Mineralogical associations with soil carbon in managed wetland soils.
agricultural soils
aluminum
carbon loss
carbon sequestration
drained wetlands
iron
Journal
Global change biology
ISSN: 1365-2486
Titre abrégé: Glob Chang Biol
Pays: England
ID NLM: 9888746
Informations de publication
Date de publication:
Nov 2020
Nov 2020
Historique:
received:
09
03
2020
accepted:
30
07
2020
pubmed:
12
8
2020
medline:
15
4
2021
entrez:
12
8
2020
Statut:
ppublish
Résumé
Carbon (C)-rich wetland soils are often drained for agriculture due to their capacity to support high net primary productivity. Increased drainage is expected this century to meet the agricultural demands of a growing population. Wetland drainage can result in large soil C losses and the concentration of residual soil minerals such as iron (Fe) and aluminum (Al). In upland soils, reactive Fe and Al minerals can contribute to soil C accumulation through sorption to poorly crystalline minerals and coprecipitation of organo-metal complexes, as well as C loss via anaerobic respiration by Fe-reducing bacteria. The role of these minerals in soil C dynamics is often overlooked in managed wetland soils and may be particularly important in both drained and reflooded systems with elevated mineral concentrations. Reflooding drained soils have been proposed as a means to sequester C for climate change mitigation, yet little is known about how reactive Fe and Al minerals affect C cycling in restored wetlands. We explored the interactions among soil C and reactive Fe and Al minerals in drained and reflooded wetland soils. In reflooded soils, soil C was negatively associated with reactive Fe and reduced Fe(II), a proxy for anaerobic conditions (reactive Fe: R
Substances chimiques
Minerals
0
Soil
0
Carbon
7440-44-0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
6555-6567Subventions
Organisme : Jewish Community Foundation
Organisme : V. Kann Rasmussen Foundation
Organisme : McIntire Stennis
ID : CA- B-ECO-7673-MS
Organisme : Oak Creek Foundation
Organisme : Breakthrough Strategies & Solutions
Organisme : Trisons Foundation
Organisme : Northern Trust Foundation
Organisme : California Department of Water Resources
ID : 4600011240
Organisme : California Sea Grant
ID : R/SF-89
Organisme : Delta Stewardship Council
ID : 5298
Informations de copyright
© 2020 John Wiley & Sons Ltd.
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