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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/100402
Ver los metadatos del registro completo
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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 http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/100402 |
url |
http://sedici.unlp.edu.ar/handle/10915/100402 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/16633 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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openAccess |
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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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