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Copepod diffusion within multifractal phytoplankton fields
Marguerit, C.; Schertzer, D.; Schmitt, F.; Lovejoy, S. (1998). Copepod diffusion within multifractal phytoplankton fields, in: Delhez, E.J.M. (Ed.) Modelling hydrodynamically dominated manne ecosystems. Journal of Marine Systems, 16(Special Issue 1-2): pp. 69-83. dx.doi.org/10.1016/S0924-7963(97)00100-0
In: Delhez, E.J.M. (Ed.) (1998). Modelling hydrodynamically dominated manne ecosystems. Journal of Marine Systems, 16(Special Issue 1-2). Elsevier: Amsterdam. 1-190 pp., more
In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 237777 [ OMA ]
Document type: Conference paper

Keyword
    Marine

Authors  Top 
  • Marguerit, C.
  • Schertzer, D.
  • Schmitt, F., more
  • Lovejoy, S.

Abstract
    Oceanic turbulence has been considered for a while as one of the main sources of the heterogeneity of the phytoplankton field over a wide range of scales. However, it is only recently that the intermittency of turbulence has been taken into account, although it is rather indispensable in the explanation of the observed patchiness of the plankton field. In order to improve the understanding and characterization of the diffusion of copepods within an heterogeneous phytoplankton field, we developed a model based on particle diffusion in a multifractal field. After discussing this model with some detail, we used it and the corresponding numerical simulations in order to investigate the fundamental question: does the strong heterogeneity of the phytoplankton generate a anomalous diffusion of the copepods? Although a positive answer is obtained in a rather straightforward manner for a one-dimensional multifractal field of phytoplankton concentration, the answer is rather more involved for a greater (topological) dimension of the field, contrary to some previous claims.

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