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Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters

2017-12Journal article Open access
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dc.contributor.authorChurro, Catarina
dc.contributor.authorAzevedo, Joana
dc.contributor.authorVasconcelos, Vitor
dc.contributor.authorDuarte Silva, Alexandra
dc.date.accessioned2018-12-07T14:52:45Z
dc.date.available2018-12-07T14:52:45Z
dc.date.issued2017-12
dc.description.abstractCyanobacteria blooms are frequent in freshwaters and are responsible for water quality deterioration and human intoxication. Although, not a new phenomenon, concern exists on the increasing persistence, scale, and toxicity of these blooms. There is evidence, in recent years, of the transfer of these toxins from inland to marine waters through freshwater outflow. However, the true impact of these blooms in marine habitats has been overlooked. In the present work, we describe the detection of Planktothrix agardhii, which is a common microcystin producer, in the Portuguese marine coastal waters nearby a river outfall in an area used for shellfish harvesting and recreational activities. P. agardhii was first observed in November of 2016 in seawater samples that are in the scope of the national shellfish monitoring system. This occurrence was followed closely between November and December of 2016 by a weekly sampling of mussels and water from the sea pier and adjacent river mouth with salinity ranging from 35 to 3. High cell densities were found in the water from both sea pier and river outfall, reaching concentrations of 4,960,608 cellsL(-1) and 6810.3 x 10(6) cellsL(-1) respectively. Cultures were also established with success from the environment and microplate salinity growth assays showed that the isolates grew at salinity 10. HPLC-PDA analysis of total microcystin content in mussel tissue, water biomass, and P. agardhii cultures did not retrieve a positive result. In addition, microcystin related genes were not detected in the water nor cultures. So, the P. agardhii present in the environment was probably a non-toxic strain. This is, to our knowledge, the first report on a P. agardhii bloom reaching the sea and points to the relevance to also monitoring freshwater harmful phytoplankton and related toxins in seafood harvesting and recreational coastal areas, particularly under the influence of river plumes.
dc.description.sponsorshipproject SNMB-INOV: Innovation for a more competitive shellfish sector - Portuguese Government, Operational Program (OP), Portugal; European Union through European Structural Funds and Investment Funds (FEEI); European Maritime and Fisheries Fund (EMFF); Centre of Marine Sciences (CCMAR), University of Algarve and Interdisciplinary Centre of Marine and Environmental Research (CIIMAR) of the University of Porto [UID/Multi/04326/2013]; RD Units Strategic Plan from the Portuguese Foundation for Science and Technology (FCT) [UID/Multi/04423/2013]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.3390/toxins9120391
dc.identifier.issn2072-6651
dc.identifier.urihttp://hdl.handle.net/10400.1/11198
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCyanobacteria blooms
dc.subjectFresh-water
dc.subjectHarmful Cyanobacteria
dc.subjectToxic Cyanobacteria
dc.subjectRisk-assessment
dc.subjectLiver-failure
dc.subjectAlgal bloom
dc.subjectHealth-risk
dc.subjectRising Co2
dc.subjectMicrocystin
dc.titleDetection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04423%2F2013/PT
oaire.citation.issue12
oaire.citation.startPage391
oaire.citation.titleToxins
oaire.citation.volume9
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameDuarte Silva
person.givenNameAlexandra
person.identifier.ciencia-id0F11-2E24-DBFB
person.identifier.orcid0000-0003-0384-4447
person.identifier.ridH-8344-2012
person.identifier.scopus-author-id8518688800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscoveryc07d459b-dfba-4b02-aac3-c02c0e846ca5
relation.isProjectOfPublication868b4818-3efa-4edb-9202-c464d64fd38f
relation.isProjectOfPublication4221b63a-aaed-448f-b844-278f4c2b5ac0
relation.isProjectOfPublication.latestForDiscovery868b4818-3efa-4edb-9202-c464d64fd38f

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