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Integrating multiple lines of evidence of sediment quality in a tropical bay (Guanabara Bay, Brazil)

2019; Elsevier BV; Volume: 146; Linguagem: Inglês

10.1016/j.marpolbul.2019.07.051

1879-3363

Bruno Galvão de Campos, Lucas Buruaem Moreira, Guacira de Figueiredo Eufrasio Pauly, Ana Carolina Feitosa Cruz, Christiane do Nascimento Monte, Lílian Irene Dias da Silva, Ana Paula de Castro Rodrigues, Wilson Machado, Denis Moledo de Souza Abessa,

Water Quality and Pollution Assessment

The present study evaluated the ecological risk of metal contamination in sediments of Guanabara Bay (GB) by combining multiple lines of evidence (LOEs). Chemical analysis and a set of whole-sediment toxicity assays were conducted with Tiburonella viscana, Kalliapseudes schubartii, Anomalocardia flexuosa, and Nitocra sp. Results were integrated by multivariate analysis and qualitative methods. Additionally, a whole-sediment Toxicity Identification Evaluation technique (TIE) was applied to identify the chemical groups responsible for the effects. Sediments from harbor and industrial areas exhibited toxicity linked to moderate to high concentrations of Zn, Pb, Cu and Cr. The TIE technique confirmed such effects, but it also indicates the contribution of ammonia and organic compounds to the observed toxicity. Our results demonstrate that the combination of multiple LOEs improves the effectiveness of environmental risk assessment of chemical stressors and management of coastal ecosystems in tropical regions.