Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/226303 |
Resumo: | Guanabara 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. |
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Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, BrazilBioassaysEcotoxicologyGuanabara BaySedimentGuanabara 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.NEPEA UNESP, São Vicente, 11330-900Programa de Geoquímica UFF, Niteroi, 24020-007LABOMAR UFC, Fortaleza, 60165-081Lab. de Biogeoquímica Marinha UFPR, Curitiba, 80030-070Lab. Eco. Sed. DBM UFF, 100.644 Niterói RJ 24001-970NEPEA UNESP, São Vicente, 11330-900Universidade Estadual Paulista (UNESP)UFFUFCUniversidade Federal do Paraná (UFPR)Maranho, L. A. [UNESP]Abreu, I.Santelli, R.Cordeiro, R. C.Soares-Gomes, A.Moreira, L. B.Morais, R. D.Abessa, D. M.S. [UNESP]2022-04-28T22:37:14Z2022-04-28T22:37:14Z2009-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject851-855Journal of Coastal Research, n. SPEC. ISSUE 56, p. 851-855, 2009.0749-02081551-5036http://hdl.handle.net/11449/2263032-s2.0-79955010654Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Coastal Researchinfo:eu-repo/semantics/openAccess2022-04-28T22:37:14Zoai:repositorio.unesp.br:11449/226303Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:05:43.087812Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
title |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
spellingShingle |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil Maranho, L. A. [UNESP] Bioassays Ecotoxicology Guanabara Bay Sediment |
title_short |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
title_full |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
title_fullStr |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
title_full_unstemmed |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
title_sort |
Sediment toxicity assessment of Guanabara Bay, Rio de Janeiro, Brazil |
author |
Maranho, L. A. [UNESP] |
author_facet |
Maranho, L. A. [UNESP] Abreu, I. Santelli, R. Cordeiro, R. C. Soares-Gomes, A. Moreira, L. B. Morais, R. D. Abessa, D. M.S. [UNESP] |
author_role |
author |
author2 |
Abreu, I. Santelli, R. Cordeiro, R. C. Soares-Gomes, A. Moreira, L. B. Morais, R. D. Abessa, D. M.S. [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) UFF UFC Universidade Federal do Paraná (UFPR) |
dc.contributor.author.fl_str_mv |
Maranho, L. A. [UNESP] Abreu, I. Santelli, R. Cordeiro, R. C. Soares-Gomes, A. Moreira, L. B. Morais, R. D. Abessa, D. M.S. [UNESP] |
dc.subject.por.fl_str_mv |
Bioassays Ecotoxicology Guanabara Bay Sediment |
topic |
Bioassays Ecotoxicology Guanabara Bay Sediment |
description |
Guanabara 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. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-12-01 2022-04-28T22:37:14Z 2022-04-28T22:37:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Journal of Coastal Research, n. SPEC. ISSUE 56, p. 851-855, 2009. 0749-0208 1551-5036 http://hdl.handle.net/11449/226303 2-s2.0-79955010654 |
identifier_str_mv |
Journal of Coastal Research, n. SPEC. ISSUE 56, p. 851-855, 2009. 0749-0208 1551-5036 2-s2.0-79955010654 |
url |
http://hdl.handle.net/11449/226303 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Coastal Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
851-855 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128607048957952 |