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Title

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

AuthorsSandulescu, Mathias; López, Cristóbal ; Hernández-García, Emilio ; Feudel, Ulrike
KeywordsPlankton
Chaotic advection
Turbulence
Upwelling
Vortex dynamics
Island wake
Primary production
Issue DateSep-2008
PublisherElsevier
CitationEcological Complexity 5, 228-237 (2008)
AbstractHydrodynamic 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.
Description10 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
URIhttp://hdl.handle.net/10261/7688
DOI10.1016/j.ecocom.2008.01.003
ISSN1476-9840
Appears in Collections:(IFISC) Artículos
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