Emission of Methane by Eudrilus eugeniae and Other Earthworms from Brazil
2012
Depkat-Jakob, Peter S. | Hunger, Sindy | Schulz, Kristin | Brown, George G. | Tsai, Siu M. | Drake, Harold L.
Earthworms emit denitrification-derived nitrous oxide and fermentation-derived molecular hydrogen. The present study demonstrated that the earthworm Eudrilus eugeniae, obtained in Brazil, emitted methane. Other worms displayed a lesser or no capacity to emit methane. Gene and transcript analyses of mcrA (encoding the alpha subunit of methyl-CoM reductase) in gut contents of E. eugeniae suggested that Methanosarcinaceae, Methanobacteriaceae, and Methanomicrobiaceae might be associated with this emission.
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