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Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition
Biological nitrogen fixation can fuel CO(2) sequestration by forests but can also stimulate soil emissions of nitrous oxide (N(2)O), a potent greenhouse gas. Here we use a theoretical model to suggest that symbiotic nitrogen-fixing trees could either mitigate (CO(2) sequestration outweighs soil N(2)...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6445091/ https://www.ncbi.nlm.nih.gov/pubmed/30940812 http://dx.doi.org/10.1038/s41467-019-09424-2 |
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author | Kou-Giesbrecht, Sian Menge, Duncan |
author_facet | Kou-Giesbrecht, Sian Menge, Duncan |
author_sort | Kou-Giesbrecht, Sian |
collection | PubMed |
description | Biological nitrogen fixation can fuel CO(2) sequestration by forests but can also stimulate soil emissions of nitrous oxide (N(2)O), a potent greenhouse gas. Here we use a theoretical model to suggest that symbiotic nitrogen-fixing trees could either mitigate (CO(2) sequestration outweighs soil N(2)O emissions) or exacerbate (vice versa) climate change relative to non-fixing trees, depending on their nitrogen fixation strategy (the degree to which they regulate nitrogen fixation to balance nitrogen supply and demand) and on nitrogen deposition. The model posits that nitrogen-fixing trees could exacerbate climate change globally relative to non-fixing trees by the radiative equivalent of 0.77 Pg C yr(−1) under nitrogen deposition rates projected for 2030. This value is highly uncertain, but its magnitude suggests that this subject requires further study and that improving the representation of biological nitrogen fixation in climate models could substantially decrease estimates of the extent to which forests will mitigate climate change. |
format | Online Article Text |
id | pubmed-6445091 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-64450912019-04-03 Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition Kou-Giesbrecht, Sian Menge, Duncan Nat Commun Article Biological nitrogen fixation can fuel CO(2) sequestration by forests but can also stimulate soil emissions of nitrous oxide (N(2)O), a potent greenhouse gas. Here we use a theoretical model to suggest that symbiotic nitrogen-fixing trees could either mitigate (CO(2) sequestration outweighs soil N(2)O emissions) or exacerbate (vice versa) climate change relative to non-fixing trees, depending on their nitrogen fixation strategy (the degree to which they regulate nitrogen fixation to balance nitrogen supply and demand) and on nitrogen deposition. The model posits that nitrogen-fixing trees could exacerbate climate change globally relative to non-fixing trees by the radiative equivalent of 0.77 Pg C yr(−1) under nitrogen deposition rates projected for 2030. This value is highly uncertain, but its magnitude suggests that this subject requires further study and that improving the representation of biological nitrogen fixation in climate models could substantially decrease estimates of the extent to which forests will mitigate climate change. Nature Publishing Group UK 2019-04-02 /pmc/articles/PMC6445091/ /pubmed/30940812 http://dx.doi.org/10.1038/s41467-019-09424-2 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Kou-Giesbrecht, Sian Menge, Duncan Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title | Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title_full | Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title_fullStr | Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title_full_unstemmed | Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title_short | Nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
title_sort | nitrogen-fixing trees could exacerbate climate change under elevated nitrogen deposition |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6445091/ https://www.ncbi.nlm.nih.gov/pubmed/30940812 http://dx.doi.org/10.1038/s41467-019-09424-2 |
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