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Coupled phase-amplitude dynamics in heterogeneous metacommunities
Russell Milne1, Frederic Guichard2
1Department of Applied Mathematics, University of Waterloo, Canada.
Journal of Theoretical Biology
|March 23, 2021
Summary
Spatial synchrony in population dynamics is key for regional stability. This study shows frequency modulation, driven by dispersal and habitat differences, enhances stability in complex ecological systems.
Area of Science:
- Ecology
- Population Dynamics
- Metacommunity Ecology
Background:
- Spatial synchrony of population fluctuations aids regional stability prediction.
- Ecological theories struggle with complex time series, varying frequencies, and amplitudes.
- Environmental fluctuations and dispersal influence population dynamics but their role in synchrony and stability in heterogeneous metacommunities needs clarification.
Purpose of the Study:
- To investigate how dispersal and habitat heterogeneity affect spatial synchrony and stability.
- To analyze the emergence of frequency modulation in heterogeneous predator-prey metacommunities.
- To understand the implications of frequency modulation for population dynamics and stability.
Main Methods:
- Utilized a heterogeneous predator-prey metacommunity model.
- Studied the response of dispersal-driven phase locking and frequency modulation.
- Examined the impact of among-patch heterogeneity in carrying capacity.
Main Results:
- Frequency modulation was observed at intermediate dispersal and habitat heterogeneity.
- Frequency modulation can arise in both autonomously oscillating and forced local communities.
- Frequency modulation leads to temporal variation in population amplitudes, enhancing stability.
Conclusions:
- Spatial synchrony should be viewed as a non-stationary phenomenon.
- Frequency modulation plays a crucial role in promoting local and regional stability.
- Findings have implications for interpreting spatial synchrony in natural and experimental systems.
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