OOecologia3/30/2026The distinct amino acid carbon isotope fingerprint of obligate anaerobic bacteria allows estimation of gut bacteria as protein sources for herbivorous mammalsGarrett A. Savory·Diane M. O’Brien·Claire Montgomerie·Knut Kielland·John E. Blake·John A. Crouse·Mario E. Muscarella·Daniel P. ThompsonRead at OecologiaTagsIsotope Analysis in EcologyEcology