Articles | Volume 22, issue 6
https://doi.org/10.5194/bg-22-1711-2025
https://doi.org/10.5194/bg-22-1711-2025
Research article
 | 
01 Apr 2025
Research article |  | 01 Apr 2025

Exploring microscale heterogeneity as a driver of biogeochemical transformations and gas transport in peat

Lukas Kohl, Petri Kiuru, Marjo Palviainen, Maarit Raivonen, Markku Koskinen, Mari Pihlatie, and Annamari Laurén

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Cited articles

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Bartholomeus, R. P., Witte, J. P. M., van Bodegom, P. M., van Dam, J. C., and Aerts, R.: Critical soil conditions for oxygen stress to plant roots: substituting the Feddes-function by a process-based model, J. Hydrol., 360, 147–165, https://doi.org/10.1016/J.JHYDROL.2008.07.029, 2008. a
Boon, A., Robinson, J. S., Nightingale, P. D., Cardenas, L., Chadwick, D. R., and Verhoef, A.: Determination of the gas diffusion coefficient of a peat grassland soil, Eur. J. Soil Sci., 64, 681–687, https://onlinelibrary.wiley.com/doi/full/10.1111/ejss.12056, 2013. a
Bratbak, G. and Dundas, I.: Bacterial dry matter content and biomass estimations, Appl. Environ. Microb., 48, 755–757, 1984. a
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We present an assay to illuminate heterogeneity in biogeochemical transformations within peat samples. For this, we injected isotope-labeled acetate into peat cores and monitored the release of label-derived gases, which we compared to microtomography images. The fraction of label converted to CO2 and the rapidness of this conversion were linked to injection depth and air-filled porosity.
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