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Space race functional responses.

Henrik Sjödin1, Åke Brännström2, Göran Englund3

  • 1Department of Ecology and Environmental Science, Umeå University, 90187 Umeå, Sweden Evolution and Ecology Program, International Institute for Applied Systems Analysis, 2361 Laxenburg, Austria sjodin.h@gmail.com.

Proceedings. Biological Sciences
|January 16, 2015
PubMed
Summary
This summary is machine-generated.

Prey and predators engage in a "space race," influencing population dynamics through their movement. Prey emigration stabilizes, while predator emigration destabilizes, with habitat richness determining the winner.

Keywords:
community dynamicsdispersal behavioursfunctional responsespace race

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Area of Science:

  • Ecology
  • Theoretical Ecology
  • Population Dynamics

Background:

  • Predator-prey interactions are fundamental to community dynamics.
  • Dispersal behaviors significantly influence ecological models.
  • Existing functional responses may not fully capture density-dependent emigration.

Purpose of the Study:

  • To derive novel functional response models incorporating predator-prey emigration.
  • To link dispersal behaviors directly to community dynamics.
  • To analyze the stability effects of mutual avoidance strategies.

Main Methods:

  • Derivation of functional response models based on a "space race" assumption.
  • Modeling prey and predator emigration based on interspecific densities.
  • Analysis of stability in a Lotka-Volterra system with derived functional responses.

Main Results:

  • The derived functional response models link dispersal to community dynamics.
  • Prey emigration shows stabilizing effects, similar to DeAngelis-Beddington.
  • Predator emigration shows destabilizing effects, similar to Holling type II.

Conclusions:

  • The "space race" model provides a general framework for predator-prey interactions.
  • Habitat quality influences the outcome of the predator-prey "space race."
  • Predators may dominate in poor habitats, while prey thrive in richer environments.