BRS5(PM1) - Microbial Ecological Turnover & Competitive Selection
1. Definition
Continuous renewal of the gut microbial ecosystem driven by substrate availability and ecological competition, leading to selection of taxa and functions over time.
Within BRS5, this PM captures the ecological-selection layer that sits beneath BRS5(FM2) - Microbial Metabolite Signalling Capacity, where repeated substrate exposures shape which microbial functions are maintained or lost [1][2][3].
2. Intervention Breakdown
Food-State Dominant
3. Functional Role
↑ alpha diversity; ↑ functional redundancy; ↓ dysbiosis risk
4. Mechanistic Basis
Summary
BRS5(PM1) links plant diversity, fibre-class variety, polyphenol exposure, and meal regularity to microbial selection pressures that shape ecology over time [1][2][3].
Ecological turnover and microbial selection pressure
(Ecology rather than single strain logic)
This PM is about continuous ecosystem shaping rather than one-off strain addition. Repeated dietary exposures influence which taxa and functions are competitively favoured.
(Dietary drivers)
Multiple fibre classes, broad plant diversity, polyphenol exposure, and lower ultra-processed food pressure create the ecological conditions in which beneficial functions are more likely to persist.
(Rhythm context)
Because microbial ecosystems also respond to feeding rhythms, this PM links outward to BRS6(PM5) - Circadian Feeding & Light-Dark Entrainment.
5. Underlying Mechanisms and Requirements
5.1 Co-factors
- circadian regularity
- fermentable fibre
- meal regularity
- polyphenols
5.2 KCs (Key Constraints)
- BRS5(KC1) - Fermentable Fibre Availability
- BRS5(KC2) - Polyphenol & Plant-Diversity Input Availability
5.3 Cross-BRS Links
6. Dietary Levers
Diet
- Diverse plant inputs ← herbs, spices, legumes, whole grains, vegetables
- Multiple fibre classes ← inulin, pectin, resistant starch sources
- Polyphenol exposure ← berries, green tea, cocoa
7. Lifestyle Levers
Lifestyle
- Consistent meal timing may help support microbial rhythm stability.
- Repeated dietary pattern quality matters more than occasional microbiome-focused meals.
8. Scoreable Inputs & Modulation Signals
This PM is scoreable through ecological-diversity and repeated substrate-exposure signals.
Scoreable Input Categories
| Input Category | Example Inputs | PM1 Relevance |
|---|---|---|
| Functional Property Potentials | plant_diversity; multiple_fibre_classes; polyphenol_density | May support ecological turnover and selection. |
| Realised Functional States | diversity_rich_pattern; fibre_class_rotation | Reflect practical ecological-support states. |
| Substance / Nutrient Signals | fermentable_fibre; polyphenols | Direct ecological input signals for this PM. |
| Preparation Transformations | minimally_processed_plant_matrix | May preserve ecological-input diversity. |