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Simultaneous measurements of dissolved CH4 and H2 in wetland soils

  • David S. Pal
  • Rajan Tripathee
  • Matthew C. Reid
  • Karina V. R. Schäfer
  • Peter R. Jaffé
Article

Abstract

Biogeochemical processes in wetland soils are complex and are driven by a microbiological community that competes for resources and affects the soil chemistry. Depending on the availability of various electron acceptors, the high carbon input to wetland soils can make them important sources of methane production and emissions. There are two significant pathways for methanogenesis: acetoclastic and hydrogenotrophic methanogenesis. The hydrogenotrophic pathway is dependent on the availability of dissolved hydrogen gas (H2), and there is significant competition for available H2. This study presents simultaneous measurements of dissolved methane and H2 over a 2-year period at three tidal marshes in the New Jersey Meadowlands. Methane reservoirs show a significant correlation with dissolved organic carbon, temperature, and methane emissions, whereas the H2 concentrations measured with dialysis samplers do not show significant relationships with these field variables. Data presented in this study show that increased dissolved H2 reservoirs in wetland soils correlate with decreased methane reservoirs, which is consistent with studies that have shown that elevated levels of H2 inhibit methane production by inhibiting propionate fermentation, resulting in less acetate production and hence decreasing the contribution of acetoclastic methanogenesis to the overall production of methane.

Keywords

Methane Hydrogen Wetlands Sediments 

Notes

Funding information

This work was supported by the CBET-1133074, CBET 1033639, CBET 1133275, CBET 1311713, CBET 1033451, CBET 1311547, and CBET-1133281, NSF Collaborative Research: RAPID Award no. 1311796.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • David S. Pal
    • 1
  • Rajan Tripathee
    • 2
  • Matthew C. Reid
    • 3
  • Karina V. R. Schäfer
    • 2
  • Peter R. Jaffé
    • 1
  1. 1.Department of Civil and Environmental EngineeringPrinceton UniversityPrincetonUSA
  2. 2.Department of Biological SciencesRutgers UniversityNewarkUSA
  3. 3.School of Civil and Environmental EngineeringCornell UniversityIthacaUSA

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