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Modelling the hydrodynamic conditions associated with Dinophysis blooms in Galicia (NW Spain)

TitleModelling the hydrodynamic conditions associated with Dinophysis blooms in Galicia (NW Spain)
Publication TypeJournal Article
Year of Publication2016
AuthorsRuiz-Villarreal, M, García-García, LM, Cobas, M, Díaz, PA, Reguera, B
JournalHarmful Algae
Volume53
Pagination40 - 52
ISSN1568-9883
KeywordsDSP events
Abstract

Abstract The northwestern Iberian coast (Galician Rías and shelf) is frequently affected by toxic harmful algal blooms (HABs) (mainly Dinophysis spp.), leading to lengthy harvesting closures in a region where aquaculture has a strong socioeconomic impact. The project \{ASIMUTH\} (http://www.asimuth.eu) aimed to develop forecasting capabilities to warn of impending \{HABs\} along the European Atlantic coast. Simulations with the \{ROMS\} model (hydrodynamical and ecological simulations complemented with Lagrangian particle tracking simulations) of the Galician coastal circulation have been performed in the framework of the \{ASIMUTH\} project to characterize and forecast oceanographic conditions before and during \{HAB\} periods. In this work, we present the Galician \{ASIMUTH\} forecast system and demonstrate its skill in predicting \{HAB\} transport and its usefulness to provide assessment for the management of the areas affected by toxic outbreaks. Experience gained during \{DSP\} events in 2005 and 2013 is shown. We also describe the Galician pilot \{HAB\} bulletins, aimed at distributing forecasts of \{HAB\} events that might induce closures of harvesting areas or, when the areas are already closed, at giving information on forthcoming oceanographic conditions that could favour or hamper the opening of an area. Our results show that the model forecasts and the bulletins can provide early warning of the risk of Dinophysis spp. events and the risk of closures linked to the presence of \{DSP\} toxins above regulatory levels in harvesting areas.

URLhttp://www.sciencedirect.com/science/article/pii/S1568988315001766
DOI10.1016/j.hal.2015.12.003