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4 A Review of Recent Work on Soil Organic Matter

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Soil carbon sequestration is seen as an effective means to draw down atmospheric COii, simply at the same time warming may accelerate the loss of extant soil carbon, then an authentic estimation of soil carbon stocks and their vulnerability to climate change is required. Here we demonstrate how separating soil carbon into particulate and mineral-associated organic matter (POM and MAOM, respectively) aids in the understanding of its vulnerability to climate modify and identification of carbon sequestration strategies. By coupling European-broad databases with soil organic matter physical fractionation, nosotros assessed the current geographical distribution of mineral topsoil carbon in POM and MAOM by country cover using a machine-learning approach. Further, using observed climate relationships, we projected the vulnerability of carbon in POM and MAOM to future climate modify. Arable and coniferous wood soils contain the largest and most vulnerable carbon stocks when cumulated at the European scale. Although we show a lower carbon loss from mineral topsoils with climate change (2.5 ± 1.2 PgC by 2080) than those in some previous predictions, we urge the implementation of coniferous forest management practices that increase plant inputs to soils to start POM losses, and the adoption of all-time direction practices to avoid the loss of and to build up both POM and MAOM in arable soils.

Data availability

Data from the LUCAS database tin be accessed at http://esdac.jrc.ec.europa.european union/content/lucas-2009-topsoil-data. The SOM fractionation database and the resulting spatial layers are bachelor at ESDAC of the European Commission–Joint Research Centre (https://esdac.jrc.ec.europa.european union/content/soil-organic-matter-som-fractions).

Code availability

The most relevant R scripts regarding RF model training and validation are available at the ESDAC of the European Commission, https://esdac.jrc.ec.europa.european union/content/soil-organic-matter-som-fractions.

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Acknowledgements

This work was supported by the JRC (buy order no. D.B720517) and through the OECD Co-operative Research Programme: Biological Resources Management for Sustainable Agronomical Systems fellowship. We thank Thousand. Thousand. Ravalli for providing statistical consultation.

Writer information

Affiliations

  1. European Commission, Articulation Research Centre (JRC), Ispra, Italy

    Emanuele Lugato & Panos Panagos

  2. Department of Soil and Ingather Science, Colorado State University, Fort Collins, CO, USA

    Jocelyn Thousand. Lavallee, Michelle L. Haddix & Yard. Francesca Cotrufo

Contributions

E.L. and M.F.C. developed the research concepts and interpreted the data. M.F.C., E.L. and J.M.Fifty. wrote the commodity. E.L. conducted the data and statistical analyses. M.50.H. conducted all the SOM fractionation, and contributed to the writing of the methods. P.P. contributed to revising the manuscript.

Respective author

Correspondence to Emanuele Lugato.

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The authors declare no competing interests.

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Peer review information Nature Geoscience thank you Lauric Cécillon and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Primary Handling Editor: Xujia Jiang.

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Lugato, E., Lavallee, J.M., Haddix, M.L. et al. Different climate sensitivity of particulate and mineral-associated soil organic affair. Nat. Geosci. xiv, 295–300 (2021). https://doi.org/10.1038/s41561-021-00744-x

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