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Vegetation Loss Following Vertical Drowning of Mississippi River Deltaic Wetlands Leads to Faster Microbial Decomposition and Decreases in Soil Carbon

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C. A. Creamer, M. P. Waldrop, C. L. Stagg, K. L. Manies, M. M. Baustian, C. Laurenzano, T. G. Aw, M. Haw, S. L. Merino, D. R. Schoolmaster Jr., S. Sevilgen, R. K. Villani, and E. J. Ward, 2024-04-15, Vegetation Loss Following Vertical Drowning of Mississippi River Deltaic Wetlands Leads to Faster Microbial Decomposition and Decreases in Soil Carbon: JGR Biogeosciences, v. 129, no. 4.

Summary

Wetland ecosystems hold nearly a third of the global soil carbon pool, but as wetlands rapidly disappear the fate of this stored soil carbon is unclear. The aim of this study was to quantify and then link potential rates of microbial decomposition after vertical drowning of vegetated tidal marshes in coastal Louisiana to known drivers of anaerobic decomposition altered by vegetation loss. Profiles of potential CH4 and CO2 production (surface to 60 cm deep) were measured during anaerobic incubations, organic matter chemistry was assessed with infrared spectroscopy, and soil porewater nutrients and redox potentials were measured in the field along a chronosequence of wetland loss. After vertical drowning, pond soils had lower redox potentials, [...]

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  • National and Regional Climate Adaptation Science Centers
  • South Central CASC

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citationTypeJournal Article
journalJGR Biogeosciences
parts
typeDOI
valuehttps://doi.org/10.1029/2023JG007832
typeVolume
value129
typeNumber
value4

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