Lignin and fungal abundance modify manganese effects on soil organic carbon persistence at the continental scale

Simple item page
dc.contributor.authorPossinger, Angela R.en
dc.contributor.authorHeckman, K. A.en
dc.contributor.authorBowman, M. M.en
dc.contributor.authorGallo, A. C.en
dc.contributor.authorHatten, J. A.en
dc.contributor.authorMatosziuk, L. M.en
dc.contributor.authorNave, L. E.en
dc.contributor.authorSanClements, M. D.en
dc.contributor.authorSwanston, C. W.en
dc.contributor.authorWeiglein, T. L.en
dc.contributor.authorStrahm, Brian D.en
dc.date.accessioned2023-05-25T19:07:39Zen
dc.date.available2023-05-25T19:07:39Zen
dc.date.issued2022-11en
dc.description.abstractManganese (Mn) may play an outsized role in soil biogeochemical cycles relative to its abundance. The role of Mn-facilitated oxidation of biomacromolecules during litter decomposition is well-established, but the balance between Mn-promoted soil organic carbon (SOC) oxidation and long-term SOC protection in mineral soils is unknown, especially in subsoils. In this study, we used soils collected across the US National Ecological Observatory Network (NEON) to assess the distribution of Mn and relationships between Mn abundance and SOC concentration, potential mineralization, and persistence at a continental spatial scale. Total reducible Mn was not spatially correlated to site moisture (Spearman's Rho = 0.24), highlighting that Mn abundance may influence SOC cycling independently from other moisture-driven soil chemical properties (e.g., reactive iron and aluminum). However, Mn effects on SOC cycling depended on depth, soil, or site-level properties. In particular, fungal:bacterial biomass ratio, proportion of SOC in the free light fraction, lignin abundance, and/or proportion of undegraded organic matter mediated the effect of Mn on SOC cycling metrics. For example, the effect of Mn on SOC concentration in subsoils shifted from positive (approximately +270 % relative to mean subsoil SOC) to negative (-125 %) with increasing fungal:bacterial ratio. We propose that convergence of high Mn, lignin-rich substrates, and fungal:bacterial ratio amplifies lignin mineralization in surface soils, but does not result in higher net SOC turnover due to fungal biomass stabilization. In contrast, we suggest that Mn abundance promotes smaller, but more persistent SOC stocks in subsoils by accelerating SOC transformation from particulate to microbial biomass pools.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesFunding for this study was provided by the US National Science Foundation (awards EF-1340250, EF-1340681, EF-1340504, and DBI- 1724433) . We acknowledge the National Science Foundation for sup- porting the construction and ongoing operation of NEON. NEON is a project solely sponsored by the NSF and managed under cooperative support agreement (EF-1029808) to Battelle. This material is based in part upon work supported by NSF through the NEON program. We would like to thank Rommel Zulueta and the NEON SI Team for their support and assistance in the field for this project. Radiocarbon analysis was supported by the Radiocarbon Collaborative which is supported by the USDA Forest Service, University of California Irvine, and Michigan Technological University. Assistance with laboratory analyses was pro- vided by Stephanie Duston and Dave Mitchem. The authors do not declare any financial or other conflicts of interest.en
dc.description.sponsorshipUS National Science Foundation [EF-1340250, EF-1340681, EF-1340504, DBI- 1724433]; National Science Foundation; NSF [EF-1029808]; USDA Forest Service, University of California Irvine; Michigan Technological Universityen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.geoderma.2022.116070en
dc.identifier.eissn1872-6259en
dc.identifier.issn0016-7061en
dc.identifier.urihttp://hdl.handle.net/10919/115191en
dc.identifier.volume425en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsPublic Domain (U.S.)en
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectManganeseen
dc.subjectSoil carbonen
dc.subjectLigninen
dc.subjectFungien
dc.titleLignin and fungal abundance modify manganese effects on soil organic carbon persistence at the continental scaleen
dc.title.serialGeodermaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2.0-S0016706122003779-main.pdf
Size:
3.24 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Scholarly Works, Forest Resources and Environmental Conservation