TABLE 4.

Contribution of 16S rRNA and 16S rRNA genes from members of different phyla and subphylum groups (class, subdivision, or subclass) to soil bacterial communitiesa

PhylumSubphylumMean contribution (%)Range (%)
Acidobacteria Subdivision 13.30-14.4
Subdivision 20.50-3.3
Subdivision 31.80-4.9
Subdivision 47.70-35.0
Subdivision 50.40-2.2
Subdivision 64.50-12.8
Subdivision 71.50-7.4
Actinobacteria Acidimicrobidae 2.40-8.9
Actinobacteridae 4.70-18.3
Rubrobacteridae 5.60-24.8
Proteobacteria Alphaproteobacteria 18.81.8-43.1
Betaproteobacteria 10.02.1-31.1
Gammaproteobacteria 8.11.1-34.1
Deltaproteobacteria 2.30-10.1
Epsilonproteobacteria 0.040-0.8
Verrucomicrobia Verrucomicrobiae 0.030-0.7
Spartobacteria 6.30-21.1
Subdivision 30.50-4.7
Subdivision 40.20-1.1
Bacteroidetes Flavobacteria 0.40-3.2
Sphingobacteria 4.60-15.9
Firmicutes Bacilli 1.60-7.0
Clostridia 0.20-1.4
Chloroflexi 3.20-15.8
Planctomycetes 2.00-7.8
Gemmatimonadetes 2.00-3.7
Other groups5.22.2-9.9
Unknown2.40-12.6
  • a Only the 21 libraries with ≥90 clones were included in this survey (total, 2,920 clones).