Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations

Detalhes bibliográficos
Autor(a) principal: Carvalho, Susana
Data de Publicação: 2001
Outros Autores: Ravara, A, Quintino, V, Rodrigues, Ana Maria
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/27966
Resumo: The present work is part of an environmental assessment undertaken in the Sado estuary (Southern Channel and Mitrena Peninsula), western coast of Portugal, on February 1999 prior to maintenance dredging works. The macrofauna communities in the study area are generally rich and abundant. A single exception was found: a sampling site in the Mitrena area, with extreme impoverishment, probably related to sediment characteristics, i.e., fluid mud, unfavourable to the establishment of individuals. A comparative analysis of these macrofauna results to previous data from 1986 showed that this biological component had suffered no significant changes, especially as far as the most characteristic species. Although the Southern Channel had been dredged in 1995, no clear signs of such operation were apparent in the present survey. The main differences between both periods (1986-1999) was an increase in the abundance and presence of some common species of organic enriched areas, such as Tharyx sp., Corbula gibba, Spiochaetopterus costarum and Ampelisca spp., which might be related to organic enrichment in the Southern Channel. The joint consideration of our results on benthic macrofauna and those regarding sediment contamination and sediment bioassays, performed at the same time by other researchers, does not indicate the necessity of any particular constraints on the dredging operations.
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spelling Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operationsBenthic communitiesDredging operationsSado estuaryOrganic enrichmentThe present work is part of an environmental assessment undertaken in the Sado estuary (Southern Channel and Mitrena Peninsula), western coast of Portugal, on February 1999 prior to maintenance dredging works. The macrofauna communities in the study area are generally rich and abundant. A single exception was found: a sampling site in the Mitrena area, with extreme impoverishment, probably related to sediment characteristics, i.e., fluid mud, unfavourable to the establishment of individuals. A comparative analysis of these macrofauna results to previous data from 1986 showed that this biological component had suffered no significant changes, especially as far as the most characteristic species. Although the Southern Channel had been dredged in 1995, no clear signs of such operation were apparent in the present survey. The main differences between both periods (1986-1999) was an increase in the abundance and presence of some common species of organic enriched areas, such as Tharyx sp., Corbula gibba, Spiochaetopterus costarum and Ampelisca spp., which might be related to organic enrichment in the Southern Channel. The joint consideration of our results on benthic macrofauna and those regarding sediment contamination and sediment bioassays, performed at the same time by other researchers, does not indicate the necessity of any particular constraints on the dredging operations.2020-03-17T16:37:28Z2001-01-01T00:00:00Z2001info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/27966eng0074-0195Carvalho, SusanaRavara, AQuintino, VRodrigues, Ana Mariainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:54:05Zoai:ria.ua.pt:10773/27966Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:00:36.466425Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
title Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
spellingShingle Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
Carvalho, Susana
Benthic communities
Dredging operations
Sado estuary
Organic enrichment
title_short Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
title_full Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
title_fullStr Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
title_full_unstemmed Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
title_sort Macrobenthic community characterization of an estuary from the Western coast of Portugal (Sado Estuary) prior to dredging operations
author Carvalho, Susana
author_facet Carvalho, Susana
Ravara, A
Quintino, V
Rodrigues, Ana Maria
author_role author
author2 Ravara, A
Quintino, V
Rodrigues, Ana Maria
author2_role author
author
author
dc.contributor.author.fl_str_mv Carvalho, Susana
Ravara, A
Quintino, V
Rodrigues, Ana Maria
dc.subject.por.fl_str_mv Benthic communities
Dredging operations
Sado estuary
Organic enrichment
topic Benthic communities
Dredging operations
Sado estuary
Organic enrichment
description The present work is part of an environmental assessment undertaken in the Sado estuary (Southern Channel and Mitrena Peninsula), western coast of Portugal, on February 1999 prior to maintenance dredging works. The macrofauna communities in the study area are generally rich and abundant. A single exception was found: a sampling site in the Mitrena area, with extreme impoverishment, probably related to sediment characteristics, i.e., fluid mud, unfavourable to the establishment of individuals. A comparative analysis of these macrofauna results to previous data from 1986 showed that this biological component had suffered no significant changes, especially as far as the most characteristic species. Although the Southern Channel had been dredged in 1995, no clear signs of such operation were apparent in the present survey. The main differences between both periods (1986-1999) was an increase in the abundance and presence of some common species of organic enriched areas, such as Tharyx sp., Corbula gibba, Spiochaetopterus costarum and Ampelisca spp., which might be related to organic enrichment in the Southern Channel. The joint consideration of our results on benthic macrofauna and those regarding sediment contamination and sediment bioassays, performed at the same time by other researchers, does not indicate the necessity of any particular constraints on the dredging operations.
publishDate 2001
dc.date.none.fl_str_mv 2001-01-01T00:00:00Z
2001
2020-03-17T16:37:28Z
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