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Non-additive microbial community responses to environmental complexity.

Alan R Pacheco1,2, Melisa L Osborne1,2, Daniel Segrè3,4,5,6,7

  • 1Graduate Program in Bioinformatics, Boston University, Boston, MA, USA.

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|April 23, 2021
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Summary
This summary is machine-generated.

Microbial community growth yield can increase with environmental complexity, but diversity often decreases. Factors like species similarity and metabolic interactions explain these microbial ecosystem dynamics.

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Area of Science:

  • Microbiology
  • Ecology
  • Systems Biology

Background:

  • Environmental composition significantly influences microbiome dynamics, but the underlying principles are not well understood.
  • Microbial communities play crucial roles in various ecosystems and biotechnological applications.

Purpose of the Study:

  • To investigate general principles governing microbial community growth yield and diversity in response to increasing environmental complexity.
  • To identify key ecological and metabolic factors that modulate community responses to environmental changes.

Main Methods:

  • Assembled hundreds of synthetic microbial consortia in vitro.
  • Formulated metrics for epistatic interactions between environments.
  • Compared experimental results with simulations from consumer resource models.

Main Results:

  • Microbial growth yield can remain constant or increase non-additively with environmental complexity.
  • Taxonomic diversity in complex environments is often lower than predicted.
  • Species similarity, specialization, and metabolic interactions significantly influence non-additivity and community responses.

Conclusions:

  • Environmental complexity alone does not guarantee increased microbial community diversity.
  • Metabolic and ecological factors are critical for understanding and controlling microbial ecosystem behavior.
  • Findings offer practical guidance for designing and managing microbial ecosystems.