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Resurrection of Dormant Daphnia magna: Protocol and Applications
Published on: January 19, 2018
19.6K
Evolutionary rescue can be impeded by temporary environmental amelioration.
Yi-Qi Hao1,2, Michael A Brockhurst3, Owen L Petchey1,4
1Institute for Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland.
Ecology Letters
|June 30, 2015
Summary
Environmental fluctuations can hinder evolutionary rescue. While temporary improvements may aid population recovery, they can also relax selection, ultimately reducing a population
Area of Science:
- Evolutionary biology
- Ecology
- Genetics
Background:
- Rapid evolutionary adaptation is crucial for species survival amid environmental changes.
- The impact of short-term environmental fluctuations during long-term deterioration on evolutionary rescue remains unclear.
- Realistic environmental changes often involve fluctuations superimposed on long-term trends.
Discussion:
- Temporary environmental amelioration can have opposing effects: facilitating population recovery (demographic effect) or impeding adaptation by relaxing selection (genetic effect).
- This study investigates these effects using bacteriophage virus populations under gradually increasing temperatures.
- Periodic reductions in temperature (amelioration) were introduced to simulate environmental fluctuations.
Key Insights:
- Environmental fluctuations initially promoted demographic recovery in bacteriophage populations.
- However, these fluctuations ultimately decreased the frequency of successful evolutionary rescue.
- The findings suggest that environmental fluctuations can reduce the potential for evolutionary rescue.
Outlook:
- Further research is needed to understand the complex interplay between environmental fluctuations and evolutionary adaptation.
- Predicting the success of evolutionary rescue in fluctuating environments requires considering both demographic and genetic factors.
- These insights are vital for conservation strategies in the face of climate change and other environmental stressors.
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