Climate Effects on Subsoil Carbon Loss Mediated by Soil Chemistry

Simple item page
dc.contributor.authorPossinger, Angela R.en
dc.contributor.authorWeiglein, Tyler L.en
dc.contributor.authorBowman, Maggie M.en
dc.contributor.authorGallo, Adrian C.en
dc.contributor.authorHatten, Jeff A.en
dc.contributor.authorHeckman, Katherine A.en
dc.contributor.authorMatosziuk, Lauren M.en
dc.contributor.authorNave, Lucas E.en
dc.contributor.authorSanClements, Michael D.en
dc.contributor.authorSwanston, Christopher W.en
dc.contributor.authorStrahm, Brian D.en
dc.date.accessioned2022-05-05T13:00:54Zen
dc.date.available2022-05-05T13:00:54Zen
dc.date.issued2021-12-07en
dc.description.abstractSubsoils store at least 50% of soil organic carbon (SOC) globally, but climate change may accelerate subsoil SOC (SOCsub) decomposition and amplify SOC-climate feedbacks. The climate sensitivity of SOCsub decomposition varies across systems, but we lack the mechanistic links needed to predict system-specific SOCsub vulnerability as a function of measurable properties at larger scales. Here, we show that soil chemical properties exert significant control over SOCsub decomposition under elevated temperature and moisture in subsoils collected across terrestrial National Ecological Observatory Network sites. Compared to a suite of soil and site-level variables, a divalent base cation-to-reactive metal gradient, linked to dominant mechanisms of SOCsub mineral protection, was the best predictor of the climate sensitivity of SOC decomposition. The response was "U"-shaped, showing higher sensitivity to temperature and moisture when either extractable base cations or reactive metals were highest. However, SOCsub in base cation-dominated subsoils was more sensitive to moisture than temperature, with the opposite relationship demonstrated in reactive metal-dominated subsoils. These observations highlight the importance of system-specific mechanisms of mineral stabilization in the prediction of SOCsub vulnerability to climate drivers. Our observations also form the basis for a spatially explicit, scalable, and mechanistically grounded tool for improved prediction of SOCsub response to climate change.en
dc.description.notesFunding for this study was provided by the US National Science Foundation (awards EF-1340250, EF-1340681, and DBI-1724433). NEON is sponsored by the NSF and operated under cooperative agreement by Battelle. This material is based in part upon work supported by the 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 provided by Stephanie Duston and Dave Mitchem.en
dc.description.sponsorshipUS National Science FoundationNational Science Foundation (NSF) [EF-1340250, EF-1340681, DBI-1724433]; NSFNational Science Foundation (NSF); NSF through the NEON program; NEON SI Team; USDA Forest Service, University of California Irvine; Michigan Technological Universityen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1021/acs.est.1c04909en
dc.identifier.eissn1520-5851en
dc.identifier.issn0013-936Xen
dc.identifier.issue23en
dc.identifier.urihttp://hdl.handle.net/10919/109811en
dc.identifier.volume55en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectsubsoil carbonen
dc.subjectorgano-mineralen
dc.subjectclimate sensitivityen
dc.subjectbase cationen
dc.subjectreactive metalen
dc.titleClimate Effects on Subsoil Carbon Loss Mediated by Soil Chemistryen
dc.title.serialEnvironmental Science & Technologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
acs.est.1c04909.pdf
Size:
1.86 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Scholarly Works, Forest Resources and Environmental Conservation