BetaproteobacteriaProteobacteriaRNA, Ribosomal, 16SPhylogenyDNA, RibosomalBacteriaComamonadaceaeSequence Analysis, DNASoil MicrobiologyNeisseriaceaeDNA, BacterialAlphaproteobacteriaGammaproteobacteriaFresh WaterGenes, rRNABiodiversityMolecular Sequence DataActinobacteriaBiotaOxalobacteraceaeWater MicrobiologyLeptothrixGeologic SedimentsRNA, BacterialMetagenomeSewageAlcaligenaceaeBurkholderiaceaeNitrosomonadaceaeSeawaterArchaeaBase CompositionRhizosphereBacteroidetesDenaturing Gradient Gel ElectrophoresisVerrucomicrobiaSymbiosisCluster AnalysisEcosystemFatty AcidsBiodegradation, EnvironmentalBurkholderiaQuinonesEpsilonproteobacteriaGenome, BacterialBacterial Typing TechniquesSoil PollutantsAerobiosisHemipteraFusobacteriaNitratesOxidation-ReductionSoilSequence Homology, Nucleic AcidRhodobacterIn Situ Hybridization, FluorescenceNitrosomonasOxidoreductasesSpecies SpecificityColony Count, MicrobialBradyrhizobiaceaeGram-Negative Facultatively Anaerobic RodsNucleic Acid HybridizationDeltaproteobacteriaPolymerase Chain ReactionSulfonium CompoundsCytophagaBacteria, AerobicMicrobiotaBacterial ProteinsMetagenomicsGram-Negative BacteriaGram-Negative Aerobic BacteriaBase SequenceGenes, BacterialGram-Negative Aerobic Rods and CocciKoreaPlanktonGallionellaceaeMoritellaThiotrichaceaeEnvironmental MicrobiologyGram-Negative Chemolithotrophic BacteriaGastrointestinal TractPseudomonadaceaeArctic RegionsAcidobacteriaDNA, ArchaealAzoarcusGene Transfer, HorizontalFoot RotWaste Disposal, FluidBioreactorsCaulobacterEvolution, MolecularSulfur-Reducing BacteriaNitrogen FixationWaste ManagementBacterial Physiological PhenomenaGene Expression Regulation, Bacterial