García-García, L. (Luz)

González-Nuevo, G. (Gonzalo)

Reguera, B. (Beatriz)

Rodríguez, F. (Francisco)

Ruiz-Villarreal, M. (Manuel)

English

Repositorio Institucional Digital del IEO

Early warning forecasts of harmful Dinophysis blooms in Galicia (NW Spain)Manuel Ruiz-Villarreal, Luz García-García, Gonzalo González Nuevo, Francisco Rodríguez and Beatriz RegueraInstituto Español de Oceanografía, IEO, CSICAnnual Production (tons)Number of closing days / yearMUSSEL PRODUCTION BIOTOXIN CLOSURESCULTIVATED MUSSEL IN GALICIAINTECMAR report on closures of mussel polygons 1998-2020, May 202144 harvesting polygons3387 mussel raftsWeekly HAB monitoringRía de PontevedraDinophysis acuminata concentrations in weekly monitoring stations (Data from INTECMAR, Xunta de Galicia)2013Can a forecast model help us understand and predict the observed variability in Dinophysis? Spring-summer 2013: Temporal evolution of D. Acuminata concentrations and closures Ría de PontevedraSpring bloomUpwellingDownwellingSpring 2013: variability in D. acuminata vs. variability in oceanographic conditions Model surface current and temperatureSatellite SSTDiaz et al. 2017, PiOUpwelling pulseWater renewal in the riasUpwellingDownwellingSummer 2013: D. acuminata vs. variability in oceanographic conditions Mesodinimum spp. bloom (upwelling) followed by conditions favorable for D. acuminata (relaxation, retention) Variability in oceanographic conditions described in detail by the model (upwelling, relaxation, retention, advection, coupling with tides)Dinophysis acutaRia de Pontevedra 1985-2015Diaz et al. 2016, Harmful AlgaeDinophysis acuminataRia de Pontevedra 1985-2012 Diaz et al. 2013, Marine DrugsMonth 2005 100 m Northwards transport of D. acuta in autumn 2005Dinophysis acuta weekly concentrationModel Northwards velocityRuiz-Villarreal et al., Harmful Algae, 2016Escalera et al, Harmful Algae, 2009SSTUpwellingDownwellingAutumn 2013: High D. acuta (and D.acuminata) concentrations (prolonged closures)PortoVianaAutumn 2013: Dynophysis acuta and Along-shore transport 100mRuiz-Villarreal et al. 2016 Harmful AlgaeNorthwards shelf current During autumn D. acuta blooms, forecasts of along and across-shore transport are a tool for predicting the risk of closures of harvesting areasAnnual Production (tons)Number of closing days / yearMUSSEL PRODUCTION BIOTOXIN CLOSURESCULTIVATED MUSSEL IN GALICIAD. acuminataD. acutaDSPElements of the Galician HAB Early Warning BulletinIn situ Data ProcessingClient Server Services Dinophysis acuminata September 2020Dinophysis acuta September 2020Figure 7: Screenshot of the "state of the zones" web service.1 2 3 4 5 6 7 8 9Figure 6: Screenshot of the zone data summary web service1 2 3 4 5 6 7 8Figure 5: Screenshot of the hab species data summary web service. 1 2 3 4 5 6 7 8Figure 3: Screen caption of the time series plot service. 1 2 3 4 5 67ConclusionsLagrangian-hydrodynamical coupled simulations provide predictions of favorable conditions of along-shore advection, exchanges between rıás or flows in and out of the rıás, and this is useful for characterising Dinophysis spp. transport. HAB alert and evaluation of the forecast rely on the measurements of HAB monitoring systems. In areas like Galicia and N Portugal where transnational alongshore transport can be relevant, transboundary exchange of information between different HAB monitoring systems is crucial.The availability of routine forecasts is paramount for an early warning system, but differences and limitations of the hydrodynamic model configurations strongly affect the simulated transport. Differences in resolution, forcing and simulation domain cause differences in the predicted transport of HABsStandard services for disseminating in situ and model data efficient for automatization of production of forecasts and data exchange 

Early warning forecasts of harmful Dinophysis blooms in Galicia (NW Spain)

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