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Title: Microbial spatial footprint as a driver of soil carbon stabilization

Abstract

Increasing the potential of soil to store carbon (C) is an acknowledged and emphasized strategy for capturing atmospheric CO 2. Well-recognized approaches for soil C accretion include reducing soil disturbance, increasing plant biomass inputs, and enhancing plant diversity. Yet experimental evidence often fails to support anticipated C gains, suggesting that our integrated understanding of soil C accretion remains insufficient. Here we use a unique combination of X-ray micro-tomography and micro-scale enzyme mapping to demonstrate for the first time that plant-stimulated soil pore formation appears to be a major, hitherto unrecognized, determinant of whether new C inputs are stored or lost to the atmosphere. Unlike monocultures, diverse plant communities favor the development of 30–150 µm pores. Such pores are the micro-environments associated with higher enzyme activities, and greater abundance of such pores translates into a greater spatial footprint that microorganisms make on the soil and consequently soil C storage capacity.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [6];  [7]
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Plant, Soil and Microbial Sciences; Michigan State Univ., East Lansing, MI (United States). DOE Great Lakes Bioenergy Research Center; Univ. of Göttingen, Göttingen (Germany)
  2. Michigan State Univ., East Lansing, MI (United States). Dept. of Plant, Soil and Microbial Sciences; Michigan State Univ., East Lansing, MI (United States). DOE Great Lakes Bioenergy Research Cente
  3. Christian-Albrecht-Univ. of Kiel, Kiel (Germany). Dept. of Soil Science
  4. Swedish Univ. of Agricultural Sciences, Uppsala (Sweden)
  5. Michigan State Univ., East Lansing, MI (United States). Dept. of Plant, Soil and Microbial Sciences
  6. Michigan State Univ., East Lansing, MI (United States). Dept. of Plant, Soil and Microbial Sciences; Michigan State Univ., East Lansing, MI (United States). DOE Great Lakes Bioenergy Research Cente; RUDN Univ., Moscow (Russia)
  7. Department of Agricultural Soil Science, University of Göttingen, Göttingen, Germany; Institute of Physicochemical and Biological Problems in Soil Science, 142290, Pushchino, Russia; RUDN University, Moscow, Russia
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States). Great Lakes Bioenergy Research Center
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1547011
Grant/Contract Number:  
SC0018409
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 54 ENVIRONMENTAL SCIENCES

Citation Formats

Kravchenko, A. N., Guber, A. K., Razavi, B. S., Koestel, J., Quigley, M. Y., Robertson, G. P., and Kuzyakov, Y. Microbial spatial footprint as a driver of soil carbon stabilization. United States: N. p., 2019. Web. doi:10.1038/s41467-019-11057-4.
Kravchenko, A. N., Guber, A. K., Razavi, B. S., Koestel, J., Quigley, M. Y., Robertson, G. P., & Kuzyakov, Y. Microbial spatial footprint as a driver of soil carbon stabilization. United States. doi:10.1038/s41467-019-11057-4.
Kravchenko, A. N., Guber, A. K., Razavi, B. S., Koestel, J., Quigley, M. Y., Robertson, G. P., and Kuzyakov, Y. Tue . "Microbial spatial footprint as a driver of soil carbon stabilization". United States. doi:10.1038/s41467-019-11057-4. https://www.osti.gov/servlets/purl/1547011.
@article{osti_1547011,
title = {Microbial spatial footprint as a driver of soil carbon stabilization},
author = {Kravchenko, A. N. and Guber, A. K. and Razavi, B. S. and Koestel, J. and Quigley, M. Y. and Robertson, G. P. and Kuzyakov, Y.},
abstractNote = {Increasing the potential of soil to store carbon (C) is an acknowledged and emphasized strategy for capturing atmospheric CO2. Well-recognized approaches for soil C accretion include reducing soil disturbance, increasing plant biomass inputs, and enhancing plant diversity. Yet experimental evidence often fails to support anticipated C gains, suggesting that our integrated understanding of soil C accretion remains insufficient. Here we use a unique combination of X-ray micro-tomography and micro-scale enzyme mapping to demonstrate for the first time that plant-stimulated soil pore formation appears to be a major, hitherto unrecognized, determinant of whether new C inputs are stored or lost to the atmosphere. Unlike monocultures, diverse plant communities favor the development of 30–150 µm pores. Such pores are the micro-environments associated with higher enzyme activities, and greater abundance of such pores translates into a greater spatial footprint that microorganisms make on the soil and consequently soil C storage capacity.},
doi = {10.1038/s41467-019-11057-4},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {7}
}

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