PlanktonSeawaterSulfonium CompoundsFresh WaterBacteriaEcosystemRNA, Ribosomal, 16SActinobacteriaCytophagaNorth SeaWater MicrobiologyAlphaproteobacteriaBacteroidetesBetaproteobacteriaMarine BiologyBaysLakesHeterotrophic ProcessesPhytoplanktonAtlantic OceanRoseobacterPhylogenyProteobacteriaVerrucomicrobiaSalinityDenaturing Gradient Gel ElectrophoresisGammaproteobacteriaPolynesiaBiodiversityDNA, BacterialOceans and SeasClimatic ProcessesBody CompositionMediterranean SeaDNA, RibosomalBiotaAntarctic RegionsSequence Analysis, DNAVibrionaceaeBacterial Physiological PhenomenaMolecular Sequence DataSeasonsAquatic OrganismsColony Count, MicrobialCrenarchaeotaPacific OceanIn Situ Hybridization, FluorescencePhosphorus CompoundsMetagenomicsHydrologyAutotrophic ProcessesArctic RegionsRNA, BacterialCarbonBiomassSeaweedRhodobacteraceaeDNA, Ribosomal SpacerRiversDNA FingerprintingGenes, rRNACoral ReefsArchaeaPhosphorusEukaryotaOrganic ChemicalsRhodophytaElectrophoresisPolymorphism, Restriction Fragment LengthCulture MediaRNA, Ribosomal, 5SAltitudeRNA, RibosomalGene LibraryGeographyGenome, BacterialFatty AcidsBase SequencePolymerase Chain ReactionPopulation DynamicsGenetic VariationBase CompositionRNA, Ribosomal, 23SAmino AcidsPhospholipidsBacterial ProteinsGenes, BacterialFlow CytometryDNA PrimersLipidsCloning, MolecularAdipose TissueMembrane LipidsChromatography, GasBody Weight