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Table 2 Ratio of the phyla Firmicutes vs. Bacteroidetes in biogas fermenters and herbivorous animals

From: Deep metagenome and metatranscriptome analyses of microbial communities affiliated with an industrial biogas fermenter, a cow rumen, and elephant feces reveal major differences in carbohydrate hydrolysis strategies

Microbiome/community Firmicutes/Bacteroidetes phyla ratio Reference/data source
16S amplicon-based analysis Metagenome-based analysis
Biogas fermenter 2.4:1 5.2:1 This study
Biogas fermenter 4.7:1 [25]
Biogas fermenter (dry fermentation) 4.1:1 [3]
Biogas fermenter (wet fermentation) 3.9:1 [3]
Biogas fermenter 9.6:1 5.9:1 [4]
Biogas fermenter 9.6:1 [2]
Mean 6:1 5.6:1  
Asian elephant feces 0.8:1 1.6:1 [15]
Switchgrass incubated in cow rumen 1.5:1 [23]
Rumen of a hay-fed cow 0.8–1.7:1 [14]
Svalbard reindeer Rumen 0.5:1 0.4:1 [18]
White rhinoceros feces 1.6–2.7:1 [24]
Rex rabbit feces 0.8–1.3:1 [16]
Rumen of a pasture-fed sheep 0.3–0.5:1 [14]
Giraffe rumen 1.6:1 [17]
Mean 1:1 1.2:1  
  1. The data are based on the data sets published in the indicated references or on data produced in this study