Impact of predator dormancy on prey-predator dynamics

Area of Science:

• Ecology
• Population Dynamics
• Freshwater Ecosystems

Background:

• Predator dormancy is a survival strategy impacting population dynamics.
• Phytoplankton-zooplankton interactions are crucial in freshwater ecosystems.
• Understanding ecological stability requires modeling complex population behaviors.

Purpose of the Study:

• To investigate the impact of predator dormancy on phytoplankton-zooplankton population dynamics.
• To identify and characterize novel oscillation patterns in ecological models.
• To explore the relationship between carrying capacity and population stability.

Main Methods:

• Development of a simple mathematical model incorporating predator dormancy.
• Analysis of population dynamics under varying carrying capacities.
• Identification and classification of different oscillation types (chaos-mediated and nonchaos-mediated).

Main Results:

• Discovery of extensive nonchaos-mediated mixed-mode oscillations preceding chaotic behavior.
• Nonchaos-mediated cascades exhibit spike-adding, while chaos-mediated cascades show spike-doubling.
• Identification of stable, large nonchaos-mediated phases even at low carrying capacities.

Conclusions:

• Predator dormancy introduces significant non-chaotic population dynamics in freshwater ecosystems.
• These novel non-chaotic phases contribute to ecological stability.
• The findings expand our understanding of complex population dynamics and their control parameters.