Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil

Detalhes bibliográficos
Autor(a) principal: Angonesi, Luciana Garcia
Data de Publicação: 2006
Outros Autores: Gandra, Michel Steinmetz, Bemvenuti, Carlos Emílio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/1830
Resumo: The aim of this study was to evaluate the deposition impact of dredged material from Patos lagoon estuary on a benthic macroinvertebrate assemblage structure in an adjacent coastal marine area. Nine sampling stations were chosen at random in the disposal area, and nine others in the same way in an adjacent control area. Samples were collected at a 19 m depth before sediment disposal (11 July 2000), during dredging and disposal operations (25 Oct. 2000), and three months thereafter (24 Aug. 2001). Statistical analysis indicated that sampling periods presented similar characteristics in both the control and disposal sites. Disposal of dredged sediment from Patos lagoon had no detectable detrimental effects upon macrobenthic faunal assemblage at the dumping site. This result is attributed both to adaptation of resident biota to dynamic sedimentary conditions and to the fine estuarine sediment dredged, the dispersion of which in the water column might have minimized sediment deposition and consequent damage to the benthic fauna.
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spelling Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern BrazilEfeitos da deposição de material proveniente de dragagem sobre uma associação de macroinvertebrados bentônicos na zona costeira do sul do BrasilDredgeEnvironmental impactPatos lagoonCoastal zoneDragagemImpacto ambientalLagoa dos patosZona costeiraThe aim of this study was to evaluate the deposition impact of dredged material from Patos lagoon estuary on a benthic macroinvertebrate assemblage structure in an adjacent coastal marine area. Nine sampling stations were chosen at random in the disposal area, and nine others in the same way in an adjacent control area. Samples were collected at a 19 m depth before sediment disposal (11 July 2000), during dredging and disposal operations (25 Oct. 2000), and three months thereafter (24 Aug. 2001). Statistical analysis indicated that sampling periods presented similar characteristics in both the control and disposal sites. Disposal of dredged sediment from Patos lagoon had no detectable detrimental effects upon macrobenthic faunal assemblage at the dumping site. This result is attributed both to adaptation of resident biota to dynamic sedimentary conditions and to the fine estuarine sediment dredged, the dispersion of which in the water column might have minimized sediment deposition and consequent damage to the benthic fauna.Objetivou-se avaliar o impacto da deposição de material dragado proveniente da região estuarina da lagoa dos Patos sobre a estrutura da associação macrobentônica no sítio de deposição, situado no ambiente marinho costeiro adjacente à desembocadura da laguna. Nove estações de coleta foram sorteadas, tanto no sítio de deposição quanto na área controle adjacente. As amostras, a 19 m de profundidade, foram coletadas antes do início de deposição do sedimento (11/07/2000), durante as operações de dragagem e deposição (25/10/2000) e três meses após o encerramento das atividades de deposição do material dragado (24/08/2001). Análises estatísticas indicaram que áreas controle e sítio de deposição apresentaram características faunísticas similares dentro dos períodos amostrais. Não foram detectados efeitos prejudiciais da deposição do sedimento sobre a associação de macroinvertebrados bentônicos na área de depósito. Este resultado pode ser atribuído às características da biota residente que está, provavelmente, adaptada às condições da dinâmica sedimentar do local e também às características predominantemente finas do sedimento dragado que, ao dispersar-se na coluna d´água, minimizaram a deposição das frações mais finas e um eventual dano ao macrozoobentos.2012-03-06T03:14:19Z2012-03-06T03:14:19Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfANGONESI, Luciana Garcia; GANDRA, Michel Steinmetz; BEMVENUTI, Carlos Emílio. Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil. Brazilian Journal of Biology, v. 66, n. 2A, p. 413-420, 2006. Disponível em:<http://www.scielo.br/pdf/bjb/v66n2a/a05v662a.pdf>. Acesso em : 12 jan. 2012.http://repositorio.furg.br/handle/1/1830engAngonesi, Luciana GarciaGandra, Michel SteinmetzBemvenuti, Carlos Emílioinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2012-03-06T03:14:20Zoai:repositorio.furg.br:1/1830Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2012-03-06T03:14:20Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
Efeitos da deposição de material proveniente de dragagem sobre uma associação de macroinvertebrados bentônicos na zona costeira do sul do Brasil
title Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
spellingShingle Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
Angonesi, Luciana Garcia
Dredge
Environmental impact
Patos lagoon
Coastal zone
Dragagem
Impacto ambiental
Lagoa dos patos
Zona costeira
title_short Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
title_full Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
title_fullStr Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
title_full_unstemmed Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
title_sort Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil
author Angonesi, Luciana Garcia
author_facet Angonesi, Luciana Garcia
Gandra, Michel Steinmetz
Bemvenuti, Carlos Emílio
author_role author
author2 Gandra, Michel Steinmetz
Bemvenuti, Carlos Emílio
author2_role author
author
dc.contributor.author.fl_str_mv Angonesi, Luciana Garcia
Gandra, Michel Steinmetz
Bemvenuti, Carlos Emílio
dc.subject.por.fl_str_mv Dredge
Environmental impact
Patos lagoon
Coastal zone
Dragagem
Impacto ambiental
Lagoa dos patos
Zona costeira
topic Dredge
Environmental impact
Patos lagoon
Coastal zone
Dragagem
Impacto ambiental
Lagoa dos patos
Zona costeira
description The aim of this study was to evaluate the deposition impact of dredged material from Patos lagoon estuary on a benthic macroinvertebrate assemblage structure in an adjacent coastal marine area. Nine sampling stations were chosen at random in the disposal area, and nine others in the same way in an adjacent control area. Samples were collected at a 19 m depth before sediment disposal (11 July 2000), during dredging and disposal operations (25 Oct. 2000), and three months thereafter (24 Aug. 2001). Statistical analysis indicated that sampling periods presented similar characteristics in both the control and disposal sites. Disposal of dredged sediment from Patos lagoon had no detectable detrimental effects upon macrobenthic faunal assemblage at the dumping site. This result is attributed both to adaptation of resident biota to dynamic sedimentary conditions and to the fine estuarine sediment dredged, the dispersion of which in the water column might have minimized sediment deposition and consequent damage to the benthic fauna.
publishDate 2006
dc.date.none.fl_str_mv 2006
2012-03-06T03:14:19Z
2012-03-06T03:14:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv ANGONESI, Luciana Garcia; GANDRA, Michel Steinmetz; BEMVENUTI, Carlos Emílio. Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil. Brazilian Journal of Biology, v. 66, n. 2A, p. 413-420, 2006. Disponível em:<http://www.scielo.br/pdf/bjb/v66n2a/a05v662a.pdf>. Acesso em : 12 jan. 2012.
http://repositorio.furg.br/handle/1/1830
identifier_str_mv ANGONESI, Luciana Garcia; GANDRA, Michel Steinmetz; BEMVENUTI, Carlos Emílio. Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in southern Brazil. Brazilian Journal of Biology, v. 66, n. 2A, p. 413-420, 2006. Disponível em:<http://www.scielo.br/pdf/bjb/v66n2a/a05v662a.pdf>. Acesso em : 12 jan. 2012.
url http://repositorio.furg.br/handle/1/1830
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
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