Details

Autor(en) / Beteiligte

• Lopes, F.
• Viollier, E.
• Thiam, A.
• Michard, G.
• Abril, G.
• Groleau, A.
• Prévot, F.
• Carrias, J.-F.
• Albéric, P.
• Jézéquel, D.

Titel

Biogeochemical modelling of anaerobic vs. aerobic methane oxidation in a meromictic crater lake (Lake Pavin, France)

Ist Teil von

• Applied geochemistry, 2011-12, Vol.26 (12), p.1919-1932

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► Aerobic and anaerobic methane oxidations likely occur in the water column of Lake Pavin. ► Seasonal differences in aerobic and anaerobic methane oxidation rates are detected. ► Iron dependent anaerobic methane oxidation may contribute to methane consumption in the water column. ► Aerobic methane oxidation appears as the major sink of methane in the Lake Pavin. Methane is a powerful greenhouse gas and its concentration in the atmosphere has increased over the past decades. Methane produced by methanogenic Archae can be consumed through aerobic and anaerobic oxidation pathways. In anoxic conditions found in freshwater environments such as meromictic lakes, CH 4 oxidation pathways involving different terminal electron acceptors such as NO 3 - , SO 4 2 - , and oxides of Fe and Mn are thermodynamically possible. In this study, a reactive transport model was developed to assess the relative significance of the different pathways of CH 4 consumption in the water column of Lake Pavin. In most cases, the model reproduced experimental data collected from the field from June 2006 to June 2007. Although the model and the field measurements suggest that anaerobic CH 4 oxidation may contribute to CH 4 consumption in the water column of Lake Pavin, aerobic oxidation remains the major sink of CH 4 in this lake.