Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests

Abstract 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...

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Autores principales:	Jennifer Eberwein, Weijun Shen, G. Darrel Jenerette
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e35c23e8debc4b4f8817798d04ba4fab
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spelling	oai:doaj.org-article:e35c23e8debc4b4f8817798d04ba4fab2021-12-02T12:30:35ZMichaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests10.1038/s41598-017-01941-82045-2322https://doaj.org/article/e35c23e8debc4b4f8817798d04ba4fab2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01941-8https://doaj.org/toc/2045-2322Abstract 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 CO2 production (Rsoil) 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 Rsoil 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 Rsoil 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.Jennifer EberweinWeijun ShenG. Darrel JeneretteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jennifer Eberwein Weijun Shen G. Darrel Jenerette Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests
description	Abstract 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 CO2 production (Rsoil) 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 Rsoil 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 Rsoil 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	article
author	Jennifer Eberwein Weijun Shen G. Darrel Jenerette
author_facet	Jennifer Eberwein Weijun Shen G. Darrel Jenerette
author_sort	Jennifer Eberwein
title	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_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_sort	michaelis-menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e35c23e8debc4b4f8817798d04ba4fab
work_keys_str_mv	AT jennifereberwein michaelismentenkineticsofsoilrespirationfeedbackstonitrogendepositionandclimatechangeinsubtropicalforests AT weijunshen michaelismentenkineticsofsoilrespirationfeedbackstonitrogendepositionandclimatechangeinsubtropicalforests AT gdarreljenerette michaelismentenkineticsofsoilrespirationfeedbackstonitrogendepositionandclimatechangeinsubtropicalforests
_version_	1718394368570687488

Michaelis-Menten kinetics of soil respiration feedbacks to nitrogen deposition and climate change in subtropical forests

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