Lagrangian modelling of plankton motion: From deceptively simple random walks to Fokker–Planck and back again

摘要: Abstract The movement of plankton, either by turbulent mixing or their own inherent motility, can be simulated in a Lagrangian framework as random walk. Validation walk simulations is essential. There continuum mathematically valid stochastic integration schemes upon which depend, each lead to radically different macro-scale dynamics expressed corresponding Fokker–Planck equations. In addition, diffusivity not unique parameter describing and its equation. Spatially varying translation speed turn frequency have effects on population distributions. requires extra information the form well-mixed condition for physical diffusion, detailed sensing ability, internal state modulation swimming response plankton motility.