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Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter
Decomposition of soil organic matter (SOM) plays an important role in the global carbon cycle because the CO(2) emitted from soil respiration is an important source of atmospheric CO(2). Carbon isotopic fractionation occurs during SOM decomposition, which leads to (12)C to enrich in the released CO(...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650608/ https://www.ncbi.nlm.nih.gov/pubmed/26056012 http://dx.doi.org/10.1038/srep11043 |
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author | Wang, Guoan Jia, Yufu Li, Wei |
author_facet | Wang, Guoan Jia, Yufu Li, Wei |
author_sort | Wang, Guoan |
collection | PubMed |
description | Decomposition of soil organic matter (SOM) plays an important role in the global carbon cycle because the CO(2) emitted from soil respiration is an important source of atmospheric CO(2). Carbon isotopic fractionation occurs during SOM decomposition, which leads to (12)C to enrich in the released CO(2) while (13)C to enrich in the residual SOM. Understanding the isotope fractionation has been demonstrated to be helpful for studying the global carbon cycle. Soil and litter samples were collected from soil profiles at 27 different sites located along a vertical transect from 1200 to 4500 m above sea level (a.s.l.) in the south-eastern side of the Tibetan Plateau. Their carbon isotope ratios, C and N concentrations were measured. In addition, fiber and lignin in litter samples were also analyzed. Carbon isotope fractionation factor (α) during SOM decomposition was estimated indirectly as the slope of the relationship between carbon isotope ratios of SOM and soil C concentrations. This study shows that litter quality and soil water play a significant role in isotope fractionation during SOM decomposition, and the carbon isotope fractionation factor, α, increases with litter quality and soil water content. However, we found that temperature had no significant impact on the α variance. |
format | Online Article Text |
id | pubmed-4650608 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46506082015-11-24 Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter Wang, Guoan Jia, Yufu Li, Wei Sci Rep Article Decomposition of soil organic matter (SOM) plays an important role in the global carbon cycle because the CO(2) emitted from soil respiration is an important source of atmospheric CO(2). Carbon isotopic fractionation occurs during SOM decomposition, which leads to (12)C to enrich in the released CO(2) while (13)C to enrich in the residual SOM. Understanding the isotope fractionation has been demonstrated to be helpful for studying the global carbon cycle. Soil and litter samples were collected from soil profiles at 27 different sites located along a vertical transect from 1200 to 4500 m above sea level (a.s.l.) in the south-eastern side of the Tibetan Plateau. Their carbon isotope ratios, C and N concentrations were measured. In addition, fiber and lignin in litter samples were also analyzed. Carbon isotope fractionation factor (α) during SOM decomposition was estimated indirectly as the slope of the relationship between carbon isotope ratios of SOM and soil C concentrations. This study shows that litter quality and soil water play a significant role in isotope fractionation during SOM decomposition, and the carbon isotope fractionation factor, α, increases with litter quality and soil water content. However, we found that temperature had no significant impact on the α variance. Nature Publishing Group 2015-06-09 /pmc/articles/PMC4650608/ /pubmed/26056012 http://dx.doi.org/10.1038/srep11043 Text en Copyright © 2015, Macmillan Publishers Limited 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 Wang, Guoan Jia, Yufu Li, Wei Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title | Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title_full | Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title_fullStr | Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title_full_unstemmed | Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title_short | Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
title_sort | effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650608/ https://www.ncbi.nlm.nih.gov/pubmed/26056012 http://dx.doi.org/10.1038/srep11043 |
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