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Cited by 150Soil Carbon and Nitrogen DynamicsSoil Geostatistics and MappingSoil erosion and sediment transport

Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage

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Hansen, Paige M., Even, Rebecca, King, Alison E., Lavallee, Jocelyn, Schipanski, Meagan, Cotrufo, M. Francesca·2024·Global Change Biology
DOI 10.1111/gcb.17080
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Abstract

Identifying controls on soil organic carbon (SOC) storage, and where SOC is most vulnerable to loss, are essential to managing soils for both climate change mitigation and global food security. However, we currently lack a comprehensive understanding of the global drivers of SOC storage, especially with regards to particulate (POC) and mineral‐associated organic carbon (MAOC). To better understand hierarchical controls on POC and MAOC, we applied path analyses to SOC fractions, climate (i.e., mean annual temperature [MAT] and mean annual precipitation minus potential evapotranspiration [MAP‐PET]), carbon (C) input (i.e., net primary production [NPP]), and soil property data synthesized from 72 published studies, along with data we generated from the National Ecological Observatory Network soil pits ( n = 901 total observations). To assess the utility of investigating POC and MAOC separately in understanding SOC storage controls, we then compared these results with another path analysis predicting bulk SOC storage. We found that POC storage is negatively related to MAT and soil pH, while MAOC storage is positively related to NPP and MAP‐PET, but negatively related to soil % sand. Our path analysis predicting bulk SOC revealed similar trends but explained less variation in C storage than our POC and MAOC analyses. Given that temperature and pH impose constraints on microbial decomposition, this indicates that POC is primarily controlled by SOC loss processes. In contrast, strong relationships with variables related to plant productivity constraints, moisture, and mineral surface availability for sorption indicate that MAOC is primarily controlled by climate‐driven variations in C inputs to the soil, as well as C stabilization mechanisms. Altogether, these results demonstrate that global POC and MAOC storage are controlled by separate environmental variables, further justifying the need to quantify and model these C fractions separately to assess and forecast the responses of SOC storage to global change.

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Cited by

Sorted by citations

Authors
Hansen, P. M., Even, R., King, A. E., Lavallee, J., Schipanski, M., & Cotrufo, M. F.
Affiliations
  • Colorado State University (US)
  • Environmental Defense Fund (US)
Corresponding author
Hansen, Paige M.
ORCID
Venue
Global Change Biology
Publisher
Wiley
Published
2023-12-25
Volume
30
Issue
1
Pages
e17080-e17080
ISSN
  • 1354-1013 (ISSN-L)
  • 1365-2486
DOI
10.1111/gcb.17080
OpenAlex
W4390234049
Cited by
150
References
6
Citations by year
2026: 60 · 2025: 61 · 2024: 29
FWCI
22.35
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
  • Global Change Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (2016003)
  • Division of Environmental Biology (2016003)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Environmental Science › Environmental Engineering › Soil Geostatistics and Mapping
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
Keywords
soil organic carbon, particulate organic carbon, mineral-associated organic carbon, mean annual temperature, soil pH, net primary productivity, soil moisture, soil texture, carbon stabilization, microbial decomposition, soil carbon fractions, soil pit
MeSH terms
Carbon, Minerals, Plants, Soil, Climate Change

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