Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins

Autores
Krock, Bernd; Borel, Claudia Marcela; Barrera, Facundo Matías; Tillman, Urban; Fabro Cerreia Fus, Elena Inés; Almandoz, Gastón Osvaldo; Ferrario, Martha Elba; Garzon Cardona, John Edison; Koch, Boris Peter; Alonso, Cecilia; Lara, Rubén Jose
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The overlay of cooler nutrient enriched Beagle–Magellan water with warmer nutrient depleted shelf water and a strong stratification of the water column in the San Jorge Gulf region, Argentina, coincided with relatively high dinoflagellate abundances in April 2012, up to 34,000 cells L− 1. This dinoflagellate proliferation was dominated by Ceratium spp., but environmental conditions also favored to a lesser amount the occurrence of toxigenic dinoflagellates, such as Alexandrium tamarense and Protoceratium reticulatum, whose toxins were hardly detected in any other areas along the expedition transect of the R/V Puerto Deseado between 38 and 56°S (Ushuaia–Mar del Plata) in March/April 2012. Generally vegetative cells of A. tamarense and P. reticulatum co-occurred with their respective phycotoxins in the water column and their cysts in the upper sediment layers. Two strains of A. tamarense were isolated from the bloom sample and morphologically characterized. Their PSP toxin profiles consisted of C1/2, gonyautoxins 1/4 and to a lesser amount of neosaxitoxin and confirmed earlier data from this region. The ratios between autotrophic picoplankton and heterotrophic bacteria were higher in shelf waters in the north than in Beagle–Magellan waters in the south of San Jorge Gulf.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
Materia
Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/100402

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network_name_str SEDICI (UNLP)
spelling Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxinsKrock, BerndBorel, Claudia MarcelaBarrera, Facundo MatíasTillman, UrbanFabro Cerreia Fus, Elena InésAlmandoz, Gastón OsvaldoFerrario, Martha ElbaGarzon Cardona, John EdisonKoch, Boris PeterAlonso, CeciliaLara, Rubén JoseCiencias NaturalesCold water massesSouthwest atlanticPlanktonic communityToxinsDinoflagellate bloomsAlexandrium tamarenseProtoceratium reticulatumThe overlay of cooler nutrient enriched Beagle–Magellan water with warmer nutrient depleted shelf water and a strong stratification of the water column in the San Jorge Gulf region, Argentina, coincided with relatively high dinoflagellate abundances in April 2012, up to 34,000 cells L− 1. This dinoflagellate proliferation was dominated by Ceratium spp., but environmental conditions also favored to a lesser amount the occurrence of toxigenic dinoflagellates, such as Alexandrium tamarense and Protoceratium reticulatum, whose toxins were hardly detected in any other areas along the expedition transect of the R/V Puerto Deseado between 38 and 56°S (Ushuaia–Mar del Plata) in March/April 2012. Generally vegetative cells of A. tamarense and P. reticulatum co-occurred with their respective phycotoxins in the water column and their cysts in the upper sediment layers. Two strains of A. tamarense were isolated from the bloom sample and morphologically characterized. Their PSP toxin profiles consisted of C1/2, gonyautoxins 1/4 and to a lesser amount of neosaxitoxin and confirmed earlier data from this region. The ratios between autotrophic picoplankton and heterotrophic bacteria were higher in shelf waters in the north than in Beagle–Magellan waters in the south of San Jorge Gulf.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnicas2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf86-100http://sedici.unlp.edu.ar/handle/10915/100402enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/16633info:eu-repo/semantics/altIdentifier/issn/0924-7963info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2015.01.006info:eu-repo/semantics/altIdentifier/hdl/11336/16633info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:55Zoai:sedici.unlp.edu.ar:10915/100402Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:55.654SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
title Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
spellingShingle Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
Krock, Bernd
Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
title_short Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
title_full Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
title_fullStr Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
title_full_unstemmed Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
title_sort Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
dc.creator.none.fl_str_mv Krock, Bernd
Borel, Claudia Marcela
Barrera, Facundo Matías
Tillman, Urban
Fabro Cerreia Fus, Elena Inés
Almandoz, Gastón Osvaldo
Ferrario, Martha Elba
Garzon Cardona, John Edison
Koch, Boris Peter
Alonso, Cecilia
Lara, Rubén Jose
author Krock, Bernd
author_facet Krock, Bernd
Borel, Claudia Marcela
Barrera, Facundo Matías
Tillman, Urban
Fabro Cerreia Fus, Elena Inés
Almandoz, Gastón Osvaldo
Ferrario, Martha Elba
Garzon Cardona, John Edison
Koch, Boris Peter
Alonso, Cecilia
Lara, Rubén Jose
author_role author
author2 Borel, Claudia Marcela
Barrera, Facundo Matías
Tillman, Urban
Fabro Cerreia Fus, Elena Inés
Almandoz, Gastón Osvaldo
Ferrario, Martha Elba
Garzon Cardona, John Edison
Koch, Boris Peter
Alonso, Cecilia
Lara, Rubén Jose
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
topic Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
dc.description.none.fl_txt_mv The overlay of cooler nutrient enriched Beagle–Magellan water with warmer nutrient depleted shelf water and a strong stratification of the water column in the San Jorge Gulf region, Argentina, coincided with relatively high dinoflagellate abundances in April 2012, up to 34,000 cells L− 1. This dinoflagellate proliferation was dominated by Ceratium spp., but environmental conditions also favored to a lesser amount the occurrence of toxigenic dinoflagellates, such as Alexandrium tamarense and Protoceratium reticulatum, whose toxins were hardly detected in any other areas along the expedition transect of the R/V Puerto Deseado between 38 and 56°S (Ushuaia–Mar del Plata) in March/April 2012. Generally vegetative cells of A. tamarense and P. reticulatum co-occurred with their respective phycotoxins in the water column and their cysts in the upper sediment layers. Two strains of A. tamarense were isolated from the bloom sample and morphologically characterized. Their PSP toxin profiles consisted of C1/2, gonyautoxins 1/4 and to a lesser amount of neosaxitoxin and confirmed earlier data from this region. The ratios between autotrophic picoplankton and heterotrophic bacteria were higher in shelf waters in the north than in Beagle–Magellan waters in the south of San Jorge Gulf.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
description The overlay of cooler nutrient enriched Beagle–Magellan water with warmer nutrient depleted shelf water and a strong stratification of the water column in the San Jorge Gulf region, Argentina, coincided with relatively high dinoflagellate abundances in April 2012, up to 34,000 cells L− 1. This dinoflagellate proliferation was dominated by Ceratium spp., but environmental conditions also favored to a lesser amount the occurrence of toxigenic dinoflagellates, such as Alexandrium tamarense and Protoceratium reticulatum, whose toxins were hardly detected in any other areas along the expedition transect of the R/V Puerto Deseado between 38 and 56°S (Ushuaia–Mar del Plata) in March/April 2012. Generally vegetative cells of A. tamarense and P. reticulatum co-occurred with their respective phycotoxins in the water column and their cysts in the upper sediment layers. Two strains of A. tamarense were isolated from the bloom sample and morphologically characterized. Their PSP toxin profiles consisted of C1/2, gonyautoxins 1/4 and to a lesser amount of neosaxitoxin and confirmed earlier data from this region. The ratios between autotrophic picoplankton and heterotrophic bacteria were higher in shelf waters in the north than in Beagle–Magellan waters in the south of San Jorge Gulf.
publishDate 2015
dc.date.none.fl_str_mv 2015-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/100402
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info:eu-repo/semantics/altIdentifier/issn/0924-7963
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2015.01.006
info:eu-repo/semantics/altIdentifier/hdl/11336/16633
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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