Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters

Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters

Photosynthesis-irradiance and phytoplankton absorption data from waters of the central Gulf of California, as well as data in the literature, were analyzed in order to propose working averages of the physiological parameters of phytoplankton to estimate primary productivity at large time and space s...

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Главные авторы: Valdez-Holguín, JE, Álvarez-Borrego, S, Trees, CC
Формат: Online
Язык:eng
Опубликовано: Iniversidad Autónoma de Baja California 1999
Online-ссылка:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/732
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spelling oai:cienciasmarinas.com.mx:article-7322019-05-14T20:14:22Z Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters Caracterización estacional y espacial de los parámetros fotosintéticos del fitoplancton del Golfo de California Valdez-Holguín, JE Álvarez-Borrego, S Trees, CC phytoplankton photosynthetic parameters Gulf of California fitoplancton parámetros fotosintéticos Golfo de California Photosynthesis-irradiance and phytoplankton absorption data from waters of the central Gulf of California, as well as data in the literature, were analyzed in order to propose working averages of the physiological parameters of phytoplankton to estimate primary productivity at large time and space scales. Since there is substantial variability within data sets, we conclude that it is not possible at this time to predict fine time- and space-scale variation in photosynthetic parameters. We recommend the following working averages for the whole Gulf of California and for "winter" conditions (surface TºC <22ºC): a surface P*max = 9.6 ± 2.4 mgC mgChl–1 h–1 (assimilation number), with a linear variation between this and 3.7 ± 0.3 at the middle of the euphotic zone (ez), and then a constant value for deeper waters; a single value of α*inc = 0.029 ± 0.004 mgC mgChl–1 h–1 (μmol quanta m–2 s–1)–1 (incubator´ s initial slope); and φmax = 0.06 ± 0.01 molC (mol quanta)–1 (quantum yield of photosynthesis). For "summer" conditions we recommend: a surface P*max = 3.7 ± 0.3, with a linear variation between this and 1.5 ± 0.2 at the middle of the ez, and another linear variation between the latter and 0.4 ± 0.1 at the bottom of the ez; a surface α*inc = 0.013 ± 0.001, with a linear variation between this and 0.001 at the bottom of the ez; and a single value φmax = 0.014 ± 0.002. A procedure is given to correct α*inc for the in situ spectral distribution of light to obtain α*in situ. Se analizaron datos de la relación fotosíntesis/irradiancia y de absorción del fitoplancton del Golfo de California, así como datos publicados, con el objetivo de proponer valores promedio de los parámetros fisiológicos para estimar productividad primaria en escalas grandes de tiempo y espacio. Por el momento no es posible predecir variaciones de los parámetros fotosintéticos en las escalas espaciales y temporales finas. Se recomiendan los siguientes promedios para todo el Golfo de California y para condiciones de "invierno" (TºC superficial <22ºC): un P*max = 9.6 ± 2.4 mgC mgChl–1 h–1 (número de asimilación) superficial, con una variación lineal entre éste y 3.7 ± 0.3 en la mitad de la zona eufótica (ze), y luego un valor constante para aguas más profundas; un solo valor de α*inc = 0.029 ± 0.004 mgC mgChl–1 h–1 (μmol cuanta m–2 s–1)–1 (pendiente inicial de incubador); y φmax = 0.06 ± 0.01 molC (mol cuanta)–1 (eficiencia cuántica de la fotosíntesis). Para condiciones de "verano" se recomiendan: un P*max = 3.7 ± 0.3 superficial, con una variación lineal entre éste y 1.5 ± 0.2 en la mitad de la ze, y otra variación lineal entre la última y 0.4 ± 0.1 en el fondo de la ze; una α*inc = 0.013 ± 0.001 superficial, con una variación lineal entre ésta y 0.001 en el fondo de la ze; y un solo valor φmax = 0.014 ± 0.002. Se presenta un procedimiento para corregir α*inc por la distribución espectral de la luz in situ y obtener α*in situ. Iniversidad Autónoma de Baja California 1999-03-06 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/732 10.7773/cm.v25i4.732 Ciencias Marinas; Vol. 25 No. 4 (1999); 445-467 Ciencias Marinas; Vol. 25 Núm. 4 (1999); 445-467 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/732/659
institution Ciencias Marinas
collection OJS
language eng
format Online
author Valdez-Holguín, JE
Álvarez-Borrego, S
Trees, CC
spellingShingle Valdez-Holguín, JE
Álvarez-Borrego, S
Trees, CC
Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
author_facet Valdez-Holguín, JE
Álvarez-Borrego, S
Trees, CC
author_sort Valdez-Holguín, JE
title Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
title_short Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
title_full Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
title_fullStr Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
title_full_unstemmed Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters
title_sort seasonal and spatial characterization of the gulf of california phytoplankton photosynthetic parameters
description Photosynthesis-irradiance and phytoplankton absorption data from waters of the central Gulf of California, as well as data in the literature, were analyzed in order to propose working averages of the physiological parameters of phytoplankton to estimate primary productivity at large time and space scales. Since there is substantial variability within data sets, we conclude that it is not possible at this time to predict fine time- and space-scale variation in photosynthetic parameters. We recommend the following working averages for the whole Gulf of California and for "winter" conditions (surface TºC <22ºC): a surface P*max = 9.6 ± 2.4 mgC mgChl–1 h–1 (assimilation number), with a linear variation between this and 3.7 ± 0.3 at the middle of the euphotic zone (ez), and then a constant value for deeper waters; a single value of α*inc = 0.029 ± 0.004 mgC mgChl–1 h–1 (μmol quanta m–2 s–1)–1 (incubator´ s initial slope); and φmax = 0.06 ± 0.01 molC (mol quanta)–1 (quantum yield of photosynthesis). For "summer" conditions we recommend: a surface P*max = 3.7 ± 0.3, with a linear variation between this and 1.5 ± 0.2 at the middle of the ez, and another linear variation between the latter and 0.4 ± 0.1 at the bottom of the ez; a surface α*inc = 0.013 ± 0.001, with a linear variation between this and 0.001 at the bottom of the ez; and a single value φmax = 0.014 ± 0.002. A procedure is given to correct α*inc for the in situ spectral distribution of light to obtain α*in situ.
publisher Iniversidad Autónoma de Baja California
publishDate 1999
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/732
_version_ 1715724004191371264

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