Articles | Volume 14, issue 9
https://doi.org/10.5194/bg-14-2481-2017
https://doi.org/10.5194/bg-14-2481-2017
Research article
 | 
17 May 2017
Research article |  | 17 May 2017

Long-term carbon and nitrogen dynamics at SPRUCE revealed through stable isotopes in peat profiles

Erik A. Hobbie, Janet Chen, Paul J. Hanson, Colleen M. Iversen, Karis J. McFarlane, Nathan R. Thorp, and Kirsten S. Hofmockel

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Cited articles

Alewell, C., Giesler, R., Klaminder, J., Leifeld, J., and Rollog, M.: Stable carbon isotopes as indicators for environmental change in palsa peats, Biogeosciences, 8, 1769–1778, https://doi.org/10.5194/bg-8-1769-2011, 2011.
Asada, T., Warner, B. G., and Aravena, R.: Nitrogen isotope signature variability in plant species from open peatland, Aquat. Bot., 82, 297–307, 2005a.
Asada, T., Warner, B., and Aravena, R.: Effects of the early stage of decomposition on change in carbon and nitrogen isotopes in Sphagnum litter, J. Plant Interact., 1, 229–237, 2005b.
Bayley, S. E., Thormann, M. N., and Szumigalski, A. R.: Nitrogen mineralization and decomposition in western boreal bog and fen peat, Ecoscience, 12, 455–465, 2005.
Belyea, L. R. and Malmer, N.: Carbon sequestration in peatland: patterns and mechanisms of response to climate change, Glob. Change Biol., 10, 1043–1052, 2004.
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Short summary
We measured carbon and nitrogen isotope ratios (13C : 12C and 15N : 14N) in peat cores in a northern Minnesota bog to understand how climate, vegetation type, and decomposition affected C and N budgets over the last 9000 years. 13C : 12C patterns were primarily influenced by shifts in temperature, peatland vegetation and atmospheric CO2, whereas tree colonization and upland N influxes affected 15N : 14N ratios. Isotopic markers provided new insights into long-term patterns of CO2 and nitrogen losses.
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