Fungi

Lignin

Hemicelluloses

Lignin

Cellulose

Cellulolytic microbiota

e.g. Ruminococcus Flavefaecin

Hemi cellulolytic microbiota

Saccharomyces cerevisiae CNCM I-1077

+ Colonization

+ Colonization

+ Density

(E.g. Fibrobacter succinogenes)

Fig 5.: A proposed scheme for mode of action of Saccharomyces cerevisiae CNCM I-1077 on fibre degrading communities