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Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment

Atmospheric nitrous oxide (N(2)O) accounts for approximately 5% of the global greenhouse effect and destroys stratospheric ozone. Soils are the most important source of N(2)O, which is produced during nitrification and denitrification. To assess the impact of environmental variables and ecosystems o...

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Autores principales: Aronson, Emma L., Allison, Steven D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Research Foundation 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3408851/
https://www.ncbi.nlm.nih.gov/pubmed/22866053
http://dx.doi.org/10.3389/fmicb.2012.00272
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author Aronson, Emma L.
Allison, Steven D.
author_facet Aronson, Emma L.
Allison, Steven D.
author_sort Aronson, Emma L.
collection PubMed
description Atmospheric nitrous oxide (N(2)O) accounts for approximately 5% of the global greenhouse effect and destroys stratospheric ozone. Soils are the most important source of N(2)O, which is produced during nitrification and denitrification. To assess the impact of environmental variables and ecosystems on N(2)O flux, we performed a meta-analysis comparing N(2)O flux in N amended and matched control plots in non-agricultural soils. We found that N(2)O release increased with N amendment in the short term. Although there were few studies in shrubland, this ecosystem showed the greatest response. The N(2)O response to N amendment was greater in year-round studies and in studies with more measurements, but lower in longer studies. The N(2)O response was greater at higher latitudes and precipitation rates. We also observed an unexpected 55% decline in the N(2)O response to N amendment over the 23 years covered by the studies. This pattern may reflect a suppression of the N(2)O response from long-term N deposition accumulation, particularly in temperate regions. Although short term increases in reactive N entering natural systems may cause positive feedbacks to the release of N(2)O, this effect may diminish over time in locations with high rates of N deposition.
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spelling pubmed-34088512012-08-03 Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment Aronson, Emma L. Allison, Steven D. Front Microbiol Microbiology Atmospheric nitrous oxide (N(2)O) accounts for approximately 5% of the global greenhouse effect and destroys stratospheric ozone. Soils are the most important source of N(2)O, which is produced during nitrification and denitrification. To assess the impact of environmental variables and ecosystems on N(2)O flux, we performed a meta-analysis comparing N(2)O flux in N amended and matched control plots in non-agricultural soils. We found that N(2)O release increased with N amendment in the short term. Although there were few studies in shrubland, this ecosystem showed the greatest response. The N(2)O response to N amendment was greater in year-round studies and in studies with more measurements, but lower in longer studies. The N(2)O response was greater at higher latitudes and precipitation rates. We also observed an unexpected 55% decline in the N(2)O response to N amendment over the 23 years covered by the studies. This pattern may reflect a suppression of the N(2)O response from long-term N deposition accumulation, particularly in temperate regions. Although short term increases in reactive N entering natural systems may cause positive feedbacks to the release of N(2)O, this effect may diminish over time in locations with high rates of N deposition. Frontiers Research Foundation 2012-07-31 /pmc/articles/PMC3408851/ /pubmed/22866053 http://dx.doi.org/10.3389/fmicb.2012.00272 Text en Copyright © 2012 Aronson and Allison. http://www.frontiersin.org/licenseagreement This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
spellingShingle Microbiology
Aronson, Emma L.
Allison, Steven D.
Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title_full Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title_fullStr Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title_full_unstemmed Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title_short Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment
title_sort meta-analysis of environmental impacts on nitrous oxide release in response to n amendment
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3408851/
https://www.ncbi.nlm.nih.gov/pubmed/22866053
http://dx.doi.org/10.3389/fmicb.2012.00272
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