On the variation of alkalinity during phytoplankton photosynthesis

On the variation of alkalinity during phytoplankton photosynthesis

The alkalinity of the organic constituents of marine phytoplankton and their participation in the total alkalinity (TA) change of seawater during photosynthesis are carefully assessed. Quantification of the contribution of phytoplankton chlorophyll, proteins and phosphorus compounds to the hydrogen...

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Autores principales: Fraga, F, Álvarez-Salgado, XA
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2005
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/26
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spelling oai:cienciasmarinas.com.mx:article-262019-04-04T23:00:17Z On the variation of alkalinity during phytoplankton photosynthesis Variación de la alcalinidad durante la fotosíntesis del fitoplancton marino Fraga, F Álvarez-Salgado, XA total alcalinity carbon cycling phytoplankton primary production mineralization alcalinidad total ciclo del carbono fitoplancton producción primaria mineralización The alkalinity of the organic constituents of marine phytoplankton and their participation in the total alkalinity (TA) change of seawater during photosynthesis are carefully assessed. Quantification of the contribution of phytoplankton chlorophyll, proteins and phosphorus compounds to the hydrogen ion balance of seawater in terms of total inorganic nitrogen (∆[NT] = ∆NH4 +] + ∆[N2] + ∆[NO2–] + ∆[NO3–]) and total inorganic phosphorus (∆[PT]) changes during photosynthesis yielded that the organic components of marine phytoplankton are alkaline by –0.06 ×  ∆[NT] – 0.49 × ∆[PT], and that the potential total alkalinity (TAP) during photosynthesis is TAP = TA – [NH4– + 0.93 × [NO2–] + [NO3–] + 0.08 × [NT] + 0.23 × [PT] for unfiltered seawater samples and TAP = TA – [NH4–] + 0.93 × [NO2–] + [NO3–] + 0.02 × [NT] + 0.26 × [PT] for filtered seawater samples. These equations correct the traditionally used expression TAP = TA + [NO3–]. The TAP anomalies are produced, in order of increasing importance, by N2 fixation, DMSP production and CaCO3 fixation. En este artículo se estima la alcalinidad de los compuestos orgánicos producidos por el fitoplancton marino y su contribución al cambio de alcalinidad total (TA) del agua de mar durante la fotosíntesis. Tras cuantificar la contribución de los pigmentos fotosintéticos, las proteínas y los compuestos de fósforo al balance de H+ del agua de mar referida a las variaciones de nitrógeno inorgánico (∆[NT] = ∆NH4 +] + ∆[N2] + ∆[NO2–] + ∆[NO3–]) y fósforo inorgánico (∆[PT]]) totales durante la fotosíntesis, se obtiene que los constituyentes orgánicos del fitoplancton marino tienen una alcalinidad de–0.06 ×  ∆[NT] – 0.49 × ∆[PT], y que la alcalinidad potencial (TAP) durante la fotosíntesis es TAP = TA – [NH4– + 0.93 × [NO2–] + [NO3–] + 0.08 × [NT] + 0.23 × [PT] para muestras no filtradas y TAP = TA – [NH4–] + 0.93 × [NO2–] + [NO3–] + 0.02 × [NT] + 0.26 × [PT] para muestras filtradas. Estas expresiones corrigen la ecuación tradicional de TAP = TA + [NO3–]. Procesos tales como la fijación de N2, la producción de DMSP y, sobre todo, la síntesis de CaCO3, producen desviaciones crecientes en el comportamiento conservativo de la TAP. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/26 10.7773/cm.v31i4.26 Ciencias Marinas; Vol. 31 No. 4 (2005); 627-639 Ciencias Marinas; Vol. 31 Núm. 4 (2005); 627-639 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/26/11
institution Ciencias Marinas
collection OJS
language eng
format Online
author Fraga, F
Álvarez-Salgado, XA
spellingShingle Fraga, F
Álvarez-Salgado, XA
On the variation of alkalinity during phytoplankton photosynthesis
author_facet Fraga, F
Álvarez-Salgado, XA
author_sort Fraga, F
title On the variation of alkalinity during phytoplankton photosynthesis
title_short On the variation of alkalinity during phytoplankton photosynthesis
title_full On the variation of alkalinity during phytoplankton photosynthesis
title_fullStr On the variation of alkalinity during phytoplankton photosynthesis
title_full_unstemmed On the variation of alkalinity during phytoplankton photosynthesis
title_sort on the variation of alkalinity during phytoplankton photosynthesis
description The alkalinity of the organic constituents of marine phytoplankton and their participation in the total alkalinity (TA) change of seawater during photosynthesis are carefully assessed. Quantification of the contribution of phytoplankton chlorophyll, proteins and phosphorus compounds to the hydrogen ion balance of seawater in terms of total inorganic nitrogen (∆[NT] = ∆NH4 +] + ∆[N2] + ∆[NO2–] + ∆[NO3–]) and total inorganic phosphorus (∆[PT]) changes during photosynthesis yielded that the organic components of marine phytoplankton are alkaline by –0.06 ×  ∆[NT] – 0.49 × ∆[PT], and that the potential total alkalinity (TAP) during photosynthesis is TAP = TA – [NH4– + 0.93 × [NO2–] + [NO3–] + 0.08 × [NT] + 0.23 × [PT] for unfiltered seawater samples and TAP = TA – [NH4–] + 0.93 × [NO2–] + [NO3–] + 0.02 × [NT] + 0.26 × [PT] for filtered seawater samples. These equations correct the traditionally used expression TAP = TA + [NO3–]. The TAP anomalies are produced, in order of increasing importance, by N2 fixation, DMSP production and CaCO3 fixation.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/26
_version_ 1715723926044147712

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