ProteobacteriaRNA, Ribosomal, 16SPhylogenyBacteriaDNA, BacterialDNA, RibosomalAlphaproteobacteriaSequence Analysis, DNAMolecular Sequence DataMetagenomeGammaproteobacteriaBetaproteobacteriaBacteroidetesGenes, rRNASeawaterWater MicrobiologySoil MicrobiologyActinobacteriaRNA, BacterialEpsilonproteobacteriaBiodiversityFusobacteriaArchaeaGeologic SedimentsCytophagaBiotaBase CompositionMetagenomicsMicrobiotaRhodobacterNitrosomonasGenome, BacterialSewageFresh WaterEcosystemBradyrhizobiaceaeBacteria, AerobicGram-Negative Facultatively Anaerobic RodsBase SequencePoriferaAcidobacteriaEvolution, MolecularGram-Negative Aerobic Rods and CocciDeltaproteobacteriaSulfonium CompoundsBacterial ProteinsGram-Negative BacteriaBiodegradation, EnvironmentalGenes, BacterialPlanktonGastrointestinal TractSymbiosisChloroflexiRhizosphereEnvironmental MicrobiologyGram-Negative Aerobic BacteriaBacterial Physiological PhenomenaDNA, ArchaealSpecies SpecificityGallionellaceaeMoritellaCluster AnalysisPolymerase Chain ReactionInvertebratesCrenarchaeotaGene Transfer, HorizontalDenaturing Gradient Gel ElectrophoresisThiotrichaceaeArctic RegionsBioreactorsSequence Homology, Nucleic AcidFatty AcidsWaste Disposal, FluidMicrobial ConsortiaGram-Negative Chemolithotrophic BacteriaMarine BiologyAerobiosisEukaryotaSequence AlignmentFungiPseudomonadaceaeAmino Acid SequenceFlavobacteriumSulfur-Reducing BacteriaCnidariaAnnelidaDysbiosisAnaerobiosisAzoarcusBacteria, AnaerobicBiological EvolutionGene Expression Regulation, BacterialFoot RotMethaneOxidation-ReductionCaulobacterAntarctic RegionsNitrogen FixationAtlantic OceanWaste Management