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Microbial dormancy and boom-and-bust population dynamics under starvation stress
1MACSI, University of Limerick, Limerick, Ireland; OCIAM, University of Oxford, Oxford, UK.
Theoretical Population Biology
|February 16, 2018
Summary
Microbial populations can oscillate and survive extreme environments by switching to a dormant phase, explaining phenomena like plankton blooms and viral epidemics.
Area of Science:
- Microbiology
- Mathematical Biology
- Ecology
Background:
- Microbial population dynamics are influenced by nutrient availability and cell density.
- The transition to a dormant phase is a known survival strategy for microbes.
Purpose of the Study:
- To model microbial population growth with a focus on nutrient limitation and dormancy.
- To explain self-sustained oscillations and long-term survival in microbial populations.
Main Methods:
- Development of a mathematical model for microbial growth.
- Analysis of population dynamics under nutrient starvation and varying cell densities.
Main Results:
- The model predicts self-sustained oscillations in microbial populations, akin to plankton blooms.
- An increased dormant phase population buffers microbial minima, preventing unrealistic population declines.
- The model supports microbial survival in extreme environments for extended periods.
Conclusions:
- The proposed model offers a unified explanation for microbial oscillations, long-term survival, and sporadic outbreaks like viral epidemics.
- The dormant phase is crucial for population stability and resilience in fluctuating environments.
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