Cargando…
Clay illuviation provides a long-term sink for C sequestration in subsoils
Soil plays a key role in the global carbon (C) cycle. Most current assessments of SOC stocks and the guidelines given by Intergovernmental Panel on Climate Change (IPCC) focus on the top 30 cm of soil. Our research shows that, when considering only total quantities, most of the SOC stocks are found...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5382536/ https://www.ncbi.nlm.nih.gov/pubmed/28382933 http://dx.doi.org/10.1038/srep45635 |
_version_ | 1782520120627691520 |
---|---|
author | Torres-Sallan, Gemma Schulte, Rogier P. O. Lanigan, Gary J. Byrne, Kenneth A. Reidy, Brian Simó, Iolanda Six, Johan Creamer, Rachel E. |
author_facet | Torres-Sallan, Gemma Schulte, Rogier P. O. Lanigan, Gary J. Byrne, Kenneth A. Reidy, Brian Simó, Iolanda Six, Johan Creamer, Rachel E. |
author_sort | Torres-Sallan, Gemma |
collection | PubMed |
description | Soil plays a key role in the global carbon (C) cycle. Most current assessments of SOC stocks and the guidelines given by Intergovernmental Panel on Climate Change (IPCC) focus on the top 30 cm of soil. Our research shows that, when considering only total quantities, most of the SOC stocks are found in this top layer. However, not all forms of SOC are equally valuable as long-term stable stores of carbon: the majority of SOC is available for mineralisation and can potentially be re-emitted to the atmosphere. SOC associated with micro-aggregates and silt plus clay fractions is more stable and therefore represents a long-term carbon store. Our research shows that most of this stable carbon is located at depths below 30 cm (42% of subsoil SOC is located in microaggregates and silt and clay, compared to 16% in the topsoil), specifically in soils that are subject to clay illuviation. This has implications for land management decisions in temperate grassland regions, defining the trade-offs between primary productivity and C emissions in clay-illuviated soils, as a result of drainage. Therefore, climate smart land management should consider the balance between SOC stabilisation in topsoils for productivity versus sequestration in subsoils for climate mitigation. |
format | Online Article Text |
id | pubmed-5382536 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-53825362017-04-10 Clay illuviation provides a long-term sink for C sequestration in subsoils Torres-Sallan, Gemma Schulte, Rogier P. O. Lanigan, Gary J. Byrne, Kenneth A. Reidy, Brian Simó, Iolanda Six, Johan Creamer, Rachel E. Sci Rep Article Soil plays a key role in the global carbon (C) cycle. Most current assessments of SOC stocks and the guidelines given by Intergovernmental Panel on Climate Change (IPCC) focus on the top 30 cm of soil. Our research shows that, when considering only total quantities, most of the SOC stocks are found in this top layer. However, not all forms of SOC are equally valuable as long-term stable stores of carbon: the majority of SOC is available for mineralisation and can potentially be re-emitted to the atmosphere. SOC associated with micro-aggregates and silt plus clay fractions is more stable and therefore represents a long-term carbon store. Our research shows that most of this stable carbon is located at depths below 30 cm (42% of subsoil SOC is located in microaggregates and silt and clay, compared to 16% in the topsoil), specifically in soils that are subject to clay illuviation. This has implications for land management decisions in temperate grassland regions, defining the trade-offs between primary productivity and C emissions in clay-illuviated soils, as a result of drainage. Therefore, climate smart land management should consider the balance between SOC stabilisation in topsoils for productivity versus sequestration in subsoils for climate mitigation. Nature Publishing Group 2017-04-06 /pmc/articles/PMC5382536/ /pubmed/28382933 http://dx.doi.org/10.1038/srep45635 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Torres-Sallan, Gemma Schulte, Rogier P. O. Lanigan, Gary J. Byrne, Kenneth A. Reidy, Brian Simó, Iolanda Six, Johan Creamer, Rachel E. Clay illuviation provides a long-term sink for C sequestration in subsoils |
title | Clay illuviation provides a long-term sink for C sequestration in subsoils |
title_full | Clay illuviation provides a long-term sink for C sequestration in subsoils |
title_fullStr | Clay illuviation provides a long-term sink for C sequestration in subsoils |
title_full_unstemmed | Clay illuviation provides a long-term sink for C sequestration in subsoils |
title_short | Clay illuviation provides a long-term sink for C sequestration in subsoils |
title_sort | clay illuviation provides a long-term sink for c sequestration in subsoils |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5382536/ https://www.ncbi.nlm.nih.gov/pubmed/28382933 http://dx.doi.org/10.1038/srep45635 |
work_keys_str_mv | AT torressallangemma clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT schulterogierpo clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT lanigangaryj clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT byrnekennetha clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT reidybrian clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT simoiolanda clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT sixjohan clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils AT creamerrachele clayilluviationprovidesalongtermsinkforcsequestrationinsubsoils |