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Choueri RB, de Souza Abessa DM, de Carvalho MU, Pazini B, Zanardi-Lamardo E, Rojas LAV, de Carvalho PSM, de Andrade NVM, de Souza Santos LP, Ferraz MA, Alves AV, Castro ÍB. PAH residues and toxicity levels two years after an extensive oil spill on the northeast Brazilian coast. Mar Pollut Bull 2024; 200:116063. [PMID: 38278019 DOI: 10.1016/j.marpolbul.2024.116063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/22/2023] [Accepted: 01/18/2024] [Indexed: 01/28/2024]
Abstract
The most extensive oil spill ever recorded in tropical oceans occurred between August 2019 and March 2020, affecting approximately 3000 km of the Brazilian coast. This study assessed the chemical contamination and toxicity of sediments collected from affected reef areas during two sampling surveys conducted 17 and 24 months after the peak of oil slick inputs. Our results indicated that neither PAH levels nor measured toxicity showed a significant contribution from the spilled oil, with concentrations and biological effects indistinguishable from those in unaffected areas. Similarly, no differences were observed between seasons. Furthermore, there was no discernible relationship between sediment toxicity results and the measured PAH concentrations. Therefore, while biological responses indicated toxicity in most assessed areas, these responses are likely related to other local sources. This evidence suggests a natural oil attenuation process contributing to local environmental recovery. Nonetheless, further investigation is needed for other areas affected by oil spills.
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Affiliation(s)
| | - Denis Moledo de Souza Abessa
- Campus do Litoral Paulista, Universidade Estadual Paulista Júlio de Mesquita Filho - Unesp, São Vicente, SP, Brazil
| | - Maysa Ueda de Carvalho
- Campus do Litoral Paulista, Universidade Estadual Paulista Júlio de Mesquita Filho - Unesp, São Vicente, SP, Brazil
| | - Bianca Pazini
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, SP, Brazil
| | - Eliete Zanardi-Lamardo
- Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR) - Departamento de Oceanografia, Centro de Tecnologia e Geociências (CTG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | - Lino Angel Valcárcel Rojas
- Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR) - Departamento de Oceanografia, Centro de Tecnologia e Geociências (CTG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | - Paulo Sérgio Martins de Carvalho
- Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR) - Departamento de Oceanografia, Centro de Tecnologia e Geociências (CTG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | - Nycolle Virgínia Maux de Andrade
- Laboratório de Cultivo e Ecotoxicologia (LACE) - Departamento de Oceanografia, Centro de Tecnologia e Geociências (CTG), Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Lília Pereira de Souza Santos
- Laboratório de Cultivo e Ecotoxicologia (LACE) - Departamento de Oceanografia, Centro de Tecnologia e Geociências (CTG), Universidade Federal de Pernambuco, Recife, PE, Brazil
| | | | - Aline Vecchio Alves
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, SP, Brazil
| | - Ítalo Braga Castro
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, SP, Brazil.
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