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Open Access item Biological activity in the wake of an island close to a coastal upwelling

Authors:Sandulescu, Mathias
López, Cristóbal
Hernández-García, Emilio
Feudel, Ulrike
Keywords:Plankton, Chaotic advection, Turbulence, Upwelling, Vortex dynamics, Island wake, Primary production
Issue Date:Sep-2008
Citation:Ecological Complexity 5, 228-237 (2008)
Abstract:Hydrodynamic forcing plays an important role in shaping the dynamics of marine organisms, in particular of plankton. In this work we study the planktonic biological activity in the wake of an island which is close to an upwelling region. Our research is based on numerical analysis of a kinematic flow mimicking the hydrodynamics in the wake, coupled to a three-component plankton model. Depending on model parameters different phenomena are described: a) The lack of transport of nutrients and plankton across the wake, so that the influence of upwelling on primary production on the other side of the wake is blocked. b) For sufficiently high vorticity, the role of the wake in facilitating this transport and leading to an enhancement of primary production. Finally c) we show that under certain conditions the interplay between wake structures and biological growth leads to plankton blooms inside mesoscale hydrodynamic vortices that act as incubators of primary production.
Description:10 pages (final published version).-- Pre-print available at: http://arxiv.org/abs/0802.3532 (42 pages, 9 figures).-- Published online 10 March 2008.
Publisher version (URL):http://dx.doi.org/10.1016/j.ecocom.2008.01.003
Appears in Collections:(IFISC) Artículos

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