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

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dc.contributor.author Keller, Jason K. en
dc.contributor.author Sutton-Grier, Ariana E. en
dc.contributor.author Bullock, Allyson L. en
dc.contributor.author Megonigal, J. Patrick en
dc.date.accessioned 2013-06-04T17:46:30Z
dc.date.available 2013-06-04T17:46:30Z
dc.date.issued 2013
dc.identifier.citation Keller, Jason K., Sutton-Grier, Ariana E., Bullock, Allyson L., and Megonigal, J. Patrick. 2013. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F20882">Anaerobic Metabolism in Tidal Freshwater Wetlands: I. Plant Removal Effects on Iron Reduction and Methanogenesis</a>." <em>Estuaries and Coasts</em>. 36 (3):457&ndash;470. <a href="https://doi.org/10.1007/s12237-012-9527-6">https://doi.org/10.1007/s12237-012-9527-6</a> en
dc.identifier.issn 1559-2723
dc.identifier.uri http://hdl.handle.net/10088/20882
dc.description.abstract 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. Plants can mediate this microbial competition by releasing oxygen into the rhizosphere and supplying oxidized iron for iron reducers. We utilized a plant removal experiment in two wetland sites to test the hypothesis that, in the absence of plants, rates of iron reduction would be diminished, allowing methanogenesis to dominate anaerobic metabolism. In both sites, methanogenesis was the primary anaerobic mineralization pathway, with iron reduction dominating only early and late in the growing season in the site with a less organic soil. These patterns were not influenced by the presence of plants, demonstrating that plants were not a key control of microbial metabolism. Instead, we suggest that site conditions, including soil chemistry, and temperature are important controls of the pathways of anaerobic metabolism. en
dc.relation.ispartof Estuaries and Coasts en
dc.title Anaerobic Metabolism in Tidal Freshwater Wetlands: I. Plant Removal Effects on Iron Reduction and Methanogenesis en
dc.type Journal Article en
dc.identifier.srbnumber 112281
dc.identifier.doi 10.1007/s12237-012-9527-6
rft.jtitle Estuaries and Coasts
rft.volume 36
rft.issue 3
rft.spage 457
rft.epage 470
dc.description.SIUnit SERC en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 457
dc.citation.epage 470


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