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Dynamical systems analysis of a five-dimensional trophic food web model in the Southern Oceans


Hadley, SA and Forbes, LK, Dynamical systems analysis of a five-dimensional trophic food web model in the Southern Oceans, Journal of Applied Mathematics, 2009 Article 575047. ISSN 1110-757X (2009) [Refereed Article]


Copyright Statement

Copyright 2009 S.A. Hadley and L.K. Forbes Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0)

DOI: doi:10.1155/2009/575047


A theoretical model developed by Stone describing a three-level trophic system in the Ocean is analysed. The system consists of two distinct predator-prey networks, linked by competition for nutrients at the lowest level. There is also an interaction at the level of the two preys, in the sense that the presence of one is advantageous to the other when nutrients are low. It is shown that spontaneous oscillations in population numbers are possible, and that they result from a Hopf bifurcation. The limit cycles are analysed using Floquet theory and are found to change from stable to unstable as a solution branch is traversed.

Item Details

Item Type:Refereed Article
Keywords:dynamical Systems, NPDZ, food web
Research Division:Mathematical Sciences
Research Group:Applied mathematics
Research Field:Biological mathematics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Forbes, LK (Professor Larry Forbes)
ID Code:114270
Year Published:2009
Web of Science® Times Cited:5
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-02-09
Last Modified:2017-11-21
Downloads:120 View Download Statistics

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