Evidence map›Paper›PMID 36745807›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2023

Moisture-driven divergence in mineral-associated soil carbon persistence.

Katherine A Heckman, Angela R Possinger, Brian D Badgley, Maggie M Bowman, Adrian C Gallo, Jeff A Hatten, Lucas E Nave, Michael D SanClements, Christopher W Swanston, Tyler L Weiglein and 2 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Katherine A HeckmanUSDA Forest Service, Northern Research Station, Houghton, MI 49931.ORCID 0000-0003-2265-4542
Angela R PossingerDepartment of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061.
Brian D BadgleySchool of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061.
Maggie M BowmanEnvironmental Molecular Sciences Laboratory, Earth and Biological Sciences Division, Richland, WA 99354.
Adrian C GalloForest Engineering, Resources & Management, Oregon State University, Corvallis, OR 97330.
Jeff A HattenForest Engineering, Resources & Management, Oregon State University, Corvallis, OR 97330.
Lucas E NaveNorthern Institute of Applied Climate Science, Michigan Technological University, Houghton, MI 49931.ORCID 0000-0001-8258-8335
Michael D SanClementsNational Ecological Observatory Network, Battelle, Boulder, CO 80301.
Christopher W SwanstonOffice of Sustainability and Climate, United States Department of Agriculture Forest Service, Houghton, MI 49931.
Tyler L WeigleinDepartment of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061.ORCID 0000-0003-0656-7633
William R WiederInstitute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO 80303.ORCID 0000-0001-7116-1985
Brian D StrahmDepartment of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061.ORCID 0000-0002-4025-2304

Funding

National Science Foundation (NSF) ARCSS-2031238 DEB-1926413U.S. National Science Foundation Macrosystems, BIO Directorate, Division of Environmental Biology Program EF-1340681 EF-1340504 EF-1340516 EF-1340250 DBI-1724433
6 · The paper itself

Abstract

Mineral stabilization of soil organic matter is an important regulator of the global carbon (C) cycle. However, the vulnerability of mineral-stabilized organic matter (OM) to climate change is currently unknown. We examined soil profiles from 34 sites across the conterminous USA to investigate how the abundance and persistence of mineral-associated organic C varied with climate at the continental scale. Using a novel combination of radiocarbon and molecular composition measurements, we show that the relationship between the abundance and persistence of mineral-associated organic matter (MAOM) appears to be driven by moisture availability. In wetter climates where precipitation exceeds evapotranspiration, excess moisture leads to deeper and more prolonged periods of wetness, creating conditions which favor greater root abundance and also allow for greater diffusion and interaction of inputs with MAOM. In these humid soils, mineral-associated soil organic C concentration and persistence are strongly linked, whereas this relationship is absent in drier climates. In arid soils, root abundance is lower, and interaction of inputs with mineral surfaces is limited by shallower and briefer periods of moisture, resulting in a disconnect between concentration and persistence. Data suggest a tipping point in the cycling of mineral-associated C at a climate threshold where precipitation equals evaporation. As climate patterns shift, our findings emphasize that divergence in the mechanisms of OM persistence associated with historical climate legacies need to be considered in process-based models.

Indexed as

mineral stabilizationradiocarbonsoil carbonsoil carbon persistenceterrestrial carbon cycle

Identifiers

PMID36745807
PMCPMC9962923

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.