Sediment quality of a Ramsar site assessed by chemical and ecotoxicological approaches

Autor(es)

Araujo, G. S. ^{[1, 2]} ; Cruz, A. C. F. ^{[1, 2]} ; Gusso-Choueri, P. K. ^[2] ; Saint'Pierre, T. D. ^[3] ; Hauser-Davis, R. A. ^[4] ; Martins, C. C. ^[5] ; Abessa, D. M. S. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Oceanog, Sao Paulo, SP - Brazil

^[2] Univ Estadual Paulista, UNESP, NEPEA, Campus Litoral Paulista, Sao Vicente, SP - Brazil

^[3] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Quim, Lab Espectrometria Atom Labspectro, Rio De Janeiro - Brazil

^[4] Fundacao Oswaldo Cruz, Lab Avaliacao & Promocao Saude Ambiental, Inst Oswaldo Cruz, Rio De Janeiro - Brazil

^[5] Univ Fed Parana, Ctr Estudos Mar, Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REGIONAL STUDIES IN MARINE SCIENCE; v. 35, MAR 2020.
• Citações Web of Science: 0

Resumo

The sediment quality of the Protected Cananeia-Iguape-Peruibe Area (APA-CIP), listed as one of the Wetlands of International Importance (Ramsar Site), was assessed through geochemical and ecotoxicological analyses, in order to determine if organic and inorganic contaminants retained in the sediments were bioavailable to benthic organisms and could trigger negative effects. Lethal (Tiburonella viscana) and sublethal (Lytechinus variegatus and Nitokra sp.) ecotoxicological endpoints were assessed, as well as sediment texture and organic and inorganic contaminants in sediments obtained at six stations distributed along the APA-CIP. Sites under the influence of the maximum turbidity zone and close to the main local urban center (Cananeia city) presented the worst environmental conditions, indicated by sediment toxicities and high contaminants levels. These conditions may be associated to fine-grained sediments. Metal (Pb, Co, Ni and Zn) concentrations exceeded the regional Sediment Quality Guidelines (SQGs) at stations PT and PM, while Pb also exceeded the Canadian Interim Marine Sediment Quality Guidelines (ISQGs). Total Aliphatic Hydrocarbons (AH) were close to threshold sediment contamination values at PT (maximum turbidity zone). These findings indicate that metals from former mining activities reach APA-CIP, in addition to contaminants from local sources (urban centers, docks, fishing wharfs). Contaminants accumulate in low energy regions, where fine particle and organic matter contents are high. Toxicities appeared to be associated to contaminants, suggesting that the multiple local anthropogenic sources can produce ecological risks, indicating the need for multiple efforts to control external and internal contamination sources in this protected estuarine area. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 09/52762-6 - Analise ecotoxicologica e biomonitoramento em bivalves do rio ribeira de iguape - avaliacao da poluicao
• Beneficiário: Denis Moledo de Souza Abessa
• Modalidade de apoio: Auxílio à Pesquisa - Regular