Articles | Volume 16, issue 20
Biogeosciences, 16, 4085–4095, 2019
https://doi.org/10.5194/bg-16-4085-2019
Biogeosciences, 16, 4085–4095, 2019
https://doi.org/10.5194/bg-16-4085-2019
Research article
25 Oct 2019
Research article | 25 Oct 2019

CO2 and CH4 budgets and global warming potential modifications in Sphagnum-dominated peat mesocosms invaded by Molinia caerulea

Fabien Leroy et al.

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Revised manuscript has not been submitted

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Cited articles

Armstrong, A., Waldron, S., Ostle, N. J., Richardson, H., and Whitaker, J.: Biotic and abiotic factors interact to regulate northern peatland carbon cycling, Ecosystems, 18, 1395–1409, https://doi.org/10.1007/s10021-015-9907-4, 2015. 
Beer, J. and Blodau, C.: Transport and thermodynamics constrain belowground carbon turnover in a northern peatland, Geochim. Cosmochim. Ac., 71, 2989–3002, https://doi.org/10.1016/j.gca.2007.03.010, 2007. 
Berendse, F., Van Breemen, N., Rydin, H., Buttler, A., Heijmans, M., Hoosbeek, M. R., Lee, J. A, Mitchell, E., Saarinen, T., Vasander, H., and Wallén, B.: Raised atmospheric CO2 levels and increased N deposition cause shifts in plant species composition and production in Sphagnum bogs. Glob. Change Biol., 7, 591–598, https://doi.org/10.1046/j.1365-2486.2001.00433.x, 2001. 
Bortoluzzi, E., Epron, D., Siegenthaler, A., Gilbert, D., and Buttler, A.: Carbon balance of a European mountain bog at contrasting stages of regeneration, New Phytol., 172, 708–718, https://doi.org/10.1111/j.1469-8137.2006.01859.x, 2006. 
Bragazza, L., Buttler, A., Siegenthaler, A., and Mitchell, E. A.: Plant litter decomposition and nutrient release in peatlands, Geophys. Monogr. Series, 184, 99–110, https://doi.org/10.1029/2008GM000815, 2009. 
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Short summary
This study demonstrates the implications of Molinia caerulea colonization in Sphagnum peatland on the C fluxes by enhancing the CO2 uptake by photosynthesis (but which led to higher CO2 and CH4 emissions) and also on the parameters controlling it (by increasing the temperature sensitivity of the CH4 emissions). Furthermore, roots and litter of Molinia caerulea could provide additional substrates for C emissions and should be taken into account in further works.
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