Together, these findings position the rumen microbiome as a rich and underexplored reservoir of antimicrobial diversity, with potential

The gap

Evidence profile

Sourced from the future work and stated challenges and abstract of the source papers, classified as general, drawn from work published between 2025 and 2026, spanning 3 journals. Those papers have been cited 4 times in total.

Supporting evidence — 3 representative gaps

• Tannin-Based Strategies for Mitigating Greenhouse Gas Emissions Through Nitrogen and Carbon Metabolism in Ruminants (2025) · Agriculture · cited 4× · doi

  Current research indicates that adding tannins or their metabolites to ruminant diets can mitigate nitrous oxide emissions by altering the mode of nitrogen excretion, specifically by increasing the proportion of fecal nitrogen and decreasing urinary nitrogen. Additionally, including tannins in the diet modulates the gastrointestinal microbial ecosystem, primarily by altering the activities of methanogens and fiber-degrading microbes, thereby reducing methane emissions from ruminants. This process is influenced by factors such as the source of tannins, dosage, and dietary composition. However, tannin supplementation may negatively impact nutrient digestibility and feed intake in ruminants, emphasizing the need for a balanced approach that aligns green- house gas emissions mitigation with animal productivity. Future studies should focus on mechanistic elucidation using metagenomic, metatranscriptomic, and metabolomic analyses to characterize the microbial pathways and host–microbe interactions underlying tannin-mediated mitigation. Moreover, long-term in vivo trials under tropical and subtrop- ical conditions are essential for validating the consistency of these effects under diverse production systems. Further, integrative approaches combining tannins with complementary additives (e.g., 3-NOP, essential oils, or nitrate) should be explored to optimize synergistic effects while minimizing anti-nutritional impacts. Isotopic tracing and multi-omics data integra- tion could help to uncover the molecular regulation of nitrogen partitioning and rumen fermentation dynamics, advancing precision feeding strategies. Overall, emerging tech- nologies and context-specific trials will be critical for translating tannin-based mitigation strategies into sustainable livestock production practices. Author Contributions: Conceptualization, Y.Z.; methodology, S.Z.; writing—original draft prepa- ration, X.Z. and S.Z.; writing—review and editing, Y.Z. All authors have read and agreed to the published version of the manuscript. Funding: This research was financially supported by the Earmarked Fund for Modern Agro-Industry Technology Research System (2025CYJSTX13). Data Availability Statement: No new data were created or analyzed in this study. Data sharing is not applicable to this article. Acknowledgments: The authors express their gratitude to fellow students in the laboratory for their assistance. Conflicts of Interest: The authors declare no conflicts of interest.

  generalfuture work
  Keywords: tannins nitrogen emissions tannin mitigation authors altering microbial ruminants trials essential effects production strategies writing
• Rumen-Derived Consortia Shaped by Substrate-Specific Enrichment Show Specialized Lignocellulose Utilization, Diversified Hydrogen Metabolism, and Cryopreservation Stability (2026) · Microorganisms · doi

  Improving rumen fermentation efficiency is a key objective, offering simultaneous benefits for animal productivity and environmental sustainability. Enteric methane emissions represent a loss of 4-12% of dietary energy and are a major contributor to agricultural greenhouse gas emissions. The efficiency of ruminant production systems remains relatively low, limiting profitability and increasing environmental burdens.

  generalstated challengesevidence 5/5
  Keywords: improving rumen fermentation efficiency key objective offering simultaneous
• The Hungate1000 prokaryotic culture collection encodes a wide variety of bacteriocins (2026) · mSystems · doi

  Together, these findings position the rumen microbiome as a rich and underexplored reservoir of antimicrobial diversity, with potential for the development of targeted microbiome-modulating therapeutics, livestock interventions aimed at improving rumen function, and strategies aligned with One Health goals, including antimicrobial stewardship and methane mitigation.

  generalabstractevidence 5/5
  Keywords: rumen microbiome antimicrobial together position rich underexplored reservoir diversity potential development targeted modulating therapeutics livestock

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