Fig 5. Possible competition scenarios between M. ruminantium (blue dashed line), M. smithii (red solid line) and M. formicium (black dotted line) in a hypothetical constant environment.

A. At constant dilution rate of 0.021 h^-1, M. formicium displaces the other two methanogens. B. With a constant dilution rate of 0.04 h^-1, M. smithii wins the competition. At constant environmental conditions, only one species wins and displaces the other methanogens.