Articles | Volume 20, issue 16
https://doi.org/10.5194/bg-20-3449-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-3449-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
BG Letters
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18 Aug 2023
BG Letters | Highlight paper |
| 18 Aug 2023
| 18 Aug 2023
Potential bioavailability of representative pyrogenic organic matter compounds in comparison to natural dissolved organic matter pools
Earth and Biological Sciences Directorate, Pacific Northwest
National Laboratory, Richland, WA, USA
School of Biological Sciences, Washington State University,
Pullman, WA, USA
Hyun-Seob Song
Department of Biological Systems Engineering, Department of Food
Science and Technology, Nebraska Food for Health Center, University of
Nebraska, Lincoln, NE, USA
Samantha Grieger
Earth and Biological Sciences Directorate, Pacific Northwest
National Laboratory, Richland, WA, USA
Marine and Coastal Research Laboratory, Pacific Northwest National
Laboratory, Richland, WA, USA
Vanessa A. Garayburu-Caruso
Earth and Biological Sciences Directorate, Pacific Northwest
National Laboratory, Richland, WA, USA
School of the Environment, Washington State University, Richland, WA,
USA
James C. Stegen
Earth and Biological Sciences Directorate, Pacific Northwest
National Laboratory, Richland, WA, USA
School of the Environment, Washington State University, Pullman, WA, USA
Kevin D. Bladon
Department of Forest Engineering, Resources, and Management, Oregon
State University, Corvallis, OR, USA
Allison N. Myers-Pigg
Earth and Biological Sciences Directorate, Pacific Northwest
National Laboratory, Richland, WA, USA
Marine and Coastal Research Laboratory, Pacific Northwest National
Laboratory, Richland, WA, USA
University of Toledo, Department of Environmental Sciences, Toledo, OH, USA
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Conceptual models link microbes with the environment but are untested. We test a recent model using riverbed sediments. We exposed sediments to disturbances, going dry and becoming wet again. As the length of dry conditions got longer, there was a sudden shift in the ecology of microbes, chemistry of organic matter, and rates of microbial metabolism. We propose a new model based on feedbacks initiated by disturbance that cascade across biological, chemical, and functional aspects of the system.
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Co-editor-in-chief
Intensifying wildfire regimes in many parts of the world are increasing the production of pyrogenic organic matter (PyOM), with potential implications for water supplies that are critical for domestic, industrial, agricultural, and ecological needs. This study provides a novel assessment of the influence of PyOM on aquatic ecosystems and showed that PyOM can be actively transformed in aquatic ecosystems and may be an increasing source of C emissions to the atmosphere as the prevalence of wildfires increases.
Intensifying wildfire regimes in many parts of the world are increasing the production of...
Short summary
Intensifying wildfires are increasing pyrogenic organic matter (PyOM) production and its impact on water quality. Recent work indicates that PyOM may have a greater impact on aquatic biogeochemistry than previously assumed, driven by higher bioavailability. We provide a full assessment of the potential bioavailability of PyOM across its chemical spectrum. We indicate that PyOM can be actively transformed within the river corridor and, therefore, may be a growing source of riverine C emissions.
Intensifying wildfires are increasing pyrogenic organic matter (PyOM) production and its impact...
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