Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/11198 |
Resumo: | Cyanobacteria 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. |
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Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal WatersCyanobacteria bloomsFresh-waterHarmful CyanobacteriaToxic CyanobacteriaRisk-assessmentLiver-failureAlgal bloomHealth-riskRising Co2MicrocystinCyanobacteria 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.project 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]MDPISapientiaChurro, CatarinaAzevedo, JoanaVasconcelos, VitorDuarte Silva, Alexandra2018-12-07T14:52:45Z2017-122017-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/11198eng2072-665110.3390/toxins9120391info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:22:57Zoai:sapientia.ualg.pt:10400.1/11198Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:02:42.514378Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
title |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
spellingShingle |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters Churro, Catarina Cyanobacteria blooms Fresh-water Harmful Cyanobacteria Toxic Cyanobacteria Risk-assessment Liver-failure Algal bloom Health-risk Rising Co2 Microcystin |
title_short |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
title_full |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
title_fullStr |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
title_full_unstemmed |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
title_sort |
Detection of a Planktothrix agardhii Bloom in Portuguese Marine Coastal Waters |
author |
Churro, Catarina |
author_facet |
Churro, Catarina Azevedo, Joana Vasconcelos, Vitor Duarte Silva, Alexandra |
author_role |
author |
author2 |
Azevedo, Joana Vasconcelos, Vitor Duarte Silva, Alexandra |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Churro, Catarina Azevedo, Joana Vasconcelos, Vitor Duarte Silva, Alexandra |
dc.subject.por.fl_str_mv |
Cyanobacteria blooms Fresh-water Harmful Cyanobacteria Toxic Cyanobacteria Risk-assessment Liver-failure Algal bloom Health-risk Rising Co2 Microcystin |
topic |
Cyanobacteria blooms Fresh-water Harmful Cyanobacteria Toxic Cyanobacteria Risk-assessment Liver-failure Algal bloom Health-risk Rising Co2 Microcystin |
description |
Cyanobacteria 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. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12 2017-12-01T00:00:00Z 2018-12-07T14:52:45Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/11198 |
url |
http://hdl.handle.net/10400.1/11198 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2072-6651 10.3390/toxins9120391 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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