Non-cyanobacterial diazotrophs: global diversity, distribution, ecophysiology, and activity in marine waters.

ABSTRACT: Biological dinitrogen (N2) fixation supplies nitrogen to the oceans, supporting primary productivity, and is carried out by some bacteria and archaea referred to as diazotrophs. Cyanobacteria are conventionally considered to be the major contributors to marine N2 fixation, but non-cyanobacterial diazotrophs (NCDs) have been shown to be distributed throughout ocean ecosystems. However, the biogeochemical significance of marine NCDs has not been demonstrated. This review synthesizes multiple datasets, drawing from cultivation-independent molecular techniques and data from extensive oceanic expeditions, to provide a comprehensive view into the diversity, biogeography, ecophysiology, and activity of marine NCDs. A NCD nifH gene catalog was compiled containing sequences from both PCR-based and

SUBMITTER: Turk-Kubo KA 

PROVIDER: S-EPMC10719068 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature