| lake superior supports novel clusters of cyanobacterial picoplankton. | very little is known about the biodiversity of freshwater autotrophic picoplankton (app) in the laurentian great lakes, a system comprising 20% of the world's lacustrine freshwater. in this study, the genetic diversity of lake superior app was examined by analyzing 16s rrna gene and cpcba pcr amplicons from water samples. by neighbor joining, the majority of 16s rrna gene sequences clustered within the "picocyanobacterial clade" consisting of freshwater and marine synechococcus and prochlorococc ... | 2007 | 17468271 |