Journal article
Lagrangian modelling of plankton motion: From deceptively simple random walks to Fokker-Planck and back again
The movement of plankton, either by turbulent mixing or their own inherent motility, can be simulated in a Lagrangian framework as a random walk. Validation of random walk simulations is essential. There is a continuum of mathematically valid stochastic integration schemes upon which random walk simulations depend, each of which lead to radically different macro-scale dynamics as expressed in their corresponding Fokker-Planck equations.
In addition, diffusivity is not a unique parameter describing a random walk and its corresponding Fokker-Planck equation. Spatially varying translation speed and turn frequency have different effects on population distributions. Validation requires extra information either in the form of the well-mixed condition for physical diffusion, or in detailed information on the sensing ability, internal state modulation and swimming response for plankton motility. (C) 2007 Elsevier B.V.
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Language: | English |
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Year: | 2008 |
Pages: | 287-299 |
ISSN: | 18791573 and 09247963 |
Types: | Journal article |
DOI: | 10.1016/j.jmarsys.2006.07.007 |
ORCIDs: | Visser, Andre |