Feedbacks between plant N demand and rhizosphere priming depend on type of mycorrhizal association
Abstract
Abstract Ecosystem carbon (C) balance is hypothesised to be sensitive to the mycorrhizal strategies that plants use to acquire nutrients. To test this idea, we coupled an optimality‐based plant nitrogen (N) acquisition model with a microbe‐focused soil organic matter ( SOM ) model. The model accurately predicted rhizosphere processes and C–N dynamics across a gradient of stands varying in their relative abundance of arbuscular mycorrhizal ( AM ) and ectomycorrhizal ( ECM ) trees. When mycorrhizal dominance was switched – ECM trees dominating plots previously occupied by AM trees, and vice versa – legacy effects were apparent, with consequences for both C and N stocks in soil. Under elevated productivity, ECM trees enhanced decomposition more than AM trees via microbial priming of unprotected SOM . Collectively, our results show that ecosystem responses to global change may hinge on the balance between rhizosphere priming and SOM protection, and highlight the importance of dynamically linking plants and microbes in terrestrial biosphere models.
- Authors:
-
- Program in Atmospheric and Oceanic Sciences Department of Geosciences Princeton University Princeton New Jersey USA
- Department of Biology West Virginia University Morgantown WV USA
- Princeton Environmental Institute Princeton University Princeton NJ USA
- NOAA Geophysical Fluid Dynamics Laboratory Princeton NJ USA
- Department of Ecology, Evolution and Environmental Biology Columbia University New York NY USA
- Department of Biology Indiana University Bloomington IN USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1400631
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Ecology Letters
- Additional Journal Information:
- Journal Name: Ecology Letters Journal Volume: 20 Journal Issue: 8; Journal ID: ISSN 1461-023X
- Publisher:
- Wiley-Blackwell
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Sulman, Benjamin N., Brzostek, Edward R., Medici, Chiara, Shevliakova, Elena, Menge, Duncan N. L., Phillips, Richard P., and Cleland, ed., Elsa. Feedbacks between plant N demand and rhizosphere priming depend on type of mycorrhizal association. United Kingdom: N. p., 2017.
Web. doi:10.1111/ele.12802.
Sulman, Benjamin N., Brzostek, Edward R., Medici, Chiara, Shevliakova, Elena, Menge, Duncan N. L., Phillips, Richard P., & Cleland, ed., Elsa. Feedbacks between plant N demand and rhizosphere priming depend on type of mycorrhizal association. United Kingdom. https://doi.org/10.1111/ele.12802
Sulman, Benjamin N., Brzostek, Edward R., Medici, Chiara, Shevliakova, Elena, Menge, Duncan N. L., Phillips, Richard P., and Cleland, ed., Elsa. Sun .
"Feedbacks between plant N demand and rhizosphere priming depend on type of mycorrhizal association". United Kingdom. https://doi.org/10.1111/ele.12802.
@article{osti_1400631,
title = {Feedbacks between plant N demand and rhizosphere priming depend on type of mycorrhizal association},
author = {Sulman, Benjamin N. and Brzostek, Edward R. and Medici, Chiara and Shevliakova, Elena and Menge, Duncan N. L. and Phillips, Richard P. and Cleland, ed., Elsa},
abstractNote = {Abstract Ecosystem carbon (C) balance is hypothesised to be sensitive to the mycorrhizal strategies that plants use to acquire nutrients. To test this idea, we coupled an optimality‐based plant nitrogen (N) acquisition model with a microbe‐focused soil organic matter ( SOM ) model. The model accurately predicted rhizosphere processes and C–N dynamics across a gradient of stands varying in their relative abundance of arbuscular mycorrhizal ( AM ) and ectomycorrhizal ( ECM ) trees. When mycorrhizal dominance was switched – ECM trees dominating plots previously occupied by AM trees, and vice versa – legacy effects were apparent, with consequences for both C and N stocks in soil. Under elevated productivity, ECM trees enhanced decomposition more than AM trees via microbial priming of unprotected SOM . Collectively, our results show that ecosystem responses to global change may hinge on the balance between rhizosphere priming and SOM protection, and highlight the importance of dynamically linking plants and microbes in terrestrial biosphere models.},
doi = {10.1111/ele.12802},
journal = {Ecology Letters},
number = 8,
volume = 20,
place = {United Kingdom},
year = {Sun Jul 02 00:00:00 EDT 2017},
month = {Sun Jul 02 00:00:00 EDT 2017}
}
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