| Blodau, C; Siems, M; Beer, J: Experimental burial inhibits methanogenesis and anaerobic decomposition in water-saturated peats, Environmental Science and Technology (2011) | |
| Abstract: A mechanistic understanding of carbon (C) sequestration and methane (CH4) production is of great interest due to the importance of these processes for the global C budget. Here we demonstrate experimentally, by means of column experiments, that burial of water saturated, anoxic bog peat leads to inactivation of anaerobic respiration and methanogenesis. This effect can be related to the slowness of diffusive transport of solutes and evolving energetic constraints on anaerobic respiration. Burial lowered decomposition constants in homogenized peat sand mixtures from about 10-5 to 10-7 yr-1, which is considerably slower than previously assumed, and methanogenesis slowed down in a similar manner. The latter effect could be related to acetoclastic methanogenesis approaching a minimum energy quantum of – 25 kJ mol-1 (CH4). Given the robustness of hydraulic properties that locate the oxic-anoxic boundary near the peatland surface and constrain solute transport deeper into the peat, this effect has likely been critical for building the peatland C store and will continue supporting long-term C sequestration in northern peatlands even under moderately changing climatic conditions. |
Aktuelle Termine
Aktuelle Termine
| BayCEER-Kolloquium: |
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| Do. 25.04.2024 Perspectives and challenges in the restoration and conservation of two isolated habitats: gypsum and cliffs |
| BayCEER Short Courses: |
| Mi. 24.04.2024 aktuell Mobile Film Making Workshop (for PhDs/PostDosc/Profs of BayCEER) |
| Fr. 26.04.2024 Mobile Film Making Workshop (for students of BayCEER) |
| Ökologisch-Botanischer Garten: |
| Fr. 26.04.2024 Aktion | Kräuterreich & regional: Backkunst im ÖBG (zus. mit HWK) |
| Fr. 26.04.2024 Führung | Erdbeer-Minze und Zimmerknoblauch: Gewürzkräuter |