Articles | Volume 15, issue 13
Biogeosciences, 15, 3937–3951, 2018
Biogeosciences, 15, 3937–3951, 2018

Research article 02 Jul 2018

Research article | 02 Jul 2018

Response of hydrology and CO2 flux to experimentally altered rainfall frequency in a temperate poor fen, southern Ontario, Canada

Danielle D. Radu and Tim P. Duval

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Cited articles

Adkinson, A. C. and Humphreys, E. R.: The response of carbon dioxide exchange to manipulations of Sphagnum water content in an ombrotrophic bog, Ecohydrology, 4, 733–743,, 2011. 
Admiral, S. W. and P. M. Lafleur.: Partitioning of latent heat flux at a northern peatland, Aquat. Botany, 86, 107–116,, 2007. 
Alm, J., Schulman, L., Walden, J., Nykanen, H., Martikainen, P. J., and Silvola, J.: Carbon balance of a boreal bog within a year with an exceptionally dry summer, Ecology, 80, 161–174,[0161:CBOABB]2.0.CO;2, 1999. 
Bragazza, L., Parisod, J., Buttler, A., and Bardgett, R. D.: Biogeochemical plant-soil microbe feedback in response to climate warming in peatlands, Nat. Clim. Change, 3, 273–277,, 2013. 
Burwasser, C. J.: Quaternary geology of the collingwood-nottawasaga area, southern ontario; ontario div. mines, prelim, Map P. 919 Geol. Ser., scale 1:50,000, 1974. 
Short summary
Climate change can shift rainfall into fewer, more intense events with longer dry periods, leading to changes in peatland hydrology and carbon cycling. We manipulated rain events over three peatland plant types (moss, sedge, and shrub). We found increasing regime intensity led to drier surface soils and deeper water tables, reducing plant carbon uptake. Mosses became sources of CO2 after >3 consecutive dry days. This study shows peatlands may become smaller sinks for carbon due to rain changes.
Final-revised paper