Whole-Ecosystem Warming Increases Plant-Available Nitrogen and Phosphorus in an Ombrotrophic Bog
Abstract
Warming is expected to increase the net release of carbon from peatland soils, contributing to future warming. This positive feedback may be moderated by the response of peatland vegetation to rising atmospheric [CO2] or to increased soil nutrient availability. We asked whether a gradient of whole-ecosystem warming (from + 0 °C to + 9 °C) would increase plant-available nitrogen and phosphorus in an ombrotrophic bog in northern Minnesota, USA, and whether elevated [CO2] would modify the nutrient response. We tracked changes in plant-available nutrients across space and through time and in comparison with other nutrient pools, and assessed whether nutrient warming responses were captured by a point version of the land-surface model, ELM-SPRUCE. We found that warming exponentially increased plant-available ammonium and phosphate, but that nutrient dynamics were unaffected by elevated [CO2]. The warming response increased by an order of magnitude between the first and fourth year of the experimental manipulation, perhaps because of dramatic mortality of Sphagnum mosses in the surface peat of the warmest treatments. However, neither the magnitude nor the temporal dynamics of the responses were captured by ELM-SPRUCE. Here, relative increases in plant-available ammonium and phosphate with warming were similar, but the response varied across raisedmore »
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- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- XCEL Engineering, Oak Ridge, TN (United States)
- Michigan State Univ., Hickory Corners, MI (United States)
- Michigan Technological Univ., Houghton, MI (United States)
- Boise State Univ., ID (United States)
- Univ. of Zurich (Switzerland)
- Univ. of Tennessee, Knoxville, TN (United States)
- USDA Forest Service, Grand Rapids, MN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1856703
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Ecosystems
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 1; Journal ID: ISSN 1432-9840
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Iversen, Colleen M., Latimer, John M., Brice, Deanne J., Childs, Joanne, Vander Stel, Holly M., Defrenne, Camille E., Graham, Jake, Griffiths, Natalie A., Malhotra, Avni, Norby, Richard J., Oleheiser, Keith C., Phillips, Jana R., Salmon, Verity G., Sebestyen, Stephen D., Yang, Xiaojuan, and Hanson, Paul J. Whole-Ecosystem Warming Increases Plant-Available Nitrogen and Phosphorus in an Ombrotrophic Bog. United States: N. p., 2022.
Web. doi:10.1007/s10021-022-00744-x.
Iversen, Colleen M., Latimer, John M., Brice, Deanne J., Childs, Joanne, Vander Stel, Holly M., Defrenne, Camille E., Graham, Jake, Griffiths, Natalie A., Malhotra, Avni, Norby, Richard J., Oleheiser, Keith C., Phillips, Jana R., Salmon, Verity G., Sebestyen, Stephen D., Yang, Xiaojuan, & Hanson, Paul J. Whole-Ecosystem Warming Increases Plant-Available Nitrogen and Phosphorus in an Ombrotrophic Bog. United States. https://doi.org/10.1007/s10021-022-00744-x
Iversen, Colleen M., Latimer, John M., Brice, Deanne J., Childs, Joanne, Vander Stel, Holly M., Defrenne, Camille E., Graham, Jake, Griffiths, Natalie A., Malhotra, Avni, Norby, Richard J., Oleheiser, Keith C., Phillips, Jana R., Salmon, Verity G., Sebestyen, Stephen D., Yang, Xiaojuan, and Hanson, Paul J. Tue .
"Whole-Ecosystem Warming Increases Plant-Available Nitrogen and Phosphorus in an Ombrotrophic Bog". United States. https://doi.org/10.1007/s10021-022-00744-x. https://www.osti.gov/servlets/purl/1856703.
@article{osti_1856703,
title = {Whole-Ecosystem Warming Increases Plant-Available Nitrogen and Phosphorus in an Ombrotrophic Bog},
author = {Iversen, Colleen M. and Latimer, John M. and Brice, Deanne J. and Childs, Joanne and Vander Stel, Holly M. and Defrenne, Camille E. and Graham, Jake and Griffiths, Natalie A. and Malhotra, Avni and Norby, Richard J. and Oleheiser, Keith C. and Phillips, Jana R. and Salmon, Verity G. and Sebestyen, Stephen D. and Yang, Xiaojuan and Hanson, Paul J.},
abstractNote = {Warming is expected to increase the net release of carbon from peatland soils, contributing to future warming. This positive feedback may be moderated by the response of peatland vegetation to rising atmospheric [CO2] or to increased soil nutrient availability. We asked whether a gradient of whole-ecosystem warming (from + 0 °C to + 9 °C) would increase plant-available nitrogen and phosphorus in an ombrotrophic bog in northern Minnesota, USA, and whether elevated [CO2] would modify the nutrient response. We tracked changes in plant-available nutrients across space and through time and in comparison with other nutrient pools, and assessed whether nutrient warming responses were captured by a point version of the land-surface model, ELM-SPRUCE. We found that warming exponentially increased plant-available ammonium and phosphate, but that nutrient dynamics were unaffected by elevated [CO2]. The warming response increased by an order of magnitude between the first and fourth year of the experimental manipulation, perhaps because of dramatic mortality of Sphagnum mosses in the surface peat of the warmest treatments. However, neither the magnitude nor the temporal dynamics of the responses were captured by ELM-SPRUCE. Here, relative increases in plant-available ammonium and phosphate with warming were similar, but the response varied across raised hummocks and depressed hollows and with peat depth. Plant-available nutrient dynamics were only loosely correlated with inorganic and organic porewater nutrients, likely representing different processes. Future predictions of peatland nutrient availability under climate change scenarios must account for dynamic changes in nutrient acquisition by plants and microbes, as well as microtopography and peat depth.},
doi = {10.1007/s10021-022-00744-x},
journal = {Ecosystems},
number = 1,
volume = 26,
place = {United States},
year = {Tue Mar 22 00:00:00 EDT 2022},
month = {Tue Mar 22 00:00:00 EDT 2022}
}
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The effects of temperature and nitrogen and sulfur additions on carbon accumulation in a nutrient-poor boreal mire: Decadal effects assessed using 210 Pb peat chronologies
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The fate of phosphorus during pedogenesis
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