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

dc.creatorKrock, Bernd
dc.creatorBorel, Claudia Marcela
dc.creatorBarrera, Facundo Matías
dc.creatorTillman, Urban
dc.creatorFabro Cerreia Fus, Elena Inés
dc.creatorAlmandoz, Gastón Osvaldo
dc.creatorFerrario, Martha Elba
dc.creatorGarzon Cardona, John Edison
dc.creatorKoch, Boris Peter
dc.creatorAlonso, Cecilia
dc.creatorLara, Rubén Jose
dc.date2015-01
dc.date2020-07-10T18:04:39Z
dc.date.accessioned2023-07-14T20:31:09Z
dc.date.available2023-07-14T20:31:09Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/100402
dc.identifierhttps://ri.conicet.gov.ar/11336/16633
dc.identifierissn:0924-7963
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7439555
dc.descriptionThe 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.
dc.descriptionFacultad de Ciencias Naturales y Museo
dc.descriptionConsejo Nacional de Investigaciones Científicas y Técnicas
dc.formatapplication/pdf
dc.format86-100
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Naturales
dc.subjectCold water masses
dc.subjectSouthwest atlantic
dc.subjectPlanktonic community
dc.subjectToxins
dc.subjectDinoflagellate blooms
dc.subjectAlexandrium tamarense
dc.subjectProtoceratium reticulatum
dc.titleHydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
dc.typeArticulo
dc.typeArticulo


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