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Distribution, toxicity and bioaccumulation of trace metals in environmental matrices of an estuary in a protected area.
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- Author(s): de Freitas Santos da Silva, Anna Carolina; de Santana, Carolina Oliveira; dos Santos Vergilio, Cristiane; de Jesus, Taíse Bomfim
- Source:
Marine Pollution Bulletin; Jun2023, Vol. 191, pN.PAG-N.PAG, 1p- Subject Terms:
- Source:
- Additional Information
- Subject Terms:
- Abstract: Mangroves are productive ecosystems that are highly threatened by anthropogenic activities. We investigated the environmental quality of the Serinhaém river estuary located in a legally protected area. Through chemical analysis of sediments and tissues of Cardisoma guanhumi , in addition to bioassays with elutriate involving Nitokra sp. and Thalassiosira pseudonana , we determined the contamination status and risk factors related to trace metals in the estuary. For the sediment, the concentrations of Cr and Ni were above the limit established by CONAMA n° 454/2012 in the "City" site, and Cr above the TEL in all sampling sites. Ecotoxicological tests showed high toxicity in samples from "City" and "Tributary". The elements Cr, Mn, Ni and Zn were also higher in crabs from these sites. Cr levels exceeded the Brazilian limit for food consumption. The bioaccumulation factor was not significant. However, the overall analysis proved that this estuary is increasingly impacted by anthropogenic pressure. • The estuary is located in a protected area that was hit by the biggest oil spill accident in the history of Brazil. • The Cr contents were above the TEL for all sample points, indicating a moderate contamination in the sediment. • The bioassay with elutriate showed high toxicity with growth inhibition of Thalassiosira pseudonana. • There was less Nitokra sp spawning after exposure to elutriate from the point close to the urban area. • The Cr content in tissues of Cardisoma guanhumi is above that established for human consumption by Brazilian legislation. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Marine Pollution Bulletin is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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