气候变化领域集成服务门户(CCPortal): Small sinking particles control anammox rates in the Peruvian oxygen minimum zone

CCPortal

DOI	10.1038/s41467-021-23340-4
	Small sinking particles control anammox rates in the Peruvian oxygen minimum zone
	Karthäuser C.; Ahmerkamp S.; Marchant H.K.; Bristow L.A.; Hauss H.; Iversen M.H.; Kiko R.; Maerz J.; Lavik G.; Kuypers M.M.M.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Anaerobic oxidation of ammonium (anammox) in oxygen minimum zones (OMZs) is a major pathway of oceanic nitrogen loss. Ammonium released from sinking particles has been suggested to fuel this process. During cruises to the Peruvian OMZ in April–June 2017 we found that anammox rates are strongly correlated with the volume of small particles (128–512 µm), even though anammox bacteria were not directly associated with particles. This suggests that the relationship between anammox rates and particles is related to the ammonium released from particles by remineralization. To investigate this, ammonium release from particles was modelled and theoretical encounters of free-living anammox bacteria with ammonium in the particle boundary layer were calculated. These results indicated that small sinking particles could be responsible for ~75% of ammonium release in anoxic waters and that free-living anammox bacteria frequently encounter ammonium in the vicinity of smaller particles. This indicates a so far underestimated role of abundant, slow-sinking small particles in controlling oceanic nutrient budgets, and furthermore implies that observations of the volume of small particles could be used to estimate N-loss across large areas. © 2021, The Author(s).
语种	英语
scopus关键词	carbon; chlorophyll a; nitrogen; organic nitrogen; oxygen; particulate organic matter; surface water; ammonium derivative; sea water; ammonium compound; anoxic conditions; boundary layer; nutrient budget; oxidation; oxygen minimum layer; remineralization; anaerobic ammonium oxidation; anaerobic metabolism; Article; boundary layer; budget; comparative study; controlled study; limit of detection; nonhuman; nutrient; particle resuspension; particle size; Peruvian; photosynthetically active radiation; physical chemistry; sea surface temperature; total organic carbon; anaerobic growth; bacterium; chemistry; metabolism; microbiology; nitrogen cycle; oxidation reduction reaction; Peru; sea; Peru; Ammonium Compounds; Anaerobiosis; Bacteria; Nitrogen; Nitrogen Cycle; Oceans and Seas; Oxidation-Reduction; Peru; Seawater
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250685
作者单位	Max Planck Institute for Marine Microbiology, Bremen, Germany; MARUM—Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany; Max Planck Institute for Meteorology, Hamburg, Germany; Department of Biology, University of Southern Denmark, Odense, Denmark; Laboratoire d’Océanographie de Villefranche-sur-Mer, Villefranche-sur-Mer, France
推荐引用方式 GB/T 7714	Karthäuser C.,Ahmerkamp S.,Marchant H.K.,et al. Small sinking particles control anammox rates in the Peruvian oxygen minimum zone[J],2021,12(1).
APA	Karthäuser C..,Ahmerkamp S..,Marchant H.K..,Bristow L.A..,Hauss H..,...&Kuypers M.M.M..(2021).Small sinking particles control anammox rates in the Peruvian oxygen minimum zone.Nature Communications,12(1).
MLA	Karthäuser C.,et al."Small sinking particles control anammox rates in the Peruvian oxygen minimum zone".Nature Communications 12.1(2021).