Nearly identical 16S rRNA sequences recovered from lakes in North America and Europe indicate the existence of clades of globally distributed freshwater bacteria

摘要: Summary We compared bacterial 16S ribosomal RNA gene sequences recovered from Lake Loosdrecht, the Netherlands, to reported lakes in Alaska and New York State. In each of three lake systems, which differ pH trophic state, some sequence types were found without related (sequence identity Actinomycetes Verrucomicrobia radiations more closely data set than any other global databases. However, most striking similarities subdivisions alpha beta Proteobacteria . these different clusters highly bacteria identified (97–100% identity) that represented all regions. The contained no members freshwater bacteria. One cluster falls within a monophyletic aquatic supergroup apparently diverged early evolution into an exclusive marine cluster, so-called SAR11 cluster. detection clades distinguished by geographic distance as well physical chemical diversity suggests organisms are dispersed globally they possess unique functional capabilities enabling successful competition wide range environments.