Stirring effects in models of oceanic plankton populations

Neufeld, Zoltan (2012) Stirring effects in models of oceanic plankton populations. Chaos, 22 3: 037102.1-037102.9. doi:10.1063/1.4751329


Author Neufeld, Zoltan
Title Stirring effects in models of oceanic plankton populations
Journal name Chaos   Check publisher's open access policy
ISSN 1054-1500
1089-7682
Publication date 2012-09
Sub-type Article (original research)
DOI 10.1063/1.4751329
Volume 22
Issue 3
Start page 037102.1
End page 037102.9
Total pages 9
Collection year 2013
Language eng
Abstract We present an overview and extend previous results on the effects of large scale oceanic transport processes on plankton population dynamics, considering different types of ecosystem models. We find that increasing stirring rate in an environment where the carrying capacity is non-uniformly distributed leads to an overall decrease of the effective carrying capacity of the system. This may lead to sharp regime shifts induced by stirring in systems with multiple steady states. In prey-predator type systems, stirring leads to resonant response of the population dynamics to fluctuations enhancing the spatial variability-patchiness-in a certain range of stirring rates. Oscillatory population models produce strongly heterogeneous patchy distribution of plankton blooms when the stirring is weak, while strong stirring may either synchronise the oscillatory dynamics, when the inhomogeneity is relatively weak, or suppress oscillations completely (oscillator death) by reducing the effective carrying capacity below the bifurcation point.
Keyword Oceanic transport
Plankton
Ecosystem models
Carrying capacity
Oscillatory population models
Stirring
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 28 September 2012. Article number 037102

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2013 Collection
 
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Created: Mon, 12 Nov 2012, 21:30:03 EST by Zoltan Neufeld on behalf of Mathematics