Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity
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Redalyc · Ciencias Marinas
Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide between September 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south of Portugal. The water sampling and the in situ observations were d...
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Autónoma de Baja California
2003
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| _version_ | 1878325298406096896 |
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| author | Manuela Falcão |
| author_facet | Manuela Falcão |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity Manuela Falcão Carlos Vale Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide betweenSeptember 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south ofPortugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at lowtide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibiteda clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM ofnitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll aincreases (up to 2 µg g-1) point to a rapid biological consumption of the imported nutrients. Differences of temperature betweencoastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of thelagoon. The primary productivity varied from 2 mg C m3 h1 (winter) to 30 mg C m3 h1 (summer), reflecting the intensive 14Cincorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring,when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029406 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/173 10.7773/cm.v29i4.173 |
| description | Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide between September 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south of Portugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at low tide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibited a clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM of nitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll a increases (up to 2 µg g–1) point to a rapid biological consumption of the imported nutrients. Differences of temperature between coastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of the lagoon. The primary productivity varied from 2 mg C m–3 h–1 (winter) to 30 mg C m–3 h–1 (summer), reflecting the intensive 14C incorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring, when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide.
Se monitorearon silicatos, nitratos, fosfatos, clorofila a y productividad primaria en mareas altas y bajas entre septiembre de 1985 y septiembre de 1986, en cuatro estaciones en la Ría Formosa, una laguna costera meso-mareal localizada en el sur de Portugal. Las muestras de agua y las observaciones in situ se realizaron en mareas muertas y vivas, de forma alternada. Mientras que durante la marea baja los silicatos excedieron los valores obtenidos en marea alta durante todo el año, estableciéndose una débil tendencia estacional, los nitratos y fosfatos mostraron una notoria variación estacional durante la pleamar de las mareas vivas. Los máximos pronunciados en el periodo de bajas temperaturas (inicios de primavera), de 7∞M para nitratos y 3 ∞M para fosfatos, indican su advección desde la zona costera contigua. Los valores menores durante la marea baja y el incremento en la clorofila a (hasta 2 mg g–1), señalan un rápido consumo biológico de los nutrientes importados. Las diferencias de temperatura entre las aguas costeras, y las de la laguna al inicio de la primavera, promueven un consumo más eficiente entre los productores primarios de la laguna. La productividad primaria varió de 2 mg C m–3 h–1 (invierno) a 30 mg C m–3 h–1 (verano), reflejando una intensa incorporación de 14C durante los periodos cálidos. Se pudo observar una elevada tasa de consumo de nitratos y fosfatos durante la primavera, cuando las concentraciones disminuyeron en un 50% dentro de un corto período de 6 horas entre pleamar y bajamar. |
| format | Artículo científico |
| id | redalyc_48029406 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): The importance of lagoon–sea water exchanges on the biological productivity Dinámica de nutrientes en una laguna costera (Ría Formosa, Portugal): La importancia del intercambio de agua laguna–mar en la productividad biológica Falcao, M Vale, C Coastal lagoon nutrients chlorophyll primary productivity lagoon-sea exchanges Laguna costera nutrientes clorofila productividad primaria intercambios laguna-mar Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide between September 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south of Portugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at low tide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibited a clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM of nitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll a increases (up to 2 µg g–1) point to a rapid biological consumption of the imported nutrients. Differences of temperature between coastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of the lagoon. The primary productivity varied from 2 mg C m–3 h–1 (winter) to 30 mg C m–3 h–1 (summer), reflecting the intensive 14C incorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring, when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide. Se monitorearon silicatos, nitratos, fosfatos, clorofila a y productividad primaria en mareas altas y bajas entre septiembre de 1985 y septiembre de 1986, en cuatro estaciones en la Ría Formosa, una laguna costera meso-mareal localizada en el sur de Portugal. Las muestras de agua y las observaciones in situ se realizaron en mareas muertas y vivas, de forma alternada. Mientras que durante la marea baja los silicatos excedieron los valores obtenidos en marea alta durante todo el año, estableciéndose una débil tendencia estacional, los nitratos y fosfatos mostraron una notoria variación estacional durante la pleamar de las mareas vivas. Los máximos pronunciados en el periodo de bajas temperaturas (inicios de primavera), de 7∞M para nitratos y 3 ∞M para fosfatos, indican su advección desde la zona costera contigua. Los valores menores durante la marea baja y el incremento en la clorofila a (hasta 2 mg g–1), señalan un rápido consumo biológico de los nutrientes importados. Las diferencias de temperatura entre las aguas costeras, y las de la laguna al inicio de la primavera, promueven un consumo más eficiente entre los productores primarios de la laguna. La productividad primaria varió de 2 mg C m–3 h–1 (invierno) a 30 mg C m–3 h–1 (verano), reflejando una intensa incorporación de 14C durante los periodos cálidos. Se pudo observar una elevada tasa de consumo de nitratos y fosfatos durante la primavera, cuando las concentraciones disminuyeron en un 50% dentro de un corto período de 6 horas entre pleamar y bajamar. