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dc.contributor.authorBrauko, KMen
dc.contributor.authorCabral, Aen
dc.contributor.authorCosta, NVen
dc.contributor.authorHayden, Jen
dc.contributor.authorDias, CEPen
dc.contributor.authorLeite, ESen
dc.contributor.authorWestphal, RDen
dc.contributor.authorMueller, CMen
dc.contributor.authorHall-Spencer, JMen
dc.contributor.authorRodrigues, RRen
dc.contributor.authorRörig, LRen
dc.contributor.authorPagliosa, PRen
dc.contributor.authorFonseca, ALen
dc.contributor.authorAlarcon, OEen
dc.contributor.authorHorta, PAen

<jats:p>Marine heatwaves (MHWs) are a major concern worldwide due to their increasing impacts in recent years, and these extreme events may trigger deoxygenation of coastal waters affected by sewage and eutrophication. Here we investigate the combined effects of MHWs and nutrient enrichment on the water quality and biodiversity of the Bay of Santa Catarina Island (Brazil). We used historical (1994–2020) sea surface temperature data from satellites and <jats:italic>in situ</jats:italic> physical, chemical and biological parameters to assess temporal trends. Oxygen levels have been decreasing whilst phosphorus levels have been increasing in the bay. During the austral summer of 2020 a regional sea surface heatwave was detected by satellite, lasting for 9 days and coinciding with our research cruise. During this period, seawater temperatures reached 29.8°C and anoxia was detected for the first time in the bay. A decrease in macrobenthic and phytoplankton community richness correlated with decreases in oxygen both through time and towards more urbanized areas. Overall, poor wastewater treatment is a key stressor that combined with MHWs to degrade coastal waters. Mitigation strategies are needed to minimize the impact of MHWs, including improved sewage treatment, restoration and conservation of wetlands and the use of nature-based technologies to promote coastal ecosystem recovery.</jats:p>

dc.publisherFrontiers Mediaen
dc.titleMarine Heatwaves, Sewage and Eutrophication Combine to Trigger Deoxygenation and Biodiversity Loss: A SW Atlantic Case Studyen
dc.typeJournal Article
plymouth.journalFrontiers in Marine Scienceen
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/PRIMaRE Publications
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.rights.embargoperiodNot knownen
rioxxterms.typeJournal Article/Reviewen

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