Interspecies hydrogen transfer
Interspecies hydrogen transfer (IHT) is a form of interspecies electron transfer. It is a syntrophic process by which H2 is transferred from one organism to another, particularly in the rumen and other anaerobic environments.
IHT was discovered between Methanobacillus omelianskii and an "S" organism in 1967 by Marvin Bryant, Eileen Wolin, Meyer Wolin, and Ralph Wolfe at the University of Illinois. It was shown in 1973 that this process occurs between Ruminococcus albus and Wolinella succinogenes.