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2003-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/173 10.7773/cm.v29i4.173 Ciencias Marinas; Vol. 29 No. 4 (2003); 425-433 Ciencias Marinas; Vol. 29 Núm. 4 (2003); 425-433 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/173/148 ['Redalyc'] redalyc_48029406 Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity ['Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoon\x96sea water exchanges on the biological productivity', 'Manuela Falcão', 'Ciencias de la Tierra', 'lagoon', 'nutrients', 'chlorophyll', 'sea exchanges', 'Coastal lagoon', 'Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoon\x96sea water exchanges on the biological productivity Manuela Falcão Carlos Vale Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide betweenSeptember 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south ofPortugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at lowtide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibiteda clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM ofnitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll aincreases (up to 2 µg g-1) point to a rapid biological consumption of the imported nutrients. Differences of temperature betweencoastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of thelagoon. The primary productivity varied from 2 mg C m\x963 h\x961 (winter) to 30 mg C m\x963 h\x961 (summer), reflecting the intensive 14Cincorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring,when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029406 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29'] ['Manuela Falcão'] ['Manuela Falcão'] ['Artículo científico'] ['2003'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'lagoon', 'nutrients', 'chlorophyll', 'sea exchanges', 'Coastal lagoon'] ['https://www.redalyc.org/articulo.oa?id=48029406'] ['Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoon\x96sea water exchanges on the biological productivity Manuela Falcão Carlos Vale Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide betweenSeptember 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south ofPortugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at lowtide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibiteda clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM ofnitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll aincreases (up to 2 µg g-1) point to a rapid biological consumption of the imported nutrients. Differences of temperature betweencoastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of thelagoon. The primary productivity varied from 2 mg C m\x963 h\x961 (winter) to 30 mg C m\x963 h\x961 (summer), reflecting the intensive 14Cincorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring,when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029406 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29'] |
| spellingShingle | Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity Manuela Falcão Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity Manuela Falcão Carlos Vale Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon Silicates, nitrates, phosphates, chlorophyll a and primary productivity were monitored at low and high tide betweenSeptember 1985 and September 1986, at four stations in Ria Formosa, a meso-tidal coastal lagoon located in the south ofPortugal. The water sampling and the in situ observations were done alternatively in neap and spring tide. While silicates at lowtide exceeded values at high tide thorughout the year and a weak seasonal trend was discerned, nitrates and phosphates exhibiteda clear-cut seasonal variation at high spring tide. Pronounced maxima in the period of low temperatures (early spring), 7 µM ofnitrates and 3 µM of phosphates, indicate their import from the adjacent coastal zone. Lower values at low tide and chlorophyll aincreases (up to 2 µg g-1) point to a rapid biological consumption of the imported nutrients. Differences of temperature betweencoastal waters and those of the lagoon in early spring account for the more efficient consumption by the primary producers of thelagoon. The primary productivity varied from 2 mg C m3 h1 (winter) to 30 mg C m3 h1 (summer), reflecting the intensive 14Cincorporation during the warmer period. High rates of nitrates and phosphates consumption could be observed during spring,when their concentrations decreased 50% within a narrow period of 6 hours from high to low tide. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029406 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29 |
| title | Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): the importance of lagoonsea water exchanges on the biological productivity |
| title_alt | Dinámica de nutrientes en una laguna costera (Ría Formosa, Portugal): La importancia del intercambio de agua laguna–mar en la productividad biológica Nutrient dynamics in a coastal lagoon (Ria Formosa, Portugal): The importance of lagoon–sea water exchanges on the biological productivity |
| topic | Ciencias de la Tierra lagoon nutrients chlorophyll sea exchanges Coastal lagoon |
| topic_facet | Coastal lagoon nutrients chlorophyll primary productivity lagoon-sea exchanges Laguna costera nutrientes clorofila productividad primaria intercambios laguna-mar |
| url | https://www.redalyc.org/articulo.oa?id=48029406 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/173 |