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The human gut microbiome evolves rapidly, influencing its community structure. These evolutionary shifts impact distant microbes, suggesting local evolutionary history shapes microbiome function for personalized medicine.

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Area of Science:

  • Microbiome research
  • Evolutionary biology
  • Community ecology

Background:

  • The human gut microbiota evolves on human-relevant timescales.
  • Little is known about how microbial evolution impacts community composition.
  • Understanding these dynamics is crucial for microbiome engineering and personalized medicine.

Purpose of the Study:

  • To investigate the link between short-term microbial evolution and ecological structure in the human gut.
  • To determine if evolutionary changes in the microbiota influence community composition beyond the evolving species.
  • To explore the underlying mechanisms driving these ecological and evolutionary feedbacks.

Main Methods:

  • Ecological and evolutionary analyses of a large cohort of human gut metagenomes.
  • Correlation analysis to link microbial evolution with community structure shifts.
  • Resource competition modeling to simulate ecological feedbacks.

Main Results:

  • Short-term evolution of the gut microbiota is significantly linked with shifts in its ecological structure.
  • These correlations involve fluctuations in distantly related taxa, not just expansions of evolving species.
  • Similar ecological and evolutionary feedbacks emerge in simple resource competition models.

Conclusions:

  • The structure and function of the host gut microbiota may be shaped by its local evolutionary history.
  • These findings have potential implications for personalized medicine and microbiome engineering.
  • Microbial evolution and community ecology are intricately linked within the host.