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Evolution of New Traits in Microbes

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Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
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SIZE DOESN'T MATTER: MICROBIAL SELECTION EXPERIMENTS ADDRESS ECOLOGICAL PHENOMENA.

Michael Feldgarden1, Daniel M Stoebel, Dustin Brisson

  • 1Department of Ecology and Evolution, Stony Brook University, Stony Brook, New York 11794-5245 USA.

Ecology
|March 23, 2011
PubMed
Summary
This summary is machine-generated.

Experimental evolution uses microbial selection experiments to study how environments shape metabolism and ecological diversification. These studies reveal genotype-by-environment interactions and mechanisms of negative frequency-dependent selection.

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Last Updated: Jun 3, 2026

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Published on: July 30, 2019

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07:40

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Published on: October 29, 2016

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The Use of Chemostats in Microbial Systems Biology

Published on: October 14, 2013

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Microbiology

Background:

  • Experimental evolution connects physiology, particularly metabolism, to ecological questions.
  • Microbial selection experiments offer a tractable model for studying the environment's influence on metabolic evolution.
  • These experiments allow examination of natural selection's causal elements by linking traits, environments, and fitness.

Purpose of the Study:

  • To review the methodology of microbial evolution experiments.
  • To address key issues relevant to ecologists: genotype-by-environment interactions, ecological diversification, and negative frequency-dependent selection.
  • To explore the mechanistic basis of ecological diversification in microbial systems.

Main Methods:

  • Review of experimental evolution methodologies in microbial systems.
  • Analysis of genotype-by-environment interactions.
  • Investigation of ecological specialization mechanisms, including antagonistic pleiotropy.
  • Examination of negative frequency-dependent selection in laboratory settings.

Main Results:

  • Genotype-by-environment interactions are predicted to be ubiquitous.
  • Mechanisms beyond antagonistic pleiotropy contribute to ecological specialization.
  • Negative frequency-dependent selection may maintain diversity but is potentially limited to specific environmental conditions with substitutable resources.

Conclusions:

  • Microbial experimental evolution is a powerful tool for understanding ecological and evolutionary processes.
  • Further integration of molecular techniques is crucial for a mechanistic understanding of ecological diversification.
  • The study highlights the complexity of evolutionary responses to environmental pressures in microbial systems.