Browsing Smithsonian Environmental Research Center by Author "Keller, Jason K."

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Anaerobic Metabolism in Tidal Freshwater Wetlands: I. Plant Removal Effects on Iron Reduction and Methanogenesis

Keller, Jason K.; Sutton-Grier, Ariana E.; Bullock, Allyson L.; Megonigal, J. Patrick (2013)

For energetic reasons, iron reduction suppresses methanogenesis in tidal freshwater wetlands; however, when iron reduction is limited by iron oxide availability, methanogenesis dominates anaerobic carbon mineralization. ...
Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Sutton-Grier, Ariana E.; Keller, Jason K.; Koch, Rachel; Gilmour, Cynthia C.; Megonigal, J. Patrick (2011)

Anaerobic decomposition in wetland soils is carried out by several interacting microbial processes that influence carbon storage and greenhouse gas emissions. To understand the role of wetlands in the global carbon cycle, ...
Elevated CO<SUB>2</SUB> affects porewater chemistry in a brackish marsh

Keller, Jason K.; Wolf, Amelia A.; Weisenhorn, Pamela B.; Drake, Bert G.; Megonigal, J. Patrick (2009)

As atmospheric CO2 concentrations continue to rise and impact plant communities, concomitant shifts in belowground microbial processes are likely, but poorly understood. We measured monthly porewater concentrations of ...
Humic acids as electron acceptors in wetland decomposition

Keller, Jason K.; Weisenhorn, Pamela B.; Megonigal, J. Patrick (2009)

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