Articles | Volume 17, issue 23
https://doi.org/10.5194/bg-17-6247-2020
https://doi.org/10.5194/bg-17-6247-2020
Research article
 | 
10 Dec 2020
Research article |  | 10 Dec 2020

Water flow controls the spatial variability of methane emissions in a northern valley fen ecosystem

Hui Zhang, Eeva-Stiina Tuittila, Aino Korrensalo, Aleksi Räsänen, Tarmo Virtanen, Mika Aurela, Timo Penttilä, Tuomas Laurila, Stephanie Gerin, Viivi Lindholm, and Annalea Lohila

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Cited articles

Abdalla, M., Hastings, A., Truu, J., Espenberg, M., Mander, U., and Smith, P.: Emissions of methane from northern peatlands: a review of management impacts and implications for future management options, Ecol. Evol., 6, 7080–7102, https://doi.org/10.1002/ece3.2469, 2016. 
Aerts, R., Verhoeven, J. T. A., and Whigham, D. F.: Plant-mediated controls on nutrient cycling in temperate fens and bogs, Ecology, 80, 2170–2181, https://doi.org/10.1890/0012-9658(1999)080[2170:Pmconc]2.0.Co;2, 1999. 
Alm, J., Shurpali, N. J., Tuittila, E.-S., Laurila, T., Maljanen, M., Saarnio, S., and Minkkinen, K.: Methods for determining emission factors for the use of peat and peatlands – flux measurements and modelling, Boreal Environ. Res., 12, 85–100, 2007. 
Andersen, R., Poulin, M., Borcard, D., Laiho, R., Laine, J., Vasander, H., and Tuittila, E.-T.: Environmental control and spatial structures in peatland vegetation, J. Veg. Sci., 22, 878–890, https://doi.org/10.1111/j.1654-1103.2011.01295.x, 2011. 
Aurela, M., Lohila, A., Tuovinen, J. P., Hatakka, J., Riutta, T., and Laurila, T.: Carbon dioxide exchange on a northern boreal fen, Boreal Environ. Res., 14, 699–710, 2009.  
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Short summary
We studied the impact of a stream on peatland microhabitats and CH4 emissions in a northern boreal fen. We found that there were higher water levels, lower peat temperatures, and greater oxygen concentrations close to the stream; these supported the highest biomass production but resulted in the lowest CH4 emissions. Further from the stream, the conditions were drier and CH4 emissions were also low. CH4 emissions were highest at an intermediate distance from the stream.
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