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Major role of nitrite-oxidizing bacteria in dark ocean carbon fixation

by Woyke, Tanja , Record, Nicholas R. , Brown, Julia M. , Lopez-Garcia, Purificacion , Nunoura, Takuro , Bergauer, Kristin , Herndl, Gerhard J. , Hallam, Steven J. , Takaki, Yoshihiro , Sintes, Eva , Pachiadaki, Maria G. , Stepanauskas, Ramunas , Swan, Brandon K. , Mathyer, Mary Elizabeth

in Ammonium / Bacteria / Bacteria - cytology / Bacteria - genetics / Bacteria - metabolism / Carbohydrates / Carbon / Carbon - metabolism / Carbon Cycle / Carbon fixation / Chemoautotrophic bacteria / Chemoautotrophy / Darkness / Dissolved inorganic carbon / Energy sources / Fluorescence / Fluorescence in situ hybridization / Genomes / In Situ Hybridization, Fluorescence / Inhalants / Metagenomics / Microorganisms / Nitrites / Nitrites - metabolism / Oceans and Seas / Oxidation / Oxidation-Reduction / Oxidoreductase / Prokaryotes / Science & Technology - Other Topics / Seawater - microbiology / Single-Cell Analysis / Substrates / Tricarboxylic acid cycle

2017

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Major role of nitrite-oxidizing bacteria in dark ocean carbon fixation

2017

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Major role of nitrite-oxidizing bacteria in dark ocean carbon fixation

2017

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Journal Article

Major role of nitrite-oxidizing bacteria in dark ocean carbon fixation

Woyke, Tanja,

Record, Nicholas R.,

Brown, Julia M.,

Lopez-Garcia, Purificacion,

Nunoura, Takuro,

Bergauer, Kristin,

Herndl, Gerhard J.,

Hallam, Steven J.,

Takaki, Yoshihiro,

Sintes, Eva,

Pachiadaki, Maria G.,

Stepanauskas, Ramunas,

Swan, Brandon K.,

Mathyer, Mary Elizabeth

2017

Overview

Carbon fixation by chemoautotrophic microorganisms in the dark ocean has a major impact on global carbon cycling and ecological relationships in the ocean’s interior, but the relevant taxa and energy sources remain enigmatic. We show evidence that nitrite-oxidizing bacteria affiliated with the Nitrospinae phylum are important in dark ocean chemoautotrophy. Single-cell genomics and community metagenomics revealed that Nitrospinae are the most abundant and globally distributed nitrite-oxidizing bacteria in the ocean. Metaproteomics and metatranscriptomics analyses suggest that nitrite oxidation is the main pathway of energy production in Nitrospinae. Microautoradiography, linked with catalyzed reporter deposition fluorescence in situ hybridization, indicated that Nitrospinae fix 15 to 45% of inorganic carbon in the mesopelagic western North Atlantic. Nitrite oxidation may have a greater impact on the carbon cycle than previously assumed.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science,AAAS

Subject

Ammonium

/ Bacteria

/ Bacteria - cytology

/ Bacteria - genetics

/ Bacteria - metabolism

/ Carbohydrates

/ Carbon