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Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests
China experiences some of the highest rates of anthropogenic nitrogen deposition globally, with further increases projected. Understanding of soil feedbacks to the combined anthropogenic influences of climate change and nitrogen deposition in these systems is critical to improve predictive abilities...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431897/ https://www.ncbi.nlm.nih.gov/pubmed/28496153 http://dx.doi.org/10.1038/s41598-017-01941-8 |
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author | Eberwein, Jennifer Shen, Weijun Jenerette, G. Darrel |
author_facet | Eberwein, Jennifer Shen, Weijun Jenerette, G. Darrel |
author_sort | Eberwein, Jennifer |
collection | PubMed |
description | China experiences some of the highest rates of anthropogenic nitrogen deposition globally, with further increases projected. Understanding of soil feedbacks to the combined anthropogenic influences of climate change and nitrogen deposition in these systems is critical to improve predictive abilities for future climate scenarios. Here we used a Michaelis-Menten substrate-based kinetics framework to explore how soil CO(2) production (R(soil)) responds to changes in temperature and available soil nitrogen (N) by combining field experiments with laboratory manipulations from sites experiencing elevated rates of anthropogenic N deposition but varying in soil N availabiltiy. The temperature sensitivity of R(soil) was strongly influenced by labile C additions. Furthermore, estimation of the temperature response of the Michaelis-Menten parameters supports the use of substrate-based kinetics in modeling efforts. Results from both field and laboratory experiments demonstrated a general decrease in R(soil) with increasing soil available N that was variably dependent on carbon (C) availability. Both the field and the laboratory measurements demonstrated a consistent decrease in the Michaelis-Menten parameter kM with increasing soil available N, indicating an increase in the efficiency of soil C decomposition with increasing N. Furthermore, these results provide evidence of interactions between N deposition and temperature sensitivity, which could influence C storage under combined anthropogenic global change drivers. |
format | Online Article Text |
id | pubmed-5431897 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54318972017-05-16 Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests Eberwein, Jennifer Shen, Weijun Jenerette, G. Darrel Sci Rep Article China experiences some of the highest rates of anthropogenic nitrogen deposition globally, with further increases projected. Understanding of soil feedbacks to the combined anthropogenic influences of climate change and nitrogen deposition in these systems is critical to improve predictive abilities for future climate scenarios. Here we used a Michaelis-Menten substrate-based kinetics framework to explore how soil CO(2) production (R(soil)) responds to changes in temperature and available soil nitrogen (N) by combining field experiments with laboratory manipulations from sites experiencing elevated rates of anthropogenic N deposition but varying in soil N availabiltiy. The temperature sensitivity of R(soil) was strongly influenced by labile C additions. Furthermore, estimation of the temperature response of the Michaelis-Menten parameters supports the use of substrate-based kinetics in modeling efforts. Results from both field and laboratory experiments demonstrated a general decrease in R(soil) with increasing soil available N that was variably dependent on carbon (C) availability. Both the field and the laboratory measurements demonstrated a consistent decrease in the Michaelis-Menten parameter kM with increasing soil available N, indicating an increase in the efficiency of soil C decomposition with increasing N. Furthermore, these results provide evidence of interactions between N deposition and temperature sensitivity, which could influence C storage under combined anthropogenic global change drivers. Nature Publishing Group UK 2017-05-11 /pmc/articles/PMC5431897/ /pubmed/28496153 http://dx.doi.org/10.1038/s41598-017-01941-8 Text en © The Author(s) 2017 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 Eberwein, Jennifer Shen, Weijun Jenerette, G. Darrel Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title | Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title_full | Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title_fullStr | Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title_full_unstemmed | Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title_short | Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
title_sort | michaelis-menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431897/ https://www.ncbi.nlm.nih.gov/pubmed/28496153 http://dx.doi.org/10.1038/s41598-017-01941-8 |
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