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Adaptive delayed reproduction in a 2-dimensional discrete-time competition model
1Faculty of Engineering, University of Miyazaki, Miyazaki, Japan.
Journal of Biological Dynamics
|August 17, 2023
Summary
Delayed reproduction can be adaptive in fluctuating populations, even when one species dominates another. This study shows that delayed reproduction allows species 1 to invade species 2
Area of Science:
- Mathematical Biology
- Population Dynamics
- Ecological Modeling
Background:
- Competition models are crucial for understanding species interactions.
- Reproductive delays can significantly impact population dynamics.
- Previous models often assume immediate reproduction, overlooking delay effects.
Purpose of the Study:
- To investigate the adaptive potential of delayed reproduction in a 2-species competition model.
- To determine if delayed reproduction can lead to invasion success under specific conditions.
- To analyze the role of population fluctuations in the success of delayed reproduction.
Main Methods:
- Developed a 2-dimensional discrete-time competition model of Ricker type.
- Incorporated a fraction (η) of species 1 individuals with delayed reproduction.
- Analytically examined species invasibility at boundary 2-cycles.
Main Results:
- Species 1, despite being dominated by species 2, can invade species 2's monoculture.
- This invasion success is contingent on population fluctuations.
- Species 2 cannot invade the monoculture system of species 1 under these conditions.
Conclusions:
- Delayed reproduction can be an adaptive strategy in fluctuating environments.
- This strategy can enable a subordinate species to invade a dominant competitor's niche.
- The findings highlight the importance of considering temporal dynamics in ecological models.
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