A multi-omics study published in Frontiers in Microbiology examined how Ascophyllum nodosum affects rumen function and microbial populations.
The research found that:
- Overall rumen fermentation and methane production were maintained, indicating no disruption to digestion
- Ascophyllum nodosum reduced E. coli O157:H7 levels, supporting a healthier microbial environment
- The seaweed had no substantial effect of the main rumen microbiome, showing that the community is highly resilient.
- Natural compounds in the seaweed (phlorotannins) altered protein breakdown, indicating that concentration is important to improve or prevent negative impacts on protein metabolism.
These findings highlight the functional role of seaweed as a natural feed additive that can target specific pathogens - such as E. coli - without disrupting general rumen fermentation.