Articles | Volume 9, issue 2
https://doi.org/10.5194/soil-9-623-2023
https://doi.org/10.5194/soil-9-623-2023
Original research article
 | 
22 Dec 2023
Original research article |  | 22 Dec 2023

Contrasting potential for biological N2 fixation at three polluted central European Sphagnum peat bogs: combining the 15N2-tracer and natural-abundance isotope approaches

Marketa Stepanova, Martin Novak, Bohuslava Cejkova, Ivana Jackova, Frantisek Buzek, Frantisek Veselovsky, Jan Curik, Eva Prechova, Arnost Komarek, and Leona Bohdalkova

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Cited articles

Basilier, K.: Moss-associated nitrogen fixation in some mire and coniferous forest environments around Uppsala, Sweden, Lindbergia, 5, 84–88, 1979. 
Basilier, K., Granhall, U., Stenström, T.-A., and Stenstrom, T.-A.: Nitrogen fixation in wet minerotrophic moss communities of a subarctic mire, Oikos, 31, 236–246, https://doi.org/10.2307/3543568, 1978. 
Bellenger, J. P., Darnajoux, R., Zhang, X., and Kraepiel, A. M. L.: Biological nitrogen fixation by alternative nitrogenases in terrestrial ecosystems: A review, Biogeochemistry, 149, 53–73, https://doi.org/10.1007/s10533-020-00666-7, 2020. 
Bohdalkova, L., Curik, J., Kubena, A. A., and Buzek, F.: Dynamics of methane fluxes from two peat bogs in the Ore Mountains, Czech Republic, Plant Soil Environ., 59, 14–21, https://doi.org/10.17221/330/2012-PSE, 2013. 
Bohdalkova, L., Novak, M., Stepanova, M., Fottova, D., Chrastny, V., Mikova, J., and Kubena, A. A.: The fate of atmospherically derived Pb in Central European catchments: Insights from spatial and temporal pollution gradients and Pb isotope ratios, Environ. Sci. Technol., 48, 4336–4343, https://doi.org/10.1021/es500393z, 2014. 
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Short summary
Biological N2 fixation helps to sustain carbon accumulation in peatlands and to remove CO2 from the atmosphere. Changes in N2 fixation may affect the dynamics of global change. Increasing inputs of reactive N from air pollution should lead to downregulation of N2 fixation. Data from three N-polluted peat bogs show an interplay of N2-fixation rates with 10 potential drivers of this process. N2 fixation was measurable only at one site characterized by high phosphorus and low sulfate availability.