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Strong environmental memory revealed by experimental evolution in static and fluctuating environments.

Clare I Abreu1, Shaili Mathur1, Dmitri A Petrov1

  • 1Department of Biology, Stanford University; Stanford CA, USA.

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Summary
This summary is machine-generated.

Environmental fluctuations significantly impact evolution, causing non-additive fitness and "environmental memory" in yeast populations. This suggests static environment variance can predict fitness in dynamic conditions.

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Area of Science:

  • Evolutionary Biology
  • Microbial Evolution
  • Population Genetics

Background:

  • Evolution in stable laboratory settings often involves large-effect mutations.
  • Natural environments fluctuate, posing challenges not present in static conditions.
  • Predicting fitness in fluctuating environments assumes a time-average of static fitness, but transitions can cause deviations.

Conclusions:

  • Environmental fluctuations have substantial impacts on evolutionary trajectories and fitness.
  • Fitness non-additivity and environmental memory are common phenomena in fluctuating environments.
  • Variance in static environments can serve as a predictor for fitness impacts in dynamic conditions.