Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary
Autor(a) principal: | |
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Data de Publicação: | 2007 |
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/10316/5326 https://doi.org/10.1016/j.ecss.2007.03.010 |
Resumo: | As a consequence of climate change, flood and drought events are increasing in frequency throughout the world. Nevertheless, knowledge of the effects on zooplankton estuarine communities is still scarce. The present study aimed to examine zooplankton ecology over two contrasting environmental conditions: regular years and extreme dry years, in a shallow temperate southern European estuary, the Mondego Estuary (Portugal). Monthly samples were carried out during three consecutive years: 2003 characterized as a regular temperate year concerning precipitation and river flow, and an extremely dry period during 2004-2005. The spatial and temporal structure of the biological data was evaluated by a three-mode principal component analysis (PCA), which allowed us to distinguish three distinct ecological areas based on their biological composition and their relationship with hydrologic parameters. The severe drought in 2004-2005 was responsible for spatial shifts in the estuary regarding zooplankton community and interannual variability, with an increase in abundance and diversity during the period of low freshwater flow. This freshwater flow regime influenced the composition of the zooplankton community at the most upstream section of Mondego estuary (zone 3), with a replacement of the freshwater community by one predominantly dominated by estuarine organisms. The occurrence of such estuarine community contributed to the increase in zooplankton abundance which is ascribed to the estuarine species Acartia tonsa. The comparison with previous data obtained for this estuarine ecosystem, demonstrated the occurrence of a different scenario at times of high freshwater flow, being defined the existence of two sub-estuarine systems, the north and south arm, presenting the south one the highest values of abundance. |
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Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuarymesozooplankton communityinterannual variabilityextreme eventsthree-mode principal component analysis (PCA)estuaryAs a consequence of climate change, flood and drought events are increasing in frequency throughout the world. Nevertheless, knowledge of the effects on zooplankton estuarine communities is still scarce. The present study aimed to examine zooplankton ecology over two contrasting environmental conditions: regular years and extreme dry years, in a shallow temperate southern European estuary, the Mondego Estuary (Portugal). Monthly samples were carried out during three consecutive years: 2003 characterized as a regular temperate year concerning precipitation and river flow, and an extremely dry period during 2004-2005. The spatial and temporal structure of the biological data was evaluated by a three-mode principal component analysis (PCA), which allowed us to distinguish three distinct ecological areas based on their biological composition and their relationship with hydrologic parameters. The severe drought in 2004-2005 was responsible for spatial shifts in the estuary regarding zooplankton community and interannual variability, with an increase in abundance and diversity during the period of low freshwater flow. This freshwater flow regime influenced the composition of the zooplankton community at the most upstream section of Mondego estuary (zone 3), with a replacement of the freshwater community by one predominantly dominated by estuarine organisms. The occurrence of such estuarine community contributed to the increase in zooplankton abundance which is ascribed to the estuarine species Acartia tonsa. The comparison with previous data obtained for this estuarine ecosystem, demonstrated the occurrence of a different scenario at times of high freshwater flow, being defined the existence of two sub-estuarine systems, the north and south arm, presenting the south one the highest values of abundance.http://www.sciencedirect.com/science/article/B6WDV-4NK47BF-2/1/047e1282ba1db2540c1f3e42933c735b2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5326http://hdl.handle.net/10316/5326https://doi.org/10.1016/j.ecss.2007.03.010engEstuarine, Coastal and Shelf Science. 73:3-4 (2007) 725-734Marques, Sónia CotrimAzeiteiro, Ulisses MirandaMartinho, FilipePardal, Miguel Ângeloinfo: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:RCAAP2021-10-07T11:51:01Zoai:estudogeral.uc.pt:10316/5326Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:26.848140Repositório 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 |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
title |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
spellingShingle |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary Marques, Sónia Cotrim mesozooplankton community interannual variability extreme events three-mode principal component analysis (PCA) estuary |
title_short |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
title_full |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
title_fullStr |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
title_full_unstemmed |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
title_sort |
Climate variability and planktonic communities: The effect of an extreme event (severe drought) in a southern European estuary |
author |
Marques, Sónia Cotrim |
author_facet |
Marques, Sónia Cotrim Azeiteiro, Ulisses Miranda Martinho, Filipe Pardal, Miguel Ângelo |
author_role |
author |
author2 |
Azeiteiro, Ulisses Miranda Martinho, Filipe Pardal, Miguel Ângelo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Marques, Sónia Cotrim Azeiteiro, Ulisses Miranda Martinho, Filipe Pardal, Miguel Ângelo |
dc.subject.por.fl_str_mv |
mesozooplankton community interannual variability extreme events three-mode principal component analysis (PCA) estuary |
topic |
mesozooplankton community interannual variability extreme events three-mode principal component analysis (PCA) estuary |
description |
As a consequence of climate change, flood and drought events are increasing in frequency throughout the world. Nevertheless, knowledge of the effects on zooplankton estuarine communities is still scarce. The present study aimed to examine zooplankton ecology over two contrasting environmental conditions: regular years and extreme dry years, in a shallow temperate southern European estuary, the Mondego Estuary (Portugal). Monthly samples were carried out during three consecutive years: 2003 characterized as a regular temperate year concerning precipitation and river flow, and an extremely dry period during 2004-2005. The spatial and temporal structure of the biological data was evaluated by a three-mode principal component analysis (PCA), which allowed us to distinguish three distinct ecological areas based on their biological composition and their relationship with hydrologic parameters. The severe drought in 2004-2005 was responsible for spatial shifts in the estuary regarding zooplankton community and interannual variability, with an increase in abundance and diversity during the period of low freshwater flow. This freshwater flow regime influenced the composition of the zooplankton community at the most upstream section of Mondego estuary (zone 3), with a replacement of the freshwater community by one predominantly dominated by estuarine organisms. The occurrence of such estuarine community contributed to the increase in zooplankton abundance which is ascribed to the estuarine species Acartia tonsa. The comparison with previous data obtained for this estuarine ecosystem, demonstrated the occurrence of a different scenario at times of high freshwater flow, being defined the existence of two sub-estuarine systems, the north and south arm, presenting the south one the highest values of abundance. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 |
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/10316/5326 http://hdl.handle.net/10316/5326 https://doi.org/10.1016/j.ecss.2007.03.010 |
url |
http://hdl.handle.net/10316/5326 https://doi.org/10.1016/j.ecss.2007.03.010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Estuarine, Coastal and Shelf Science. 73:3-4 (2007) 725-734 |
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 |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
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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1799133841666867200 |