Bacterioplankton dynamics in the Mondego estuary (Portugal)
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/5401 https://doi.org/10.1016/S1146-609X(03)00016-X |
Resumo: | In this work, the density of bacterioplankton and environmental parameters were monitored over a 11 month period (July 1999-June 2000), and also during one tidal cycle (15 June 2000), at two sampling stations, in the estuary of River Mondego. These data were treated by multivariate analyses methods in order to identify the key factors that control the dynamics of the bacterioplankton in the estuary. Bacterial dynamics were dominated by temporal gradients (annual seasons and tide-related) and less by the spatial structure of the estuary. Three main metabolic groups of bacterioplankton--aerobic heterotrophic bacteria, sulphate-reducing bacteria (SRB) and nitrate-reducing bacteria (NRB)--involved in the cycling of organic matter, were present in the water column of the estuary. Their relative abundance depended on the particular physical, chemical and biological environment. The abundance of aerobic heterotrophic bacteria, during the 11 month study, was modelled as a function of nitrate (the most important variable, with a negative effect), temperature, salinity and pH (with positive effects). SRB appeared to be limited to the water-sediment interface, where concentrations of sulphate and POM were greater. A competition between SRB and NRB for carbon has also been suggested. |
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Bacterioplankton dynamics in the Mondego estuary (Portugal)Bacterioplankton dynamicsEnvironmental parametersSeasonal variationTidal variationIn this work, the density of bacterioplankton and environmental parameters were monitored over a 11 month period (July 1999-June 2000), and also during one tidal cycle (15 June 2000), at two sampling stations, in the estuary of River Mondego. These data were treated by multivariate analyses methods in order to identify the key factors that control the dynamics of the bacterioplankton in the estuary. Bacterial dynamics were dominated by temporal gradients (annual seasons and tide-related) and less by the spatial structure of the estuary. Three main metabolic groups of bacterioplankton--aerobic heterotrophic bacteria, sulphate-reducing bacteria (SRB) and nitrate-reducing bacteria (NRB)--involved in the cycling of organic matter, were present in the water column of the estuary. Their relative abundance depended on the particular physical, chemical and biological environment. The abundance of aerobic heterotrophic bacteria, during the 11 month study, was modelled as a function of nitrate (the most important variable, with a negative effect), temperature, salinity and pH (with positive effects). SRB appeared to be limited to the water-sediment interface, where concentrations of sulphate and POM were greater. A competition between SRB and NRB for carbon has also been suggested.http://www.sciencedirect.com/science/article/B6VR3-4B6JTC7-8/1/1f5b2e8bcb56fdceb5fffe6f34b30e3b2003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5401http://hdl.handle.net/10316/5401https://doi.org/10.1016/S1146-609X(03)00016-XengActa Oecologica. 24:Supplement 1 (2003) S67-S75Bacelar-Nicolau, P.Nicolau, L. B.Marques, J. C.Morgado, F.Pastorinho, R.Azeiteiro, U. M.info: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:RCAAP2020-11-06T16:59:57Zoai:estudogeral.uc.pt:10316/5401Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:28.720728Repositório 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 |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
title |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
spellingShingle |
Bacterioplankton dynamics in the Mondego estuary (Portugal) Bacelar-Nicolau, P. Bacterioplankton dynamics Environmental parameters Seasonal variation Tidal variation |
title_short |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
title_full |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
title_fullStr |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
title_full_unstemmed |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
title_sort |
Bacterioplankton dynamics in the Mondego estuary (Portugal) |
author |
Bacelar-Nicolau, P. |
author_facet |
Bacelar-Nicolau, P. Nicolau, L. B. Marques, J. C. Morgado, F. Pastorinho, R. Azeiteiro, U. M. |
author_role |
author |
author2 |
Nicolau, L. B. Marques, J. C. Morgado, F. Pastorinho, R. Azeiteiro, U. M. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Bacelar-Nicolau, P. Nicolau, L. B. Marques, J. C. Morgado, F. Pastorinho, R. Azeiteiro, U. M. |
dc.subject.por.fl_str_mv |
Bacterioplankton dynamics Environmental parameters Seasonal variation Tidal variation |
topic |
Bacterioplankton dynamics Environmental parameters Seasonal variation Tidal variation |
description |
In this work, the density of bacterioplankton and environmental parameters were monitored over a 11 month period (July 1999-June 2000), and also during one tidal cycle (15 June 2000), at two sampling stations, in the estuary of River Mondego. These data were treated by multivariate analyses methods in order to identify the key factors that control the dynamics of the bacterioplankton in the estuary. Bacterial dynamics were dominated by temporal gradients (annual seasons and tide-related) and less by the spatial structure of the estuary. Three main metabolic groups of bacterioplankton--aerobic heterotrophic bacteria, sulphate-reducing bacteria (SRB) and nitrate-reducing bacteria (NRB)--involved in the cycling of organic matter, were present in the water column of the estuary. Their relative abundance depended on the particular physical, chemical and biological environment. The abundance of aerobic heterotrophic bacteria, during the 11 month study, was modelled as a function of nitrate (the most important variable, with a negative effect), temperature, salinity and pH (with positive effects). SRB appeared to be limited to the water-sediment interface, where concentrations of sulphate and POM were greater. A competition between SRB and NRB for carbon has also been suggested. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 |
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 |
http://hdl.handle.net/10316/5401 http://hdl.handle.net/10316/5401 https://doi.org/10.1016/S1146-609X(03)00016-X |
url |
http://hdl.handle.net/10316/5401 https://doi.org/10.1016/S1146-609X(03)00016-X |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Acta Oecologica. 24:Supplement 1 (2003) S67-S75 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133841732927488 |