Geologic SedimentsSeawaterFresh WaterWater MicrobiologyRNA, Ribosomal, 16SWater Pollutants, ChemicalRiversDNA, RibosomalPhylogenyBacteriaMethaneBiodegradation, EnvironmentalDeltaproteobacteriaSulfur-Reducing BacteriaArchaeaDNA, BacterialEstuariesOceans and SeasDNA, ArchaealSequence Analysis, DNAEcosystemLakesGenes, rRNAWater Pollution, ChemicalPacific OceanRhizophoraceaeBiodiversitySoil MicrobiologyAnaerobiosisMolecular Sequence DataWater PollutantsWetlandsUraniumWater PollutionEnvironmental MonitoringBase CompositionGeologySulfatesArctic RegionsEutrophicationBacteria, AnaerobicRNA, BacterialWater Pollutants, RadioactiveGammaproteobacteriaAroclorsSoil PollutantsWater MovementsPolycyclic Hydrocarbons, AromaticOxidation-ReductionBiotaPetroleumGroundwaterBaysSulfidesHumic SubstancesMarine BiologyCarbonPaleontologyMetals, HeavyCrenarchaeotaForaminiferaProteobacteriaFatty AcidsAntarctic RegionsThiotrichaceaeBacterial Typing TechniquesSoilHydrocarbonsChlorophenols