FIG 3.

Described and possible AOM processes with different terminal electron acceptors. AOM with sulfate, nitrate, or nitrite as the electron acceptor is well described, along with the microbes involved (indicated by green bars), whereas AOM with manganese and iron has been shown, but the microbes involved need to be characterized (indicated by blue bars). Other possible electrons are indicated in the bottom part of the figure according to the thermodynamic calculation of the chemical reaction (indicated by an orange bar).