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Hopf and steady state bifurcation analysis in a ratio-dependent predator-prey model
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.
2017 (English)In: Communications in nonlinear science & numerical simulation, ISSN 1007-5704, E-ISSN 1878-7274, Vol. 44, 52-73 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we perform spatiotemporal bifurcation analysis in a ratio-dependent predator prey model and derive explicit conditions for the existence of non-constant steady states that emerge through steady state bifurcation from related constant steady states. These explicit conditions are numerically verified in details and further compared to those conditions ensuring Turing instability. We find that (1) Turing domain is identical to the parametric domain where there exists only steady state bifurcation, which implies that Turing patterns are stable non-constant steady states, but the opposite is not necessarily true; (2) In non-Turing domain, steady state bifurcation and Hopf bifurcation act in concert to determine the emergent spatial patterns, that is, non-constant steady state emerges through steady state bifurcation but it may be unstable if the destabilising effect of Hopf bifurcation counteracts the stabilising effect of diffusion, leading to non-stationary spatial patterns; (3) Coupling diffusion into an ODE model can significantly enrich population dynamics by inducing alternative non-constant steady states (four different states are observed, two stable and two unstable), in particular when diffusion interacts with different types of bifurcation; (4) Diffusion can promote species coexistence by saving species which otherwise goes to extinction in the absence of diffusion.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 44, 52-73 p.
Keyword [en]
Prey-predator model, Turing instability, Pattern formation, Spatiotemporal bifurcation, Non-constant eady state
National Category
Mathematics Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-130075DOI: 10.1016/j.cnsns.2016.07.027ISI: 000386744400005OAI: oai:DiVA.org:umu-130075DiVA: diva2:1065018
Available from: 2017-01-13 Created: 2017-01-11 Last updated: 2017-01-13Bibliographically approved

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Zhang, Lai
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf