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A Model of the Dynamics of Plankton Patchiness

Author(s): Wolfgang Ebenhöh

Journal: Modeling, Identification and Control
ISSN 0332-7353

Volume: 1;
Issue: 2;
Start page: 69;
Date: 1980;
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Keywords: Modelling | phytoplankton | zooplankton | patchiness | simulation | ecosystem | density distribution

A mathematical model of the dynamics of plankton patchiness in the intermediate scale (1 km-10 km) was developed. Mechanisms that may be important in the creation and destruction of patches were selected and modelled. Such mechanisms are: horizontal turbulent diffusion, noise in the vertical turbulence, vertical migration of the zooplankton combined with a velocity profile and consumption of zooplankton by fish in schools. Patchiness is described by thc usc of the moments of density distributions, coherence lengths and correlations of phytoplankton and zooplankton. These parameters are investigated as functions of time and, also, for their dependence on the parameters of the patch creation mechanisms.
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