From pools to flow: The PROMISE framework for new insights on soil carbon cycling in a changing world

dc.contributor.author Waring, Bonnie
dc.contributor.author Hall, Steven
dc.contributor.author Sulman, Benjamin
dc.contributor.author Reed, Sasha
dc.contributor.author Smith, A. Peyton
dc.contributor.author Averill, Colin
dc.contributor.author Creamer, Courtney
dc.contributor.author Cusack, Daniela
dc.contributor.author Hall, Steven
dc.contributor.author Jastrow, Julie
dc.contributor.author Jilling, Andrea
dc.contributor.author Kemner, Kenneth
dc.contributor.author Kleber, Markus
dc.contributor.author Liu, Xiao-Jun Allen
dc.contributor.author Pett-Ridge, Jennifer
dc.contributor.author Schulz, Marjorie
dc.contributor.department Ecology, Evolution and Organismal Biology
dc.date 2020-10-21T19:15:39.000
dc.date.accessioned 2021-02-25T18:42:29Z
dc.date.available 2021-02-25T18:42:29Z
dc.date.issued 2020-01-01
dc.description.abstract <p>Soils represent the largest terrestrial reservoir of organic carbon, and the balance between soil organic carbon (SOC) formation and loss will drive powerful carbon‐climate feedbacks over the coming century. To date, efforts to predict SOC dynamics have rested on pool‐based models, which assume classes of SOC with internally homogenous physicochemical properties. However, emerging evidence suggests that soil carbon turnover is not dominantly controlled by the chemistry of carbon inputs, but rather by restrictions on microbial access to organic matter in the spatially heterogeneous soil environment. The dynamic processes that control the physicochemical protection of carbon translate poorly to pool‐based SOC models; as a result, we are challenged to mechanistically predict how environmental change will impact movement of carbon between soils and the atmosphere. Here, we propose a novel conceptual framework to explore controls on belowground carbon cycling: Probabilistic Representation of Organic Matter Interactions within the Soil Environment (PROMISE). In contrast to traditional model frameworks, PROMISE does not attempt to define carbon pools united by common thermodynamic or functional attributes. Rather, the PROMISE concept considers how SOC cycling rates are governed by the stochastic processes that influence the proximity between microbial decomposers and organic matter, with emphasis on their physical location in the soil matrix. We illustrate the applications of this framework with a new biogeochemical simulation model that traces the fate of individual carbon atoms as they interact with their environment, undergoing biochemical transformations and moving through the soil pore space. We also discuss how the PROMISE framework reshapes dialogue around issues related to SOC management in a changing world. We intend the PROMISE framework to spur the development of new hypotheses, analytical tools, and model structures across disciplines that will illuminate mechanistic controls on the flow of carbon between plant, soil, and atmospheric pools.</p>
dc.description.comments <p>This article is published as Waring, Bonnie G., Benjamin N. Sulman, Sasha Reed, A. Peyton Smith, Colin Averill, Courtney A. Creamer, Daniela F. Cusack et al. "From pools to flow: The PROMISE framework for new insights on soil carbon cycling in a changing world." <em>Global Change Biology </em>(2020). doi: <a href="https://doi.org/10.1111/gcb.15365">10.1111/gcb.15365</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/eeob_ag_pubs/438/
dc.identifier.articleid 1444
dc.identifier.contextkey 19895904
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/438
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/94192
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/438/2020_Hall_FromPools.pdf|||Sat Jan 15 00:16:40 UTC 2022
dc.source.uri 10.1111/gcb.15365
dc.subject.disciplines Biogeochemistry
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.disciplines Environmental Microbiology and Microbial Ecology
dc.subject.disciplines Soil Science
dc.subject.keywords biogeochemical model
dc.subject.keywords organic matter
dc.subject.keywords organo-mineral interactions
dc.subject.keywords pore structure
dc.subject.keywords soil carbon
dc.subject.keywords soil microbes
dc.title From pools to flow: The PROMISE framework for new insights on soil carbon cycling in a changing world
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 3f4318fa-b172-4017-b69d-49d5e3607c4f
relation.isOrgUnitOfPublication 6fa4d3a0-d4c9-4940-945f-9e5923aed691
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