Univ. of Massachusetts, Amherst, MA (United States). School of Earth and Sustainability and Stockbridge School of Agriculture; Stanford Univ., CA (United States). Earth System Science Department
Oregon State Univ., Corvallis, OR (United States). Department of Crop and Soil Science
Oregon State Univ., Corvallis, OR (United States). Department of Crop and Soil Science; Institut für Bodenlandschaftsforschung, Leibnitz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V., Müncheberg (Germany)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth and Environmental Sciences Area
Stanford Univ., CA (United States). Earth System Science Department
Soils represent the largest carbon reservoir within terrestrial ecosystems. The mechanisms controlling the amount of carbon stored and its feedback to the climate system, however, remain poorly resolved. Global carbon models assume that carbon cycling in upland soils is entirely driven by aerobic respiration; the impact of anaerobic microsites prevalent even within well-drained soils is missed within this conception. Here, we show that anaerobic microsites are important regulators of soil carbon persistence, shifting microbial metabolism to less efficient anaerobic respiration, and selectively protecting otherwise bioavailable, reduced organic compounds such as lipids and waxes from decomposition. Further, shifting from anaerobic to aerobic conditions leads to a 10-fold increase in volume-specific mineralization rate, illustrating the sensitivity of anaerobically protected carbon to disturbance. The vulnerability of anaerobically protected carbon to future climate or land use change thus constitutes a yet unrecognized soil carbon-climate feedback that should be incorporated into terrestrial ecosystem models.
Keiluweit, Marco, et al. "Anaerobic microsites have an unaccounted role in soil carbon stabilization." Nature Communications, vol. 8, no. 1, Nov. 2017. https://doi.org/10.1038/s41467-017-01406-6
Keiluweit, Marco, Wanzek, Tom, Kleber, Markus, Nico, Peter, & Fendorf, Scott (2017). Anaerobic microsites have an unaccounted role in soil carbon stabilization. Nature Communications, 8(1). https://doi.org/10.1038/s41467-017-01406-6
Keiluweit, Marco, Wanzek, Tom, Kleber, Markus, et al., "Anaerobic microsites have an unaccounted role in soil carbon stabilization," Nature Communications 8, no. 1 (2017), https://doi.org/10.1038/s41467-017-01406-6
@article{osti_1476578,
author = {Keiluweit, Marco and Wanzek, Tom and Kleber, Markus and Nico, Peter and Fendorf, Scott},
title = {Anaerobic microsites have an unaccounted role in soil carbon stabilization},
annote = {Soils represent the largest carbon reservoir within terrestrial ecosystems. The mechanisms controlling the amount of carbon stored and its feedback to the climate system, however, remain poorly resolved. Global carbon models assume that carbon cycling in upland soils is entirely driven by aerobic respiration; the impact of anaerobic microsites prevalent even within well-drained soils is missed within this conception. Here, we show that anaerobic microsites are important regulators of soil carbon persistence, shifting microbial metabolism to less efficient anaerobic respiration, and selectively protecting otherwise bioavailable, reduced organic compounds such as lipids and waxes from decomposition. Further, shifting from anaerobic to aerobic conditions leads to a 10-fold increase in volume-specific mineralization rate, illustrating the sensitivity of anaerobically protected carbon to disturbance. The vulnerability of anaerobically protected carbon to future climate or land use change thus constitutes a yet unrecognized soil carbon-climate feedback that should be incorporated into terrestrial ecosystem models.},
doi = {10.1038/s41467-017-01406-6},
url = {https://www.osti.gov/biblio/1476578},
journal = {Nature Communications},
issn = {ISSN 2041-1723},
number = {1},
volume = {8},
place = {United States},
publisher = {Nature Publishing Group},
year = {2017},
month = {11}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 582, Issue 1https://doi.org/10.1016/j.nima.2007.08.071