Colonic Ecosystem by pH
Companion chart to Chapter 22 — Stool pH controls microbiome content.
Axis explanation paragraph
Panel A — Population activity (ecological succession, left to right)
■ LAB and Actinobacteria (Lactobacillus, Bifidobacterium)
■ Saccharolytic Firmicutes (butyrate producers)
■ Bacteroidetes (tolerogenic LPS)
■ TGN / urease (Enterobacteriaceae)
■ Saccharolytic Firmicutes (butyrate producers)
■ Bacteroidetes (tolerogenic LPS)
■ TGN / urease (Enterobacteriaceae)
Metabolites
Survival
Microbiome Roster Cards
LAB and Actinobacteria
Lactobacillus spp.
Bifidobacterium spp.
Output: lactate
Input: prebiotics (FOS, GOS, inulin, XOS)
Firmicutes
F. prausnitzii, Roseburia
Butyrate producers
Bacteroidetes
Bacteroides, Prevotella
Output: acetate / propionate
TGN / Urease
Klebsiella, Proteus
Output: ammonia, BCFA