Global nitrogen cycle: critical enzymes, organisms, and processes for nitrogen budgets and dynamics

X Zhang, BB Ward, DM Sigman - Chemical reviews, 2020 - ACS Publications
Nitrogen (N) is used in many of life's fundamental biomolecules, and it is also a participant in
environmental redox chemistry. Biogeochemical processes control the amount and form of N …

Processes and microorganisms involved in the marine nitrogen cycle: knowledge and gaps

S Pajares, R Ramos - Frontiers in Marine Science, 2019 - frontiersin.org
Nitrogen (N) is a key element for life in the oceans. It controls primary productivity in many
parts of the global ocean, consequently playing a crucial role in the uptake of atmospheric …

[HTML][HTML] Global oceanic diazotroph database version 2 and elevated estimate of global oceanic N fixation

Z Shao, Y Xu, H Wang, W Luo, L Wang… - Earth System …, 2023 - essd.copernicus.org
Marine diazotrophs convert dinitrogen (N 2) gas into bioavailable nitrogen (N), supporting
life in the global ocean. In 2012, the first version of the global oceanic diazotroph database …

The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle

C Martínez-Pérez, W Mohr, CR Löscher… - Nature …, 2016 - nature.com
Abstract Microbial dinitrogen (N 2) fixation, the nitrogenase enzyme-catalysed reduction of N
2 gas into biologically available ammonia, is the main source of new nitrogen (N) in the …

Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean

K Harding, KA Turk-Kubo, RE Sipler… - Proceedings of the …, 2018 - National Acad Sciences
Biological dinitrogen (N2) fixation is an important source of nitrogen (N) in low-latitude open
oceans. The unusual N2-fixing unicellular cyanobacteria (UCYN-A)/haptophyte symbiosis …

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

KA Turk-Kubo, MR Gradoville, S Cheung… - FEMS microbiology …, 2023 - academic.oup.com
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 …

Marine non-cyanobacterial diazotrophs: moving beyond molecular detection

D Bombar, RW Paerl, L Riemann - Trends in microbiology, 2016 - cell.com
The nitrogen input through biological N 2 fixation is essential for life in vast areas of the
global ocean. The belief is that cyanobacteria are the only relevant N 2-fixing (diazotrophic) …

Microbial nitrogen cycling in estuaries: from genes to ecosystem processes

J Damashek, CA Francis - Estuaries and Coasts, 2018 - Springer
Nitrogen (N) is one of the primary nutrients required to build biomass and is therefore in high
demand in aquatic ecosystems. Estuaries, however, are frequently inundated with high …

Revisiting the distribution of oceanic N2 fixation and estimating diazotrophic contribution to marine production

W Tang, S Wang, D Fonseca-Batista, F Dehairs… - Nature …, 2019 - nature.com
Marine N2 fixation supports a significant portion of oceanic primary production by making N2
bioavailable to planktonic communities, in the process influencing atmosphere-ocean …

Biological nitrogen fixation detected under Antarctic sea ice

T Shiozaki, A Fujiwara, K Inomura, Y Hirose… - Nature …, 2020 - nature.com
Nitrogen fixation is the primary source of reactive nitrogen in the ocean. Most ecological
models do not predict nitrogen fixation in the Antarctic Ocean because of the low availability …