Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances

Detalhes bibliográficos
Autor(a) principal: Cardoso, P. G.
Data de Publicação: 2005
Outros Autores: Brandão, A., Pardal, M. A., Raffaelli, D., Marques, J. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/13109
https://doi.org/10.3354/meps289191
Resumo: In the Mondego estuary (Portugal), several mitigation measures (nutrient loading reduction, seagrass bed protection and freshwater circulation enhancement) were implemented in 1998 to promote the recovery of the seagrass bed and the entire surrounding environment following a long period of eutrophication. In the present study we evaluate the success of this restoration project, by comparing the water nutrient concentrations, the seagrass-cover extent and the dynamics of Hydrobia ulvae, before and after implementation of the management measures. During the period in which environmental quality declined, H. ulvae abundance, biomass and growth production declined, associated with the almost total disappearance of the macrophyte Zostera noltii. However, after the implementation of management measures, dissolved nutrients and green macroalgal blooms were much reduced, and the seagrass bed started to recover. The H. ulvae population also responded positively, becoming more structured (including individuals of all age classes), with higher abundance and biomass. Major flood events demonstrated that the resilience of the H. ulvae population may have been lowered by the original chronic stressor (eutrophication). The population structure of H. ulvae in the most stressed site continued to be dominated by small individuals despite the improvements in water quality, probably a result of the absence of seagrass plants at this site. Estuarine restoration programmes need to recognise the importance of understanding the resilience of populations and the interactions of multiple stressors
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spelling Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbancesEutrophicationEcological restorationManagementZostera noltii bedHydrobia ulvaeIn the Mondego estuary (Portugal), several mitigation measures (nutrient loading reduction, seagrass bed protection and freshwater circulation enhancement) were implemented in 1998 to promote the recovery of the seagrass bed and the entire surrounding environment following a long period of eutrophication. In the present study we evaluate the success of this restoration project, by comparing the water nutrient concentrations, the seagrass-cover extent and the dynamics of Hydrobia ulvae, before and after implementation of the management measures. During the period in which environmental quality declined, H. ulvae abundance, biomass and growth production declined, associated with the almost total disappearance of the macrophyte Zostera noltii. However, after the implementation of management measures, dissolved nutrients and green macroalgal blooms were much reduced, and the seagrass bed started to recover. The H. ulvae population also responded positively, becoming more structured (including individuals of all age classes), with higher abundance and biomass. Major flood events demonstrated that the resilience of the H. ulvae population may have been lowered by the original chronic stressor (eutrophication). The population structure of H. ulvae in the most stressed site continued to be dominated by small individuals despite the improvements in water quality, probably a result of the absence of seagrass plants at this site. Estuarine restoration programmes need to recognise the importance of understanding the resilience of populations and the interactions of multiple stressorsInter-Research2005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/13109http://hdl.handle.net/10316/13109https://doi.org/10.3354/meps289191engMarine Ecology Progress Series. 289 (2005) 191-1990171-8630Cardoso, P. G.Brandão, A.Pardal, M. A.Raffaelli, D.Marques, J. C.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:RCAAP2020-11-06T17:00:28Zoai:estudogeral.uc.pt:10316/13109Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:54.959595Repositório 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 Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
title Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
spellingShingle Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
Cardoso, P. G.
Eutrophication
Ecological restoration
Management
Zostera noltii bed
Hydrobia ulvae
title_short Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
title_full Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
title_fullStr Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
title_full_unstemmed Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
title_sort Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
author Cardoso, P. G.
author_facet Cardoso, P. G.
Brandão, A.
Pardal, M. A.
Raffaelli, D.
Marques, J. C.
author_role author
author2 Brandão, A.
Pardal, M. A.
Raffaelli, D.
Marques, J. C.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Cardoso, P. G.
Brandão, A.
Pardal, M. A.
Raffaelli, D.
Marques, J. C.
dc.subject.por.fl_str_mv Eutrophication
Ecological restoration
Management
Zostera noltii bed
Hydrobia ulvae
topic Eutrophication
Ecological restoration
Management
Zostera noltii bed
Hydrobia ulvae
description In the Mondego estuary (Portugal), several mitigation measures (nutrient loading reduction, seagrass bed protection and freshwater circulation enhancement) were implemented in 1998 to promote the recovery of the seagrass bed and the entire surrounding environment following a long period of eutrophication. In the present study we evaluate the success of this restoration project, by comparing the water nutrient concentrations, the seagrass-cover extent and the dynamics of Hydrobia ulvae, before and after implementation of the management measures. During the period in which environmental quality declined, H. ulvae abundance, biomass and growth production declined, associated with the almost total disappearance of the macrophyte Zostera noltii. However, after the implementation of management measures, dissolved nutrients and green macroalgal blooms were much reduced, and the seagrass bed started to recover. The H. ulvae population also responded positively, becoming more structured (including individuals of all age classes), with higher abundance and biomass. Major flood events demonstrated that the resilience of the H. ulvae population may have been lowered by the original chronic stressor (eutrophication). The population structure of H. ulvae in the most stressed site continued to be dominated by small individuals despite the improvements in water quality, probably a result of the absence of seagrass plants at this site. Estuarine restoration programmes need to recognise the importance of understanding the resilience of populations and the interactions of multiple stressors
publishDate 2005
dc.date.none.fl_str_mv 2005
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/10316/13109
http://hdl.handle.net/10316/13109
https://doi.org/10.3354/meps289191
url http://hdl.handle.net/10316/13109
https://doi.org/10.3354/meps289191
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Marine Ecology Progress Series. 289 (2005) 191-199
0171-8630
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eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Inter-Research
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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
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