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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 6
Biogeosciences, 14, 1593–1602, 2017
https://doi.org/10.5194/bg-14-1593-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 1593–1602, 2017
https://doi.org/10.5194/bg-14-1593-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 28 Mar 2017

Research article | 28 Mar 2017

Estimating global nitrous oxide emissions by lichens and bryophytes with a process-based productivity model

Philipp Porada et al.
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Abed, R., Lam, P., de Beer, D., and Stief, P.: High rates of denitrification and nitrous oxide emission in arid biological soil crusts from the Sultanate of Oman, ISME J., 7, 1862–1875, https://doi.org/10.1038/ismej.2013.55, 2013.
Barger, N., Castle, S., and Dean, G.: Denitrification from nitrogen-fixing biologically crusted soils in a cool desert environment, southeast Utah, USA, Ecological Processes, 2, 1–9, https://doi.org/10.1186/2192-1709-2-16, 2013.
Barger, N., Weber, B., Garcia-Pichel, F., Zaady, E., and Belnap, J.: Patterns and Controls on Nitrogen Cycling of Biological Soil Crusts, in: Biological Soil Crusts: An Organizing Principle in Drylands, edited by: Weber, B., Büdel, B., and Belnap, J., 257–285, Springer International Publishing, Cham, https://doi.org/10.1007/978-3-319-30214-0_14, 2016.
Barton, L., Wolf, B., Rowlings, D., Scheer, C., Kiese, R., Grace, P., Stefanova, K., and Butterbach-Bahl, K.: Sampling frequency affects estimates of annual nitrous oxide fluxes, Scientific Reports, 5, 15912, https://doi.org/10.1038/srep15912, 2015.
Bollmann, A. and Conrad, R.: Acetylene blockage technique leads to underestimation of denitrification rates in oxic soils due to scavenging of intermediate nitric oxide, Soil Biol. Biochem., 29, 1067–1077, https://doi.org/10.1016/S0038-0717(97)00007-2, 1997.
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Lichens and bryophytes have been shown to release nitrous oxide, which is a strong greenhouse gas and atmospheric ozone-depleting agent. Here we apply a process-based computer model of lichens and bryophytes at the global scale, to estimate growth and respiration of the organisms. By relating respiration to nitrous oxide release, we simulate global nitrous oxide emissions of 0.27 (0.19–0.35) Tg yr−1. Moreover, we quantify different sources of uncertainty in nitrous oxide emission rates.
Lichens and bryophytes have been shown to release nitrous oxide, which is a strong greenhouse...
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