteroidales, Syntrophus, Syntrophomonas, Treponema Methanosaeta Spirochaetes, Bacteroidetes, Deltaproteobacteria, Clostridia, Chloroflexi, Euryarchaeota
C2M6 22   Methanogenium Clostridia, Spirochaetes, Bacteroidetes
C2M8 33    Clostridia, Spirochaetes, Bacteroidetes