Temporal Variability of Methane Emission from a Raised Bog in Western Siberia

Veretennikova, Elena E.; Dyukarev, E. A.; Kurina, Irina V.

doi:10.1134/s1024856022060288

Cited by 1 publication

(2 citation statements)

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“…To support this observation, it is important to emphasize that negative F CH4 values were experimentally measured and thus precisely represent the data rather than being a potential artifact of data interpolation. Negative F CH4 values match the literature and possibly result from the methanotrophic activity often found in the upper layer of the peatland. ,, Despite the observed capture of CH 4 , the net mean F CH4 was consistently positive among each plot, ranging from 0.48 to 2.37 mg m –2 h –1 (Table ).…”

Section: Resultssupporting

confidence: 77%

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Fine-Scale Spatial Variability of Greenhouse Gas Emissions From a Subantarctic Peatland Bog

Riquelme del Río,

Sepulveda-Jauregui,

Salas-Rabaza

et al. 2024

Environ. Sci. Technol.

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Peatlands are recognized as crucial greenhouse gas sources and sinks and have been extensively studied. Their emissions exhibit high spatial heterogeneity when measured on site using flux chambers. However, the mechanism by which this spatial variability behaves on a very fine scale remains unclear. This study investigates the fine-scale spatial variability of greenhouse gas emissions from a subantarctic Sphagnum peatland bog. Using a recently developed skirt chamber, methane emissions and ecosystem respiration (as carbon dioxide) were measured at a submeter scale resolution, at five specific 3 × 3 m plots, which were examined across the site throughout a single campaign during the Austral summer season. The results indicated that methane fluxes were significantly less homogeneously distributed compared with ecosystem respiration. Furthermore, we established that the spatial variation scale, i.e., the minimum spatial domain over which notable changes in methane emissions and ecosystem respiration occur, was <0.56 m2. Factors such as ground height relative to the water table and vegetation coverage were analyzed. It was observed that Tetroncium magellanicum exhibited a notable correlation with higher methane fluxes, likely because of the aerenchymatous nature of this species, facilitating gas transport. This study advances understanding of gas exchange patterns in peatlands but also emphasizes the need for further efforts for characterizing spatial dynamics at a very fine scale for precise greenhouse gas budget assessment.

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Section: Resultssupporting

confidence: 77%

“…Negative F CH4 values match the literature and possibly result from the methanotrophic activity often found in the upper layer of the peatland. 36 , 38 , 39 Despite the observed capture of CH 4 , the net mean F CH4 was consistently positive among each plot, ranging from 0.48 to 2.37 mg m –2 h –1 ( Table 1 ).…”

Section: Resultsmentioning

confidence: 98%