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dc.contributor.authorMaranho, L. A.-
dc.contributor.authorAbreu, I.-
dc.contributor.authorSantelli, R.-
dc.contributor.authorCordeiro, R. C.-
dc.contributor.authorSoares-Gomes, A.-
dc.contributor.authorMoreira, L. B.-
dc.contributor.authorMorais, R. D.-
dc.contributor.authorAbessa, Denis Moledo de Souza-
dc.date.accessioned2014-05-20T13:12:24Z-
dc.date.accessioned2016-10-25T16:32:53Z-
dc.date.available2014-05-20T13:12:24Z-
dc.date.available2016-10-25T16:32:53Z-
dc.date.issued2009-01-01-
dc.identifier.citationJournal of Coastal Research. Lawrence: Coastal Education & Research Foundation, p. 851-855, 2009.-
dc.identifier.issn0749-0208-
dc.identifier.urihttp://hdl.handle.net/11449/374-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/374-
dc.description.abstractGuanabara Bay (GB) comprises of estuarine and marine environments of high ecological and socio-economic relevance, together with port, industrial and urban areas. The anthropogenic activities produce environmental impacts, including the aquatic pollution. The sediment quality assessment is important to evaluate the effects of contamination, once sediments are a repository for most of the contaminants. In this Study, the quality of sediments from GB was evaluated, in rainy and dry periods, throughout the employment of acute toxicity tests with the amphipod Tiburonella viscana, and chronic bioassays with embryos of the sea-urchin Lytechinus variegatus. In the dry period, acute toxicity was found in the sediments from stations 1, 2 3 (NW) and 7 (near Guapimirim Environmental Protection Area). The bioassays with liquid phases showed effects, but were strongly influenced by the unionized ammonia levels, which were high in this period. In the rainy period, acute toxicity was found in sediments samples from stations 1, 2, 3, 6, 8, 10, 11, 12 and 15. Chronic toxicity could be clearly detected, as ammonia concentrations tended to be low in the most part of the samples. The results showed that the sediment toxicity is influenced by precipitation rates, which increase the input of contaminants to the Bay, and also allowed subdividing GB in three main zones: northwest (stations 1, 2, 3, 5), northeast (stations 6, 7, 8, 9) and centre-south (stations 10, 11, 12, 13, 14, 15). Results also showed that the quality of GB sediments is poor, and that toxicity tests could determine the combined effects of pollutants.en
dc.format.extent851-855-
dc.language.isoeng-
dc.publisherCoastal Education & Research Foundation-
dc.sourceWeb of Science-
dc.subjectbioassaysen
dc.subjectsedimenten
dc.subjectEcotoxicologyen
dc.subjectGuanabara Bayen
dc.titleSediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil.en
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal do Ceará (UFC)-
dc.contributor.institutionUniversidade Federal do Paraná (UFPR)-
dc.contributor.institutionUniversidade Federal Fluminense (UFF)-
dc.description.affiliationUNESP, NEPEA, BR-11330900 Sao Vicente, Brazil-
dc.description.affiliationUniv Fed Fluminense, Programa Geoquim, BR-24020007 Niteroi, RJ, Brazil-
dc.description.affiliationUniversidade Federal do Ceará (UFC), LABOMAR, BR-60165081 Fortaleza, Ceara, Brazil-
dc.description.affiliationUFPR, Lab Biogeoquim Marinha, BR-80030700 Curitiba, Parana, Brazil-
dc.description.affiliationUniv Fed Fluminense, Lab Eco Sed, DBM, BR-24001970 Niteroi, RJ, Brazil-
dc.description.affiliationUnespUNESP, NEPEA, BR-11330900 Sao Vicente, Brazil-
dc.identifier.wosWOS:000266722300176-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Coastal Research-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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