Hydrographic conditions and cyst beds in the San Jorge Gulf, Argentina, favour dinoflagellate blooms including toxigenic species and their toxins
- Krock, Bernd
- Borel, Claudia Marcela
- Barrera, Facundo Matías
- Tillman, Urban
- Fabro Cerreia Fus, Elena Ines
- Almandoz, Gaston Osvaldo
- Ferrario, Martha Elba
- Garzon Cardona, John Edison
- Koch, Boris Peter
- Alonso, Cecilia
- Lara, Ruben Jose
DOIAbstract
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. ret...
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