Phytoplankton photosynthetic parameters from the Gulf of California southern region

Phytoplankton physiologic response in the euphotic zone was determined by photosynthesis-irradiance experiments carried out between June 2000 and June 2001 at Bahia de La Paz, Gulf of California, Mexico. A stratified water column was present, from June to September (stratification index > 200 J m...

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Autores principales:	Verdugo-Díaz,Gerardo, Martínez-López,Aída, Gaxiola-Castro,Gilberto, Valdez-Holguín,José Eduardo
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2012
Materias:	Photosynthetic parameters euphotic zone Gulf of California
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572012000300014
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spelling	oai:scielo:S0718-195720120003000142013-03-26Phytoplankton photosynthetic parameters from the Gulf of California southern regionVerdugo-Díaz,GerardoMartínez-López,AídaGaxiola-Castro,GilbertoValdez-Holguín,José Eduardo Photosynthetic parameters euphotic zone Gulf of California Phytoplankton physiologic response in the euphotic zone was determined by photosynthesis-irradiance experiments carried out between June 2000 and June 2001 at Bahia de La Paz, Gulf of California, Mexico. A stratified water column was present, from June to September (stratification index > 200 J m-3), with the assimilation number (Pm) represented by an average of 3.7 mg C m-3 h-1, while for the period from November through February, the water column was homogeneous (stratification index = 0 J m-3) and the average was 9.2 mg C m-3 h-1. The maximum photosynthetic efficiency at low irradiances (α) of 0.017 mg C m-3 h-1 (µmol quanta m-2 s-1)-1 was the representative average for the stratified period, while 0.063 mg C m-3 h-1 (µmol quanta m-2 s-1)-1 was the corresponding value for the homogeneous period. The photosynthetic parameters (Pm and a) had an increase during mixing conditions, as result of phytoplankton photoacclimation to average irradiance in the euphotic zone. Diatom abundance (Pseudo-nitzschia delicatissima, Chaetoceros compressus and Coscinodiscus perforatus) were related with higher values of Pm, while lowest values of this parameter are associated with the dinoflagellate group. Average values estimated for the light saturation parameter (Ek) were 334, 173 and 91 µmol quanta m-2 s-1 for the surface, 10 and 1% of the euphotic zone, respectively. In general, nanophytoplankton (2-20 µm) dominated the phytoplanktonic community during the period studied.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.47 n.3 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572012000300014en10.4067/S0718-19572012000300014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Photosynthetic parameters euphotic zone Gulf of California
spellingShingle	Photosynthetic parameters euphotic zone Gulf of California Verdugo-Díaz,Gerardo Martínez-López,Aída Gaxiola-Castro,Gilberto Valdez-Holguín,José Eduardo Phytoplankton photosynthetic parameters from the Gulf of California southern region
description	Phytoplankton physiologic response in the euphotic zone was determined by photosynthesis-irradiance experiments carried out between June 2000 and June 2001 at Bahia de La Paz, Gulf of California, Mexico. A stratified water column was present, from June to September (stratification index > 200 J m-3), with the assimilation number (Pm) represented by an average of 3.7 mg C m-3 h-1, while for the period from November through February, the water column was homogeneous (stratification index = 0 J m-3) and the average was 9.2 mg C m-3 h-1. The maximum photosynthetic efficiency at low irradiances (α) of 0.017 mg C m-3 h-1 (µmol quanta m-2 s-1)-1 was the representative average for the stratified period, while 0.063 mg C m-3 h-1 (µmol quanta m-2 s-1)-1 was the corresponding value for the homogeneous period. The photosynthetic parameters (Pm and a) had an increase during mixing conditions, as result of phytoplankton photoacclimation to average irradiance in the euphotic zone. Diatom abundance (Pseudo-nitzschia delicatissima, Chaetoceros compressus and Coscinodiscus perforatus) were related with higher values of Pm, while lowest values of this parameter are associated with the dinoflagellate group. Average values estimated for the light saturation parameter (Ek) were 334, 173 and 91 µmol quanta m-2 s-1 for the surface, 10 and 1% of the euphotic zone, respectively. In general, nanophytoplankton (2-20 µm) dominated the phytoplanktonic community during the period studied.
author	Verdugo-Díaz,Gerardo Martínez-López,Aída Gaxiola-Castro,Gilberto Valdez-Holguín,José Eduardo
author_facet	Verdugo-Díaz,Gerardo Martínez-López,Aída Gaxiola-Castro,Gilberto Valdez-Holguín,José Eduardo
author_sort	Verdugo-Díaz,Gerardo
title	Phytoplankton photosynthetic parameters from the Gulf of California southern region
title_short	Phytoplankton photosynthetic parameters from the Gulf of California southern region
title_full	Phytoplankton photosynthetic parameters from the Gulf of California southern region
title_fullStr	Phytoplankton photosynthetic parameters from the Gulf of California southern region
title_full_unstemmed	Phytoplankton photosynthetic parameters from the Gulf of California southern region
title_sort	phytoplankton photosynthetic parameters from the gulf of california southern region
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572012000300014
work_keys_str_mv	AT verdugodiazgerardo phytoplanktonphotosyntheticparametersfromthegulfofcaliforniasouthernregion AT martinezlopezaida phytoplanktonphotosyntheticparametersfromthegulfofcaliforniasouthernregion AT gaxiolacastrogilberto phytoplanktonphotosyntheticparametersfromthegulfofcaliforniasouthernregion AT valdezholguinjoseeduardo phytoplanktonphotosyntheticparametersfromthegulfofcaliforniasouthernregion
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Phytoplankton photosynthetic parameters from the Gulf of California southern region

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