Dynamical Systems Analysis of a Five‐Dimensional Trophic Food Web Model in the Southern Oceans | Zendy

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Dynamical Systems Analysis of a Five‐Dimensional Trophic Food Web Model in the Southern Oceans

Author(s) -

Scott Hadley,

Lawrence K. Forbes

Publication year - 2009

Publication title -

journal of applied mathematics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.307

H-Index - 43

eISSN - 1687-0042

pISSN - 1110-757X

DOI - 10.1155/2009/575047

Subject(s) - trophic level , hopf bifurcation , floquet theory , food web , predation , limit (mathematics) , competition (biology) , population , functional response , mathematics , environmental science , nutrient , bifurcation , predator , ecology , biology , physics , mathematical analysis , demography , quantum mechanics , nonlinear system , sociology

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

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