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Soil carbon storage informed by particulate and mineral-associated organic matter

Nature geoscience, 2019-12, Vol.12 (12), p.989-994 [Peer Reviewed Journal]

Copyright Nature Publishing Group Dec 2019 ;ISSN: 1752-0894 ;EISSN: 1752-0908 ;DOI: 10.1038/s41561-019-0484-6

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Title:
Soil carbon storage informed by particulate and mineral-associated organic matter
Author: Cotrufo, M. Francesca ; Ranalli, Maria Giovanna ; Haddix, Michelle L. ; Six, Johan ; Lugato, Emanuele
Subjects: Arbuscular mycorrhizas ; Carbon ; Carbon capture and storage ; Carbon sequestration ; Climate change ; Climate change mitigation ; Demand ; Distribution ; Ectomycorrhizas ; Environmental changes ; Forests ; Fractionation ; Grasslands ; Land management ; Land use planning ; Mitigation ; Nitrogen ; Organic carbon ; Organic matter ; Organic soils ; Particulate organic matter ; Pools ; Soil ; Soil organic matter ; Soils ; Stocks ; Topsoil
Is Part Of: Nature geoscience, 2019-12, Vol.12 (12), p.989-994
Description: Effective land-based solutions to climate change mitigation require actions that maximize soil carbon storage without generating surplus nitrogen. Land management for carbon sequestration is most often informed by bulk soil carbon inventories, without considering the form in which carbon is stored, its capacity, persistency and nitrogen demand. Here, we present coupling of European-wide databases with soil organic matter physical fractionation to determine continental-scale forest and grassland topsoil carbon and nitrogen stocks and their distribution between mineral-associated and particulate organic matter pools. Grasslands and arbuscular mycorrhizal forests store more soil carbon in mineral-associated organic carbon, which is more persistent but has a higher nitrogen demand and saturates. Ectomycorrhizal forests store more carbon in particulate organic matter, which is more vulnerable to disturbance but has a lower nitrogen demand and can potentially accumulate indefinitely. The share of carbon between mineral-associated and particulate organic matter and the ratio between carbon and nitrogen affect soil carbon stocks and mediate the effects of other variables on soil carbon stocks. Understanding the physical distribution of organic matter in pools of mineral-associated versus particulate organic matter can inform land management for nitrogen-efficient carbon sequestration, which should be driven by the inherent soil carbon capacity and nitrogen availability in ecosystems.
Publisher: London: Nature Publishing Group
Language: English
Identifier: ISSN: 1752-0894
EISSN: 1752-0908
DOI: 10.1038/s41561-019-0484-6
Source: ProQuest Central

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Soil carbon storage informed by particulate and mineral-associated organic matter

Copyright Nature Publishing Group Dec 2019 ;ISSN: 1752-0894 ;EISSN: 1752-0908 ;DOI: 10.1038/s41561-019-0484-6

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