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A coexistence theory in microbial communities.

Marina Dohi1, Akihiko Mougi1

  • 1Department of Biological Science, Faculty of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-cho, Matsue 690-8504, Japan.

Royal Society Open Science
|March 7, 2019
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Summary
This summary is machine-generated.

Microbial communities maintain stability through pH-driven interactions. A balanced composition enhances ecosystem resilience, crucial for both ecology and human health.

Keywords:
bistabilityindirect interactionmathematical modelmicrobial communitypHresilience

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Area of Science:

  • Microbial Ecology
  • Theoretical Ecology
  • Environmental Microbiology

Background:

  • Microbial communities are ubiquitous in ecosystems, playing vital roles in ecology and human health.
  • Understanding the maintenance mechanisms of complex microbial ecosystems remains a significant challenge.
  • Microbial dynamics are crucial for ecosystem function and stability.

Purpose of the Study:

  • To present a theoretical model explaining the dynamics of microbial community structure.
  • To investigate the role of pH-mediated interactions in microbial community stability.
  • To explore how microbial composition influences ecosystem resilience.

Main Methods:

  • Development of a simple mathematical theory for microbial community dynamics.
  • Modeling pH-driven interactions between bacterial populations.
  • Analysis of bistability and equilibrium states in microbial ecosystems.
  • Investigation of trade-offs between bacterial growth and pH modification.

Main Results:

  • pH-driven interactions lead to bistability in microbial community composition.
  • Bacteria indirectly inhibit competitors by altering environmental pH to their optimum.
  • Moderate abundance ratios of different bacterial types enhance resilience.
  • A trade-off between growth and pH modification ability impacts community stability.

Conclusions:

  • The balance of microbial community composition is critical for maintaining ecosystem stability.
  • pH regulation by microbes is a key factor in structuring microbial ecosystems.
  • Theoretical insights into microbial dynamics can inform ecological and health-related research.