Anaerobic Metabolism in Tidal Freshwater Wetlands: III. Temperature Regulation of Iron Cycling

dc.contributor.authorBullock, Allyson L.
dc.contributor.authorSutton-Grier, Ariana E.
dc.contributor.authorMegonigal, J. Patrick
dc.date.accessioned2013-06-04T17:46:24Z
dc.date.available2013-06-04T17:46:24Z
dc.date.issued2013
dc.description.abstractUnderstanding the ecological processes that regulate the production and fate of methane (CH 4 ) in wetland soils is essential for forecasting wetland CH 4 emissions. Iron reduction is an important carbon mineralization pathway that is capable of suppressing CH 4 production in freshwater wetlands, but our understanding of temperature regulation of iron oxide respiration and the subsequent impacts on CH 4 production is limited. We tested the hypothesis that temperature regulates iron reduction rates indirectly through differential effects on Fe(II) oxidation versus Fe(III) reduction, which ultimately determines the size of the microbially labile, poorly crystalline Fe(III) pool. Our study indicates that rates of iron reduction are more sensitive to changes in temperature than rates of iron oxidation, which creates imbalance in the relative proportion of Fe(II) and Fe(III) in the poorly crystalline soil iron pool as temperatures change. Our results suggest that warmer temperatures can cause the Fe(III) oxide pool to decline, limiting the Fe(III) supply to iron reducers and relieving competition for organic carbon with methanogens.
dc.format.extent482–490
dc.identifier1559-2723
dc.identifier.citationBullock, Allyson L., Sutton-Grier, Ariana E., and Megonigal, J. Patrick. 2013. "<a href="https://repository.si.edu/handle/10088/20878">Anaerobic Metabolism in Tidal Freshwater Wetlands: III. Temperature Regulation of Iron Cycling</a>." <em>Estuaries and Coasts</em>, 36, (3) 482–490. <a href="https://doi.org/10.1007/s12237-012-9536-5">https://doi.org/10.1007/s12237-012-9536-5</a>.
dc.identifier.issn1559-2723
dc.identifier.urihttp://hdl.handle.net/10088/20878
dc.publisherSpringer
dc.relation.ispartofEstuaries and Coasts 36 (3)
dc.titleAnaerobic Metabolism in Tidal Freshwater Wetlands: III. Temperature Regulation of Iron Cycling
dc.typearticle
sro.description.unitSERC
sro.identifier.doi10.1007/s12237-012-9536-5
sro.identifier.itemID112528
sro.identifier.refworksID31578
sro.identifier.urlhttps://repository.si.edu/handle/10088/20878

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