U.S. Department of EnergyOffice of Scientific and Technical Information
Indexing Permafrost Soil Organic Matter Degradation Using High-Resolution Mass Spectrometry
Abstract
Microbial degradation of soil organic matter (SOM) is a key process for terrestrial carbon cycling, although the molecular details of these transformations remain unclear. This study reports the application of ultrahigh resolution mass spectrometry to profile the molecular composition of SOM and its degradation during a simulated warming experiment. A soil sample, collected near Barrow, Alaska, USA, was subjected to a 40-day incubation under anoxic conditions and analyzed before and after the incubation to determine changes of SOM composition. A CHO index based on molecular C, H, and O data was utilized to codify SOM components according to their observed degradation potentials. Compounds with a CHO index score between 1 and 0 in a water-soluble fraction (WSF) demonstrated high degradation potential, with a highest shift of CHO index occurred in the N-containing group of compounds, while similar stoichiometries in a base-soluble fraction (BSF) did not. Additionally, compared with the classical H:C vs O:C van Krevelen diagram, CHO index allowed for direct visualization of the distribution of heteroatoms such as N in the identified SOM compounds. We demonstrate that CHO index is useful not only in characterizing arctic SOM at the molecular level but also enabling quantitative description of SOM degradation,more »
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Kent State Univ. (Ohio)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Tennessee State Univ., Nashville, TN (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1203369
- Alternate Identifier(s):
- OSTI ID: 1212345
- Grant/Contract Number:
- AC05-76RL01830; AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- PLoS ONE
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 6; Journal ID: ISSN 1932-6203
- Publisher:
- Public Library of Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; soil organic matter; Arctic soil; microbial degradation; climate change; warming; ion cyclotron resonance mass spectrometry
Citation Formats
Mann, Benjamin F., Chen, Hongmei, Herndon, Elizabeth M., Chu, Rosalie K., Tolic, Nikola, Portier, Evan F., Roy Chowdhury, Taniya, Robinson, Errol W., Callister, Stephen J., Wullschleger, Stan D., Graham, David E., Liang, Liyuan, Gu, Baohua, and Hui, Dafeng. Indexing Permafrost Soil Organic Matter Degradation Using High-Resolution Mass Spectrometry. United States: N. p., 2015.
Web. doi:10.1371/journal.pone.0130557.
Mann, Benjamin F., Chen, Hongmei, Herndon, Elizabeth M., Chu, Rosalie K., Tolic, Nikola, Portier, Evan F., Roy Chowdhury, Taniya, Robinson, Errol W., Callister, Stephen J., Wullschleger, Stan D., Graham, David E., Liang, Liyuan, Gu, Baohua, & Hui, Dafeng. Indexing Permafrost Soil Organic Matter Degradation Using High-Resolution Mass Spectrometry. United States. https://doi.org/10.1371/journal.pone.0130557
Mann, Benjamin F., Chen, Hongmei, Herndon, Elizabeth M., Chu, Rosalie K., Tolic, Nikola, Portier, Evan F., Roy Chowdhury, Taniya, Robinson, Errol W., Callister, Stephen J., Wullschleger, Stan D., Graham, David E., Liang, Liyuan, Gu, Baohua, and Hui, Dafeng. 2015.
"Indexing Permafrost Soil Organic Matter Degradation Using High-Resolution Mass Spectrometry". United States. https://doi.org/10.1371/journal.pone.0130557. https://www.osti.gov/servlets/purl/1203369.
@article{osti_1203369,
title = {Indexing Permafrost Soil Organic Matter Degradation Using High-Resolution Mass Spectrometry},
author = {Mann, Benjamin F. and Chen, Hongmei and Herndon, Elizabeth M. and Chu, Rosalie K. and Tolic, Nikola and Portier, Evan F. and Roy Chowdhury, Taniya and Robinson, Errol W. and Callister, Stephen J. and Wullschleger, Stan D. and Graham, David E. and Liang, Liyuan and Gu, Baohua and Hui, Dafeng},
abstractNote = {Microbial degradation of soil organic matter (SOM) is a key process for terrestrial carbon cycling, although the molecular details of these transformations remain unclear. This study reports the application of ultrahigh resolution mass spectrometry to profile the molecular composition of SOM and its degradation during a simulated warming experiment. A soil sample, collected near Barrow, Alaska, USA, was subjected to a 40-day incubation under anoxic conditions and analyzed before and after the incubation to determine changes of SOM composition. A CHO index based on molecular C, H, and O data was utilized to codify SOM components according to their observed degradation potentials. Compounds with a CHO index score between 1 and 0 in a water-soluble fraction (WSF) demonstrated high degradation potential, with a highest shift of CHO index occurred in the N-containing group of compounds, while similar stoichiometries in a base-soluble fraction (BSF) did not. Additionally, compared with the classical H:C vs O:C van Krevelen diagram, CHO index allowed for direct visualization of the distribution of heteroatoms such as N in the identified SOM compounds. We demonstrate that CHO index is useful not only in characterizing arctic SOM at the molecular level but also enabling quantitative description of SOM degradation, thereby facilitating incorporation of the high resolution MS datasets to future mechanistic models of SOM degradation and prediction of greenhouse gas emissions.},
doi = {10.1371/journal.pone.0130557},
url = {https://www.osti.gov/biblio/1203369},
journal = {PLoS ONE},
issn = {1932-6203},
number = 6,
volume = 10,
place = {United States},
year = {Fri Jun 12 00:00:00 EDT 2015},
month = {Fri Jun 12 00:00:00 EDT 2015}
}
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