Chemical contamination affecting filter-feeding bivalves in no-take marine protected areas from Brazil.

Autor: Nunes BZ; Programa de Pós-graduação em Oceanologia (PPGO), Universidade Federal do Rio Grande (IO-FURG), Rio Grande, Brazil., Ribeiro VV; Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, Brazil., Garcia Y; Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, Brazil., Lourenço RA; Instituto Oceanográfico, Universidade de São Paulo (IO-USP), São Paulo, Brazil., Castro ÍB; Programa de Pós-graduação em Oceanologia (PPGO), Universidade Federal do Rio Grande (IO-FURG), Rio Grande, Brazil; Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, Brazil. Electronic address: ibcastro@unifesp.br.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Jun; Vol. 360, pp. 121102. Date of Electronic Publication: 2024 May 17.
DOI: 10.1016/j.jenvman.2024.121102
Abstrakt: Marine protected areas (MPAs) are zones geographically delimited under pre-defined management goals, seeking to reduce anthropogenic threats to biodiversity. Despite this, in recent years reports of MPAs affected by chemical contamination has grown. Therefore, this study addresses this critical issue assessing legacy and current chemical contamination in filter-feeder bivalves obtained in very restrictive no-take MPAs from Brazil. The detected pollutants encompass polycyclic aromatic hydrocarbons (PAHs), linear alkylbenzenes (LABs), and persistent organic pollutants (POPs) like dichlorodiphenyltrichloroethane (DDTs) and polychlorinated biphenyls (PCBs). Despite protective measures, bivalves from nine MPAs exhibited high LABs (13.2-1139.0 ng g -1 ) and DDTs levels (0.1-62.3 ng g -1 ). PAHs were present in low concentrations (3.1-29.03 ng g -1 ), as PCBs (0.7-6.4 ng g -1 ), hexachlorobenzene (0.1-0.2 ng g -1 ), and Mirex (0.1-0.3 ng g -1 ). Regardless of the sentinel species, MPAs and management categories, similar accumulation patterns were observed for LABs, DDTs, PAHs, and PCBs. Based on the limits proposed by Oslo Paris Commission, the measured levels of PAHs, PCBs and were below the environmental assessment criteria. Such findings indicate the no biological effects are expected to occur. However, they are higher considering background conditions typically measured in remote or pristine areas and potential simultaneous exposure. Such findings indicate an influence of anthropogenic sources, emphasizing the urgency for monitoring programs guiding strategic management efforts to safeguard these areas.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: