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Anaerobic Ammonium Oxidation in the Peruvian Oxygen Minimum Zone

M. Robert Hamersley ; Lavik, Gaute ; Woebken, Dagmar ; Jayne E. Rattray ; Lam, Phyllis ; Hopmans, Ellen C. ; Jaap S. Sinninghe Damsté ; Siegfried Krüger ; Graco, Michelle ; Gutiérrez, Dimitri ; Marcel M. M. Kuypers

Limnology and oceanography, 2007-05, Vol.52 (3), p.923-933 [Periódico revisado por pares]

Waco, TX: The American Society of Limnology and Oceanography

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Título:
Anaerobic Ammonium Oxidation in the Peruvian Oxygen Minimum Zone
Autor: M. Robert Hamersley ; Lavik, Gaute ; Woebken, Dagmar ; Jayne E. Rattray ; Lam, Phyllis ; Hopmans, Ellen C. ; Jaap S. Sinninghe Damsté ; Siegfried Krüger ; Graco, Michelle ; Gutiérrez, Dimitri ; Marcel M. M. Kuypers
Assuntos: Animal and plant ecology ; Animal, plant and microbial ecology ; Bacteria ; Biological and medical sciences ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Fundamental and applied biological sciences. Psychology ; Geochemistry ; Isotope geochemistry ; Isotope geochemistry. Geochronology ; Lipids ; Marine ; Mineralogy ; Nitrates ; Nitrites ; Oxidation ; Oxygen ; Quaternary ammonium compounds ; Sea water ; Sea water ecosystems ; Silicates ; Surface water ; Synecology ; Upwelling water ; Water geochemistry
É parte de: Limnology and oceanography, 2007-05, Vol.52 (3), p.923-933
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: We investigated the microbial pathways of nitrogen (N) loss in an April 2005 transect through the Peruvian oxygen minimum zone (OMZ) at $12\textdegree S$ latitude using short anaerobic incubations with $^{15}N-labeled$ substrates and molecular-ecological and lipid-biomarker studies. In incubations with 15NH4+, immediate production of $^{14}N^{15}N$, but not $^{15}N^{15}N$, indicated that N2 was produced by the pairing of labeled 15NH4+ with in situ $^{14}NO_2^-$ via anaerobic ammonium oxidation (anammox). Supporting this finding, we also found anammox-related 16S ribosomal ribonucleic acid gene sequences similar to those previously known from other marine water columns in which anammox activity was measured. We identified and enumerated anammox bacteria via fluorescence in situ hybridization and quantitative polymerase chain reaction and found ladderane membrane lipids specific to anammox bacteria wherever anammox activity was measured by our isotope tracer method. However, in incubations with 15NO3- or $^{15}NO_2^-$, in which denitrification would have been expected to produce $^{15}N^{15}N$ by pairing of oxidized 15N ions, $^{15}N^{15}N$ production was not detected before 24 h, showing that denitrification of fixed N to N2 was not taking place in our samples. At the time and locality of our study, anammox, rather than denitrification, was responsible for N2 production in the Peruvian OMZ waters.
Editor: Waco, TX: The American Society of Limnology and Oceanography
Idioma: Inglês

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Anaerobic Ammonium Oxidation in the Peruvian Oxygen Minimum Zone

M. Robert Hamersley ; Lavik, Gaute ; Woebken, Dagmar ; Jayne E. Rattray ; Lam, Phyllis ; Hopmans, Ellen C. ; Jaap S. Sinninghe Damsté ; Siegfried Krüger ; Graco, Michelle ; Gutiérrez, Dimitri ; Marcel M. M. Kuypers

Waco, TX: The American Society of Limnology and Oceanography

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