Ice CoverIceArctic RegionsSaxifragaceaeMummiesGreenlandSnowPlanococcaceaeAntarctic RegionsCold ClimatePoaRNA, Ribosomal, 16SHydrologyDNA, RibosomalGlobal WarmingPhylogenyAltitudeFlavobacteriumBacteriaClimate ChangeRiversMarsAustriaAlaskaDNA, BacterialBiodiversitySoil MicrobiologyExtraterrestrial EnvironmentSequence Analysis, DNAEcosystemCold TemperatureHistory, AncientMolecular Sequence DataBacterial Typing TechniquesSoilDenaturing Gradient Gel ElectrophoresisClimateChinaActinomycetalesFatty AcidsGeologic SedimentsBase CompositionGeographyGenes, rRNASeasonsCluster AnalysisSulfatesRNA, BacterialTemperaturePolymorphism, Restriction Fragment LengthPhenotypeGenetic Variation