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

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 dinof...

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Autores principales: 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
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100402
https://ri.conicet.gov.ar/11336/16633
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100402
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
spellingShingle Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
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
Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
topic_facet Ciencias Naturales
Cold water masses
Southwest atlantic
Planktonic community
Toxins
Dinoflagellate blooms
Alexandrium tamarense
Protoceratium reticulatum
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.
format Articulo
Articulo
author 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_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_sort Krock, Bernd
title Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
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
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/100402
https://ri.conicet.gov.ar/11336/16633
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