| quantitative distribution of presumptive archaeal and bacterial nitrifiers in monterey bay and the north pacific subtropical gyre. | the recent isolation of the ammonia-oxidizing crenarchaeon nitrosopumilus maritimus has expanded the known phylogenetic distribution of nitrifying phenotypes beyond the domain bacteria. to further characterize nitrification in the marine environment and explore the potential crenarchaeal contribution to this process, we quantified putative nitrifying genes and phylotypes in picoplankton genomic libraries and environmental dna samples from coastal and open ocean habitats. betaproteobacteria ammon ... | 2007 | 17472632 |