Text and Data Mining valid from 2018-08-01
Received: 27 November 2017
Revised: 27 April 2018
Accepted: 3 June 2018
First Online: 1 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: E.C.H. planned and performed research and helped write the paper; D.H.P., J.G.V., C.P.R., C.S.M., S.E.D. and P.Ó.C. assisted with research and helped write the paper. P.R.G. and J.G.M. provided samples enabling Methanosphaera sp. PA5 isolation and helped with the preparation and review of the manuscript; and P.H., G.W.T., and M.M. planned and supervised research and wrote the paper.