Articles | Volume 18, issue 10
https://doi.org/10.5194/bg-18-3147-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-3147-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 May 2021
Research article |
| 26 May 2021
| 26 May 2021
Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model
Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
Jocelyn M. Lavallee
Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
Department of Soil and Crop Sciences Colorado State University, Fort Collins, CO 80523, USA
Andy D. Robertson
Shell International Exploration and Production, Shell Technology Center Houston, 3333 Highway 6 South, Houston, TX 77082-3101, USA
Rebecca Even
Department of Soil and Crop Sciences Colorado State University, Fort Collins, CO 80523, USA
Stephen M. Ogle
Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO 80523, USA
Keith Paustian
Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
Department of Soil and Crop Sciences Colorado State University, Fort Collins, CO 80523, USA
M. Francesca Cotrufo
Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
Department of Soil and Crop Sciences Colorado State University, Fort Collins, CO 80523, USA
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EGUsphere, https://doi.org/10.5194/egusphere-2025-1711, https://doi.org/10.5194/egusphere-2025-1711, 2025
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Improved management practices such as rotational grazing, grazing exclusion, and legume enrichment can boost climate change mitigation and adaptation in grasslands. We studied the effects of these practices on soil organic carbon (SOC) stocks and fractions in semi-arid grasslands. Rotational grazing increased SOC, especially mineral-protected fraction, while exclusion reduced particulate organic carbon stocks. These outcomes were linked to changes in plant traits, soil microbes, and nutrients.
Rebecca J. Even, Megan B. Machmuller, Jocelyn M. Lavallee, Tamara J. Zelikova, and M. Francesca Cotrufo
SOIL, 11, 17–34, https://doi.org/10.5194/soil-11-17-2025, https://doi.org/10.5194/soil-11-17-2025, 2025
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We conducted a service soil laboratory comparison study and tested the individual effect of common sieving, grinding, drying, and quantification methods on total, inorganic, and organic soil carbon (C) measurements. We found that inter-lab variability is large and each soil processing step impacts C measurement accuracy and/or precision. Standardizing soil processing methods is needed to ensure C measurements are accurate and precise, especially for C credit allocation and model calibration.
Stefano Manzoni and M. Francesca Cotrufo
Biogeosciences, 21, 4077–4098, https://doi.org/10.5194/bg-21-4077-2024, https://doi.org/10.5194/bg-21-4077-2024, 2024
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Organic carbon and nitrogen are stabilized in soils via microbial assimilation and stabilization of necromass (in vivo pathway) or via adsorption of the products of extracellular decomposition (ex vivo pathway). Here we use a diagnostic model to quantify which stabilization pathway is prevalent using data on residue-derived carbon and nitrogen incorporation in mineral-associated organic matter. We find that the in vivo pathway is dominant in fine-textured soils with low organic matter content.
Sam J. Leuthold, Jocelyn M. Lavallee, Bruno Basso, William F. Brinton, and M. Francesca Cotrufo
SOIL, 10, 307–319, https://doi.org/10.5194/soil-10-307-2024, https://doi.org/10.5194/soil-10-307-2024, 2024
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We examined physical soil organic matter fractions to understand their relationship to temporal variability in crop yield at field scale. We found that interactions between crop productivity, topography, and climate led to variability in soil organic matter stocks among different yield stability zones. Our results imply that linkages between soil organic matter and yield stability may be scale-dependent and that particulate organic matter may be an indicator of unstable areas within croplands.
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Short summary
Soil organic matter (SOM) is essential for the health of soils, and the accumulation of SOM helps removal of CO2 from the atmosphere. Here we present the result of the continued development of a mathematical model that simulates SOM and its measurable fractions. In this study, we simulated several grassland sites in the US, and the model generally captured the carbon and nitrogen amounts in SOM and their distribution between the measurable fractions throughout the entire soil profile.
Soil organic matter (SOM) is essential for the health of soils, and the accumulation of SOM...
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