TY - JOUR
T1 - Nitrite Oxidation Across the Full Oxygen Spectrum in the Ocean
AU - Sun, Xin
AU - Frey, Claudia
AU - Ward, Bess B.
N1 - Funding Information:
We thank all the crew and scientists on R/V Meteor and R/V Sally Ride for assistance. XS was supported by the Simons Foundation postdoctoral fellowship in marine microbial ecology. CF was supported by the German Academic Exchange Service (DAAD) program Postdoctoral Researchers International Mobility Experience (PRIME, ID 57350888). This work was funded by NSF OCE‐1657663 and NSF OCE‐1946516 to BBW, and the R/V Meteor cruise was supported by the DFG‐funded Collaborative Research Center 754 (SFB754) phase III ( http://www.sfb754.de , last access: 25. July 2022).
Funding Information:
We thank all the crew and scientists on R/V Meteor and R/V Sally Ride for assistance. XS was supported by the Simons Foundation postdoctoral fellowship in marine microbial ecology. CF was supported by the German Academic Exchange Service (DAAD) program Postdoctoral Researchers International Mobility Experience (PRIME, ID 57350888). This work was funded by NSF OCE-1657663 and NSF OCE-1946516 to BBW, and the R/V Meteor cruise was supported by the DFG-funded Collaborative Research Center 754 (SFB754) phase III (http://www.sfb754.de, last access: 25. July 2022).
Publisher Copyright:
© 2023. American Geophysical Union. All Rights Reserved.
PY - 2023/4
Y1 - 2023/4
N2 - Fixed nitrogen limits primary productivity in most areas of the surface ocean. Nitrite oxidation is the main source of nitrate, the most abundant form of inorganic fixed nitrogen. Even though known as an aerobic process, nitrite oxidation is not always stimulated by increased oxygen concentration, and nitrite oxidation occurs in layers of oxygen minimum zones (OMZs) where oxygen is not detectable. Nitrite-oxidizing bacteria, known since their original isolation as aerobes, were also detected in these layers. Whether and how nitrite oxidation is occurring in the anoxic seawater is debated. Here, we reassess recent advances in marine nitrite oxidation in OMZ regions using previous work and new data sets we collected in two Pacific OMZs. We analyze the complex relationship between nitrite oxidation and oxygen. We discuss potential mechanisms explaining nitrite oxidation in different layers of OMZs based on recent findings and propose future directions to resolve the controversial question of apparently anaerobic nitrite oxidation in anoxic layers.
AB - Fixed nitrogen limits primary productivity in most areas of the surface ocean. Nitrite oxidation is the main source of nitrate, the most abundant form of inorganic fixed nitrogen. Even though known as an aerobic process, nitrite oxidation is not always stimulated by increased oxygen concentration, and nitrite oxidation occurs in layers of oxygen minimum zones (OMZs) where oxygen is not detectable. Nitrite-oxidizing bacteria, known since their original isolation as aerobes, were also detected in these layers. Whether and how nitrite oxidation is occurring in the anoxic seawater is debated. Here, we reassess recent advances in marine nitrite oxidation in OMZ regions using previous work and new data sets we collected in two Pacific OMZs. We analyze the complex relationship between nitrite oxidation and oxygen. We discuss potential mechanisms explaining nitrite oxidation in different layers of OMZs based on recent findings and propose future directions to resolve the controversial question of apparently anaerobic nitrite oxidation in anoxic layers.
KW - marine oxygen minimum zones
KW - nitrite oxidation
KW - nitrite-oxidizing bacteria
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U2 - 10.1029/2022GB007548
DO - 10.1029/2022GB007548
M3 - Comment/debate
AN - SCOPUS:85153871308
SN - 0886-6236
VL - 37
JO - Global Biogeochemical Cycles
JF - Global Biogeochemical Cycles
IS - 4
M1 - e2022GB007548
ER -