Geologic SedimentsLakesFresh WaterGreat Lakes RegionWater MicrobiologySeawaterRNA, Ribosomal, 16SWater Pollutants, ChemicalPhylogenyDNA, RibosomalEutrophicationRiversEcosystemSequence Analysis, DNAMethaneDNA, BacterialGenes, rRNABacteriaBiodiversityWater Pollution, ChemicalDNA, ArchaealDeltaproteobacteriaSulfur-Reducing BacteriaArchaeaZooplanktonBiodegradation, EnvironmentalMolecular Sequence DataWater PollutantsPhytoplanktonEnvironmental MonitoringWater PollutionCichlidsAntarctic RegionsOceans and SeasWetlandsEstuariesSoil MicrobiologyBase CompositionAnaerobiosisPacific OceanRhizophoraceaeWater MovementsArctic RegionsGeologyGammaproteobacteriaHumic SubstancesPlanktonRNA, BacterialBiotaSodium ChlorideUraniumCarbonSalinityPaleontologyBacteria, AnaerobicProteobacteriaFishesSulfidesSeasonsSulfatesWater Pollutants, RadioactiveOxidation-ReductionAfrica, EasternPolycyclic Hydrocarbons, AromaticSoil PollutantsBacterial Typing TechniquesAroclorsBiomassFatty AcidsCrenarchaeotaChinaPerchesBaysMicrocystisMarine BiologyBetaproteobacteriaGroundwaterPetroleumSewageCluster AnalysisMetals, HeavyAquatic OrganismsRNA, ArchaealDiatomsSoilOrganic ChemicalsTemperatureEukaryotaWater QualityGeographyBacteroidetesAerobiosisHydrocarbonsSulfurHydrocharitaceaeActinobacteriaFossilsEcologyBathing BeachesMethanosarcinales