Properties of soil pore space regulate pathways of plant residue decomposition and community structure of associated bacteria
Abstract
Physical protection of soil carbon (C) is one of the important components of C storage. However, its exact mechanisms are still not sufficiently lucid. The goal of this study was to explore the influence of soil structure, that is, soil pore spatial arrangements, with and without presence of plant residue on (i) decomposition of added plant residue, (ii) CO₂ emission from soil, and (iii) structure of soil bacterial communities. The study consisted of several soil incubation experiments with samples of contrasting pore characteristics with/without plant residue, accompanied by X-ray micro-tomographic analyses of soil pores and by microbial community analysis of amplified 16S–18S rRNA genes via pyrosequencing. We observed that in the samples with substantial presence of air-filled well-connected large (>30 µm) pores, 75–80% of the added plant residue was decomposed, cumulative CO₂ emission constituted 1,200 µm C g⁻¹ soil, and movement of C from decomposing plant residue into adjacent soil was insignificant. In the samples with greater abundance of water-filled small pores, 60% of the added plant residue was decomposed, cumulative CO₂ emission constituted 2,000 µm C g⁻¹ soil, and the movement of residue C into adjacent soil was substantial. In the absence of plant residue the influence of poremore »
- Authors:
-
- Institute for Advanced Sustainability Studies, Potsdam (Germany). IASS-Global Soil Forum.
- Michigan State Univ., East Lansing, MI (United States). Dept. of Plant, Soil and Microbial Sciences.
- Michigan State Univ., East Lansing, MI (United States). Dept. of Microbiology and Molecular Genetics.
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Org.:
- FOREIGN
- OSTI Identifier:
- 1188810
- Resource Type:
- Accepted Manuscript
- Journal Name:
- PLoS ONE
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 4; Journal ID: ISSN 1932-6203
- Publisher:
- Public Library of Science
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 54 ENVIRONMENTAL SCIENCES; leaves; carbon dioxide; maize; plant communities; porosity; community structure; fluid dynamics; Shannon index
Citation Formats
Negassa, Wakene C., Guber, Andrey K., Kravchenko, Alexandra N., Marsh, Terence L., Hildebrandt, Britton, and Rivers, Mark L. Properties of soil pore space regulate pathways of plant residue decomposition and community structure of associated bacteria. United States: N. p., 2015.
Web. doi:10.1371/journal.pone.0123999.
Negassa, Wakene C., Guber, Andrey K., Kravchenko, Alexandra N., Marsh, Terence L., Hildebrandt, Britton, & Rivers, Mark L. Properties of soil pore space regulate pathways of plant residue decomposition and community structure of associated bacteria. United States. https://doi.org/10.1371/journal.pone.0123999
Negassa, Wakene C., Guber, Andrey K., Kravchenko, Alexandra N., Marsh, Terence L., Hildebrandt, Britton, and Rivers, Mark L. Wed .
"Properties of soil pore space regulate pathways of plant residue decomposition and community structure of associated bacteria". United States. https://doi.org/10.1371/journal.pone.0123999. https://www.osti.gov/servlets/purl/1188810.
@article{osti_1188810,
title = {Properties of soil pore space regulate pathways of plant residue decomposition and community structure of associated bacteria},
author = {Negassa, Wakene C. and Guber, Andrey K. and Kravchenko, Alexandra N. and Marsh, Terence L. and Hildebrandt, Britton and Rivers, Mark L.},
abstractNote = {Physical protection of soil carbon (C) is one of the important components of C storage. However, its exact mechanisms are still not sufficiently lucid. The goal of this study was to explore the influence of soil structure, that is, soil pore spatial arrangements, with and without presence of plant residue on (i) decomposition of added plant residue, (ii) CO₂ emission from soil, and (iii) structure of soil bacterial communities. The study consisted of several soil incubation experiments with samples of contrasting pore characteristics with/without plant residue, accompanied by X-ray micro-tomographic analyses of soil pores and by microbial community analysis of amplified 16S–18S rRNA genes via pyrosequencing. We observed that in the samples with substantial presence of air-filled well-connected large (>30 µm) pores, 75–80% of the added plant residue was decomposed, cumulative CO₂ emission constituted 1,200 µm C g⁻¹ soil, and movement of C from decomposing plant residue into adjacent soil was insignificant. In the samples with greater abundance of water-filled small pores, 60% of the added plant residue was decomposed, cumulative CO₂ emission constituted 2,000 µm C g⁻¹ soil, and the movement of residue C into adjacent soil was substantial. In the absence of plant residue the influence of pore characteristics on CO₂ emission, that is on decomposition of the native soil organic C, was negligible. The microbial communities on the plant residue in the samples with large pores had more microbial groups known to be cellulose decomposers, that is, Bacteroidetes, Proteobacteria, Actinobacteria, and Firmicutes, while a number of oligotrophic Acidobacteria groups were more abundant on the plant residue from the samples with small pores. This study provides the first experimental evidence that characteristics of soil pores and their air/water flow status determine the phylogenetic composition of the local microbial community and directions and magnitudes of soil C decomposition processes.},
doi = {10.1371/journal.pone.0123999},
journal = {PLoS ONE},
number = 4,
volume = 10,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 2015},
month = {Wed Jul 01 00:00:00 EDT 2015}
}
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Contrast-enhanced repacked soil cores as a proxy for soil organic matter spatial arrangement
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What do we know about soil carbon destabilization?
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Bacterial community composition in a polyculture system of Rhopilema esculenta , Penaeus monodon and Ruditapes philippinarum
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X-ray computed tomography to predict soil N 2 O production via bacterial denitrification and N 2 O emission in contrasting bioenergy cropping systems
journal, September 2018
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Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain
journal, August 2018
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- Frontiers in Microbiology, Vol. 9
Three-dimensional soil organic matter distribution, accessibility and microbial respiration in macroaggregates using osmium staining and synchrotron X-ray computed tomography
journal, January 2016
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Nitrogen Limitations on Microbial Degradation of Plant Substrates Are Controlled by Soil Structure and Moisture Content
journal, July 2018
- Maenhout, Peter; Van den Bulcke, Jan; Van Hoorebeke, Luc
- Frontiers in Microbiology, Vol. 9
Shifts in pore connectivity from precipitation versus groundwater rewetting increases soil carbon loss after drought
journal, November 2017
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- Nature Communications, Vol. 8, Issue 1
Protection of soil carbon within macro-aggregates depends on intra-aggregate pore characteristics
journal, November 2015
- Kravchenko, Alexandra N.; Negassa, Wakene C.; Guber, Andrey K.
- Scientific Reports, Vol. 5, Issue 1
Changes in the Bacterial Community Structure of Remediated Anthracene-Contaminated Soils
journal, October 2016
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Nitrogen Limitations on Microbial Degradation of Plant Substrates Are Controlled by Soil Structure and Moisture Content
journal, July 2018
- Maenhout, Peter; Van den Bulcke, Jan; Van Hoorebeke, Luc
- Frontiers in Microbiology, Vol. 9
Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain
journal, August 2018
- Baveye, Philippe C.; Otten, Wilfred; Kravchenko, Alexandra
- Frontiers in Microbiology, Vol. 9
Distribution and Driving Factors of Forest Swamp Conversions in a Cold Temperate Region
journal, September 2018
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