Continuous dispersal in a model of predator-prey-subsidy population dynamics

Journal article

Abstract:: Spatial dispersion and clustering of populations is important for a complete understanding of ecological dynamics in many ecosystems. Motivated by an Arctic ecosystem involving foxes (predator), lemmings (prey), and seal carrion (subsidy), we extend the spatially homogeneous (island) model of predator-prey-subsidy dynamics originally proposed in [A.L. Nevai and R.A. Van Gorder. Journal of Biological Dynamics, 6:891-922, 2012] to account for dispersion of predator and prey populations throughout a twodimensional domain. Our model has qualitatively similar behaviours in large regions of parameter space to the aforementioned island model. Quantitative effects due to varying the rate of dispersal and restricting the spatial extent of the subsidy are demonstrated. We observe nontrivial clustering of the predator and prey populations due to the presence of the subsidy only in a specific subregion of the domain, which suggests a novel mechanism of spatial partitioning and pattern formation due to the presence of subsidy in only part of the region of interest.

Files:: DispersalPPS.pdf

(Preview, Accepted manuscript, pdf, 666.3KB, Terms of use)

Keywords:: predator-prey dynamics

allochthonous resource subsidy

spatial population dynamics
Pubs id:: pubs:680725
UUID:: uuid:827c8635-3503-4548-84e0-a0ea7ec26835
Local pid:: pubs:680725
Source identifiers:: 680725
Deposit date:: 2017-02-20

Copyright holder:: Elsevier
Notes:: Copyright © 2017 Elsevier B.V. This is the accepted manuscript version of the article. The final version is available online from Elsevier at: https://doi.org/10.1016/j.ecolmodel.2017.02.017

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