Environmental evaluation of the Reloncaví estuary in southern Chile based on lipophilic shellfish toxins as related to harmful algal blooms*

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datacite.alternateIdentifier.citationSCIENCE OF THE TOTAL ENVIRONMENT,Vol.928,2024
datacite.alternateIdentifier.doi10.1016/j.scitotenv.2024.172374
datacite.creatorFuenzalida, Gonzalo
datacite.creatorYarimizu, Kyoko
datacite.creatorNorambuena, Luis
datacite.creatorFujiyoshi, So
datacite.creatorPerera, Ishara Uhanie
datacite.creatorRilling, Joaquin Ignacio
datacite.creatorCampos, Marco
datacite.creatorRuiz Gil, Tay
datacite.creatorVilugron, Jonnathan
datacite.creatorSandoval Sanhueza, Alondra
datacite.creatorOrtiz, Mario
datacite.creatorEspinoza Gonzalez, Oscar
datacite.creatorGuzman, Leonardo
datacite.creatorAcuna, Jacqueline J.
datacite.creatorJorquera, Milko A.
datacite.creatorMaruyama, Fumito
datacite.date2024
datacite.subject.englishAquaculture
datacite.subject.englishToxin monitoring
datacite.subject.englishEnvironmental toxicology
datacite.subject.englishReloncavi
datacite.subject.englishAlgal toxins
datacite.titleEnvironmental evaluation of the Reloncaví estuary in southern Chile based on lipophilic shellfish toxins as related to harmful algal blooms*
dc.date.accessioned2024-09-10T18:47:14Z
dc.date.available2024-09-10T18:47:14Z
dc.description.abstractThe Reloncavi estuary in southern Chile is famous for its aquaculture. However, recurring harmful algal blooms have adversely affected mussel production. Therefore, regular monitoring of algal toxins is urgently needed to better understand the contamination status of the estuary. In this study, we quantified 15 types of lipophilic shellfish toxins in Metri Bay in the Reloncavi estuary on a biweekly basis for 4 years. We identified algal species using microscopy and metabarcoding analysis. We also measured water temperature, salinity, chlorophyll-a, and dissolved oxygen to determine the potential relationships of these parameters with algal toxin production. Our results revealed the presence of a trace amount of pectenotoxin and the causal phytoplankton Dinophysis, as well as yessotoxin and the causal phytoplankton Protoceratium. Statistical analysis indicated that fluctuations in water temperature affected the detection of these toxins. Additionally, metabarcoding analysis detected the highly toxic phytoplankton Alexandrium spp. in some samples. Although our results suggest that the level of lipophilic shellfish toxins in Metri Bay during the study period was insignificantly low using our current LC-MS method, the confirmed presence of highly toxic algae in Metri Bay raises concerns, given that favorable environmental conditions could cause blooms.
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6013
dc.language.isoen
dc.publisherELSEVIER
dc.sourceSCIENCE OF THE TOTAL ENVIRONMENT
oaire.resourceTypeArticle
uct.indizacionSCI
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