Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management
Autor(a) principal: | |
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Data de Publicação: | 2008 |
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/10316/5316 https://doi.org/10.1016/j.ecss.2007.06.013 |
Resumo: | Although mitigation programmes have been implemented in huge eutrophied estuarine systems, satisfactory results are not always immediately achieved. External loadings are reduced but the nutrient pools still existing in the sediments (due to decades of external supply) start to deplete only slowly, to reach the lower steady state level related to the new external loading. In the Mondego Estuary, this situation could be seen from the mass balance calculations including different nutrient fractions (dissolved, SPM and bound in vegetation). Different nutrient fractions quantified over the year showed the retention capacity and supplying capacity of these estuarine systems, and also the seasonal dynamics those fractions can present. External loading of nitrogen was largely dominated by DIN, but after its incorporation by benthic primary producers nitrogen export occurred essentially as SPM-N. Phosphorus loading was dominated by SPM-P, but during warmer periods P-efflux increased DIP concentration inside the system and was afterwards exported through the outer boundary. Although nutrients bound in vegetation were not significant to total mass balance, depending on the occurrence of occasional macroalgal blooms, the vegetation fraction can significantly increase its contribution to the overall balance. |
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Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for managementmanagementnutrient loadingtransportecological modellingmass balanceresidence timeAlthough mitigation programmes have been implemented in huge eutrophied estuarine systems, satisfactory results are not always immediately achieved. External loadings are reduced but the nutrient pools still existing in the sediments (due to decades of external supply) start to deplete only slowly, to reach the lower steady state level related to the new external loading. In the Mondego Estuary, this situation could be seen from the mass balance calculations including different nutrient fractions (dissolved, SPM and bound in vegetation). Different nutrient fractions quantified over the year showed the retention capacity and supplying capacity of these estuarine systems, and also the seasonal dynamics those fractions can present. External loading of nitrogen was largely dominated by DIN, but after its incorporation by benthic primary producers nitrogen export occurred essentially as SPM-N. Phosphorus loading was dominated by SPM-P, but during warmer periods P-efflux increased DIP concentration inside the system and was afterwards exported through the outer boundary. Although nutrients bound in vegetation were not significant to total mass balance, depending on the occurrence of occasional macroalgal blooms, the vegetation fraction can significantly increase its contribution to the overall balance.http://www.sciencedirect.com/science/article/B6WDV-4PCH4GK-3/1/443da3c46a02fffbce05a7a866d2326d2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5316http://hdl.handle.net/10316/5316https://doi.org/10.1016/j.ecss.2007.06.013engEstuarine, Coastal and Shelf Science. 76:1 (2008) 175-185Neto, João MagalhãesFlindt, Mogens RenéMarques, João CarlosPardal, 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:RCAAP2021-10-07T11:51:02Zoai:estudogeral.uc.pt:10316/5316Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:26.652224Repositório 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 |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
title |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
spellingShingle |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management Neto, João Magalhães management nutrient loading transport ecological modelling mass balance residence time |
title_short |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
title_full |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
title_fullStr |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
title_full_unstemmed |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
title_sort |
Modelling nutrient mass balance in a temperate meso-tidal estuary: Implications for management |
author |
Neto, João Magalhães |
author_facet |
Neto, João Magalhães Flindt, Mogens René Marques, João Carlos Pardal, Miguel Ângelo |
author_role |
author |
author2 |
Flindt, Mogens René Marques, João Carlos Pardal, Miguel Ângelo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Neto, João Magalhães Flindt, Mogens René Marques, João Carlos Pardal, Miguel Ângelo |
dc.subject.por.fl_str_mv |
management nutrient loading transport ecological modelling mass balance residence time |
topic |
management nutrient loading transport ecological modelling mass balance residence time |
description |
Although mitigation programmes have been implemented in huge eutrophied estuarine systems, satisfactory results are not always immediately achieved. External loadings are reduced but the nutrient pools still existing in the sediments (due to decades of external supply) start to deplete only slowly, to reach the lower steady state level related to the new external loading. In the Mondego Estuary, this situation could be seen from the mass balance calculations including different nutrient fractions (dissolved, SPM and bound in vegetation). Different nutrient fractions quantified over the year showed the retention capacity and supplying capacity of these estuarine systems, and also the seasonal dynamics those fractions can present. External loading of nitrogen was largely dominated by DIN, but after its incorporation by benthic primary producers nitrogen export occurred essentially as SPM-N. Phosphorus loading was dominated by SPM-P, but during warmer periods P-efflux increased DIP concentration inside the system and was afterwards exported through the outer boundary. Although nutrients bound in vegetation were not significant to total mass balance, depending on the occurrence of occasional macroalgal blooms, the vegetation fraction can significantly increase its contribution to the overall balance. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 |
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/10316/5316 http://hdl.handle.net/10316/5316 https://doi.org/10.1016/j.ecss.2007.06.013 |
url |
http://hdl.handle.net/10316/5316 https://doi.org/10.1016/j.ecss.2007.06.013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Estuarine, Coastal and Shelf Science. 76:1 (2008) 175-185 |
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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1799133841660575744 |