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Toward predicting Dinophysis blooms off NW Iberia: a decade of events

2016-07Journal article Open access
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dc.contributor.authorMoita, Maria Teresa
dc.contributor.authorPazos, Yolanda
dc.contributor.authorRocha, Carlos
dc.contributor.authorNolasco, Rita
dc.contributor.authorOliveira, Paulo B.
dc.date.accessioned2017-04-07T15:56:59Z
dc.date.available2017-04-07T15:56:59Z
dc.date.issued2016-07
dc.description.abstractDinophysis acuminata and Dinophysis acuta are recurrent species off NW Iberia but their outbreaks occur under different conditions. A decade (2004-2013) of weekly data for each species at two sentinel stations located at the entrance of Rias de Aveiro-AV (NW Portugal, 40 degrees 38.6' N) and Pontevedra-PO (Galicia, Spain, 42 degrees 21.5' N), were used to investigate the regional synchronism and mesoscale differences related to species detection, bloom (>200 cells L-1) initiation and development. Results highlight the high interannual variability of bloom events and summarize the associated meteorological/oceanographic conditions. D. acuta blooms were observed in 2004-2008 and 2013, and the species highest maxima at AV occurred after the highest maxima of its prey Mesodinium, with a time-lag of 2-3 weeks. D. acuminate blooms were observed every year at both stations. The cell concentration time series shows that the blooms generally present a sequence starting in March with D. acuminata in PO and three weeks later in AV, followed by D. acuta that starts at AV and three months later in PO. Exceptionally, D. acuminate blooms occurred earlier at AV than PO, namely in high spring upwelling (2007) or river runoff (2010) years. A four-year gap (2009-2012) of D. acuta blooms occurred after an anomalous 2008 autumn with intense upwelling which is interpreted as the result of an equatorward displacement of the population core. Numerical model solutions are used to analyze monthly alongshore current anomalies and test transport hypotheses for selected events. The results show a strong interannual variability in the poleward/equatorward currents associated with changes in upwelling forcing winds, the advection of D. acute blooms from AV to PO and the possibility that D. acuminata blooms at AV might result from inocula advected southward from PO. However, the sensitivity of the results to vertical position of the lagrangian tracers call for more studies on species distribution at the various bloom stages. (C) 2015 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.hal.2015.12.002
dc.identifier.issn1568-9883
dc.identifier.urihttp://hdl.handle.net/10400.1/9581
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationApplied simulations and Integrated modeling for the understanding of toxic and harmful algal blooms
dc.relation.isbasedonWOS:000376699900003
dc.titleToward predicting Dinophysis blooms off NW Iberia: a decade of events
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleApplied simulations and Integrated modeling for the understanding of toxic and harmful algal blooms
oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/261860/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F100348%2F2008/PT
oaire.citation.endPage32
oaire.citation.startPage17
oaire.citation.titleHarmful Algae
oaire.citation.volume53
oaire.fundingStreamFP7
oaire.fundingStream3599-PPCDT
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isProjectOfPublication98ee00a0-6170-4e30-a1c0-6d2d6ac9370b
relation.isProjectOfPublicationd7538874-a815-4cc0-a971-a11e1c81cd5f
relation.isProjectOfPublication.latestForDiscovery98ee00a0-6170-4e30-a1c0-6d2d6ac9370b

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