Fungi

• The presence of anaerobic zoospore-producing fungi in the rumen was unknown until recently
• Up to 8% of microbial biomass
• Important group of organisms; they attach to plant material to digest the fiber
• They have solubilized small amounts of lignin from plant cell walls, breaking it down into small pieces for bacteria to digest
• High cellulose and hemicellulase activities
• Have a germination cycle of 24 hours
  

Bacteria

Protozoa