Using a tiered approach based on ecotoxicological techniques to assess the ecological risks of contamination in a subtropical estuarine protected area

Autor(es)

Campos, B. G. ^[1] ; Cruz, A. C. F. ^[1] ; Buruaem, L. M. ^[1] ; Rodrigues, A. P. C. ^[2] ; Machado, W. T. V. ^[2] ; Abessa, D. M. S. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Praca Infante Dom Henrique, S-N, BR-11330900 Sao Vicente, SP - Brazil

^[2] Fluminense Fed Univ Univ Fed Fluminense UFF, Dept Geochem, BR-24020141 Niteroi, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 544, p. 564-573, FEB 15 2016.
• Citações Web of Science: 9

Resumo

This study sought to assess the ecological risks of sediments from the northern portion of an estuarine protected area (Canania-Iguape-Peruibe Protected Area - CIP-PA). The CIP-PA is located on the southern coast of Sao Paulo State, Brazil and is influenced by former mining activities along the Ribeira de Iguape River (RIR). We used a tiered approach based on multiple lines of evidence (geochemical analyses, toxicity tests, and whole sediment toxicity identification and evaluation) in order to assess environmental quality. The sediments presented a heterogeneous composition, but the samples collected close to the RIR exhibited higher concentrations of metals (Cd, Cr, Cu, Pb) and toxicity. Multivariate analysis showed that toxicity was associated with metals, mud, organic matter, and CaCO3 quantities. The whole-sediment toxicity identification evaluation approach indicated that ammonia and metals were responsible for sediment toxicity. Overall, we concluded that the sediments collected at depositional areas from the northern portion of the CIP-PA presented high levels of metals, which originated from former mining areas located in the upper RIR basin, and that this contamination had toxic effects on aquatic invertebrates. The tiered approach was useful for identifying the degradation of sediment quality and also for indicating the causes of toxicity. Because the CIP-PA is an important estuarine protected area that is ecologically at risk, large-scale measures are required to control the sources of contamination. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/15482-0 - Estabelecimento de valores de referência sítio-específicos para concentrações de contaminantes em sedimentos do litoral do Estado de São Paulo: bases científicas para a criação de uma legislação no âmbito nacional
• Beneficiário: Lucas Buruaem Moreira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/03939-3 - Estudo da qualidade dos sedimentos da foz natural do rio Ribeira de Iguape (APA marinha Litoral Sul, SP) através de ensaios ecotoxicológicos
• Beneficiário: Bruno Galvão de Campos
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica