Journal article
Sulfur oxidizers dominate carbon fixation at a biogeochemical hot spot in the dark ocean
The ISME Journal, Vol.7(12), pp.2349-2360
12/2013
DOI: 10.1038/ismej.2013.113
PMCID: PMC3834846
PMID: 23842654
Abstract
Bacteria and archaea in the dark ocean (>200 m) comprise 0.3-1.3 billion tons of actively cycled marine carbon. Many of these microorganisms have the genetic potential to fix inorganic carbon (autotrophs) or assimilate single-carbon compounds (methylotrophs). We identified the functions of autotrophic and methylotrophic microorganisms in a vent plume at Axial Seamount, where hydrothermal activity provides a biogeochemical hot spot for carbon fixation in the dark ocean. Free-living members of the SUP05/Arctic96BD-19 clade of marine gamma-proteobacterial sulfur oxidizers (GSOs) are distributed throughout the northeastern Pacific Ocean and dominated hydrothermal plume waters at Axial Seamount. Marine GSOs expressed proteins for sulfur oxidation (adenosine phosphosulfate reductase, sox (sulfur oxidizing system), dissimilatory sulfite reductase and ATP sulfurylase), carbon fixation (ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO)), aerobic respiration (cytochrome c oxidase) and nitrogen regulation (PII). Methylotrophs and iron oxidizers were also active in plume waters and expressed key proteins for methane oxidation and inorganic carbon fixation (particulate methane monooxygenase/methanol dehydrogenase and RuBisCO, respectively). Proteomic data suggest that free-living sulfur oxidizers and methylotrophs are among the dominant primary producers in vent plume waters in the northeastern Pacific Ocean.
Details
- Title: Subtitle
- Sulfur oxidizers dominate carbon fixation at a biogeochemical hot spot in the dark ocean
- Creators
- Timothy E Mattes - Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA, USABrook L NunnKatharine T MarshallGiora ProskurowskiDeborah S KelleyOrest E KawkaDavid R GoodlettDennis A HansellRobert M Morris
- Resource Type
- Journal article
- Publication Details
- The ISME Journal, Vol.7(12), pp.2349-2360
- Publisher
- England
- DOI
- 10.1038/ismej.2013.113
- PMID
- 23842654
- PMCID
- PMC3834846
- ISSN
- 1751-7370
- eISSN
- 1751-7370
- Grant note
- 1S10RR023044 / NCRR NIH HHS 5P30ES007033-12 / NIEHS NIH HHS P30 ES007033 / NIEHS NIH HHS S10 RR023044 / NCRR NIH HHS
- Language
- English
- Date published
- 12/2013
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9983992057402771
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