Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).

Sources of organic matter and nitrogen to the rías of Ortigueira, O Barqueiro and Viveiro (Galicia, N Spain) were traced using stable carbon and nitrogen isotopes. Samples of water, seston, benthic organisms and sediments were collected in summer 2007 and 2008. Instantaneous sources were inferred fr...

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Detalles Bibliográficos
Autores: Bode, Antonio, Varela-Rodríguez, Manuel, Prego, Ricardo
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/316426
Acceso en línea:http://hdl.handle.net/10261/316426
Access Level:acceso abierto
Palabra clave:Centro Oceanográfico de A Coruña
Medio Marino
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spelling Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).Bode, AntonioVarela-Rodríguez, ManuelPrego, RicardoCentro Oceanográfico de A CoruñaMedio MarinoSources of organic matter and nitrogen to the rías of Ortigueira, O Barqueiro and Viveiro (Galicia, N Spain) were traced using stable carbon and nitrogen isotopes. Samples of water, seston, benthic organisms and sediments were collected in summer 2007 and 2008. Instantaneous sources were inferred from the concentrations and isotopic composition of seston, while averaged sources over longer time scales (months) were inferred from stable isotopes in macrophytes (Ascophyllum nodosum and Fucus vesiculosus) and mussels (Mytilus galloprovincialis). Dissolved nitrate, nitrite and ammonium concentrations in surface water were low in the estuarine zone and generally increased towards the river and the open sea in all rías. Nitrite and ammonium values were generally low, suggesting low importance of in situ nitrification and denitrification processes. The concentrations of ammonium, chlorophyll, and heavy nitrogen isotopes in seston were higher only in the main river of Viveiro, suggesting local pollution. Isotopic signatures and high nitrogen concentrations in seston discharged from the wastewater treatment plants indicated incomplete removal of nitrogen. However, taking into account water discharge fluxes and the isotopic composition of all compartments analysed, all rías shared similar biogeochemical and trophic diversity and showed a low impact of anthropogenic sources at both short and long time scales. Dominance of marine waters, low river flow, and small urban population sizes in the watershed all contribute to the maintenance of the relatively pristine status of northern Galician rías.Sí202320232011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/316426reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de A Coruñahttps://www.int-res.com/abstracts/meps/v437/p13-26/info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3164262026-05-22T06:33:51Z
dc.title.none.fl_str_mv Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
title Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
spellingShingle Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
Bode, Antonio
Centro Oceanográfico de A Coruña
Medio Marino
title_short Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
title_full Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
title_fullStr Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
title_full_unstemmed Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
title_sort Continental and marine sources of organic matter and nitrogen for rías of northern Galicia (Spain).
dc.creator.none.fl_str_mv Bode, Antonio
Varela-Rodríguez, Manuel
Prego, Ricardo
author Bode, Antonio
author_facet Bode, Antonio
Varela-Rodríguez, Manuel
Prego, Ricardo
author_role author
author2 Varela-Rodríguez, Manuel
Prego, Ricardo
author2_role author
author
dc.subject.none.fl_str_mv Centro Oceanográfico de A Coruña
Medio Marino
topic Centro Oceanográfico de A Coruña
Medio Marino
description Sources of organic matter and nitrogen to the rías of Ortigueira, O Barqueiro and Viveiro (Galicia, N Spain) were traced using stable carbon and nitrogen isotopes. Samples of water, seston, benthic organisms and sediments were collected in summer 2007 and 2008. Instantaneous sources were inferred from the concentrations and isotopic composition of seston, while averaged sources over longer time scales (months) were inferred from stable isotopes in macrophytes (Ascophyllum nodosum and Fucus vesiculosus) and mussels (Mytilus galloprovincialis). Dissolved nitrate, nitrite and ammonium concentrations in surface water were low in the estuarine zone and generally increased towards the river and the open sea in all rías. Nitrite and ammonium values were generally low, suggesting low importance of in situ nitrification and denitrification processes. The concentrations of ammonium, chlorophyll, and heavy nitrogen isotopes in seston were higher only in the main river of Viveiro, suggesting local pollution. Isotopic signatures and high nitrogen concentrations in seston discharged from the wastewater treatment plants indicated incomplete removal of nitrogen. However, taking into account water discharge fluxes and the isotopic composition of all compartments analysed, all rías shared similar biogeochemical and trophic diversity and showed a low impact of anthropogenic sources at both short and long time scales. Dominance of marine waters, low river flow, and small urban population sizes in the watershed all contribute to the maintenance of the relatively pristine status of northern Galician rías.
publishDate 2011
dc.date.none.fl_str_mv 2011
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/316426
url http://hdl.handle.net/10261/316426
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de A Coruña
https://www.int-res.com/abstracts/meps/v437/p13-26/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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