Sediment quality in a metal-contaminated tropical bay assessed with a multiple lines of evidence approach

Autor: Abilio Soares-Gomes, Sarah K. Rodrigues, Ana Paula de Castro Rodrigues, Denis Moledo de Souza Abessa, Wilson Machado, Ricardo Erthal Santelli, Aline Soares Freire, Carolina B. Freitas
Přispěvatelé: Universidade Federal do Rio de Janeiro (UFRJ), Universidade Federal Fluminense (UFF), Universidade Estadual Paulista (Unesp)
Rok vydání: 2017
Předmět:
Zdroj: Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 0269-7491
Popis: Made available in DSpace on 2018-11-26T17:35:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-09-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) A sediment quality assessment was performed near to the main industrial source of metal contamination in Sepetiba Bay, Brazil, which represents one of the worst cases of trace metal contamination reported for coastal areas. Acute and chronic toxicity tests, benthic fauna community analysis and metal bioavailability evaluations were applied to identify risks to the benthic community. Significant amphipod mortality was observed close to the major pollution source and lower copepod fertility was observed for all stations. Equilibrium-partitioning and biotic-ligand models to predict pore water metal toxicity, which were based on acid-volatile sulfide (AVS) and organic carbon fraction (f(oc)) normalization approaches, suggested that metals are not likely to be available in sediment pore water. However, Cd, Pb and Zn concentrations were mainly (>50%) weakly bound to sediments, suggesting high potential bioavailability. Linking the chemical results with ecotoxicological responses, we observed that sediment feeding organisms presented acute and chronic toxicities that were positively correlated to the metal concentrations in the sediments. Additionally, benthic fauna composition was dominated by tolerant species, revealing a trophic structure response to environmental contamination. These results reinforce the necessity of a multiple lines of evidence approach to establish sediment quality and to support environmental management decisions that are based on observed effects and potential extrapolation scenarios into, the future. (C) 2017 Elsevier Ltd. All rights reserved. Univ Fed Rio de Janeiro, Ctr Tecnol, Dept Engn Naval & Ocean, Lab Sedimentos Coes LDSC, Bloco 1,Sala 1-100,Cidade Univ, BR-21945970 Rio De Janeiro, RJ, Brazil Univ Fed Fluminense, Dept Geoquim, Programa Posgrad Geoquim, Outeiro Sao Joao Baptista S-N, BR-24020141 Niteroi, RJ, Brazil Univ Estadual Paulista, Campus Litoral Paul, BR-11330900 Sao Vicente, SP, Brazil Univ Fed Fluminense, Inst Biol, Dept Biol Marinha, Outeiro Sao Joao Baptista S-N, BR-24020141 Niteroi, RJ, Brazil Univ Fed Rio de Janeiro, Inst Quim, Ctr Tecnol, Dept Quim Analit, Cidade Univ, BR-21941909 Rio De Janeiro, RJ, Brazil Univ Estadual Paulista, Campus Litoral Paul, BR-11330900 Sao Vicente, SP, Brazil
Databáze: OpenAIRE