A spatial theory for emergent multiple predator-prey interactions in food webs

Area of Science:

• Ecology
• Theoretical Ecology
• Spatial Ecology

Background:

• Predator-prey interactions are fundamentally spatial, involving animal movement across landscapes for foraging and predator avoidance.
• Integrating spatial processes into food web theory is essential for understanding emergent multiple predator effects on prey.

Purpose of the Study:

• To develop a spatial modeling approach for examining emergent multiple predator effects on prey within landscapes.
• To address the uncertainty of whether spatial contingency principles hold in dynamical systems by formulating dynamical systems models.

Main Methods:

• Utilized the habitat domain concept, derived from empirical synthesis of spatial movement and interaction studies.
• Formulated dynamical systems models guided by habitat domain principles to examine long-term spatial dynamics.
• Employed classical niche concepts and resource utilization distributions to describe habitat domains and species interactions.

Main Results:

• Analytical results align with empirical synthesis, providing a theoretical framework for multiple predator effects.
• Demonstrated multiple predator effects independent of small spatial or temporal scales typical of mesocosm experiments.
• Bridged the gap between empirical experiments and long-term ecological dynamics in natural systems.

Conclusions:

• Spatial modeling provides a robust framework for understanding complex predator-prey dynamics in landscapes.
• The study validates the application of spatial contingency principles in long-term dynamical systems.
• Findings contribute to a more comprehensive understanding of ecological interactions in natural environments.