A system including a harvested plant material degradation system, a microbial growth system in fluid contact with the harvested plant material degradation system, and an intermediary animal system in biomass-transfer interaction with the microbial growth system is disclosed. The intermediary animal can be fed to a product animal for consumption by the product animal. The intermediary animal can be worms, annelids, arthropods, mollusks, and/or fish. The intermediary animal can be provided for human consumption and/or consumption by a product animal, such as a crustacean, mollusk, fish, bird, pig, goat or cow. The product animal can be subsequently provided for human consumption. The harvested plant material degradation system can include polyculture plant material or photosynthetically produced material obtained from a single species of plant.