General Information

Event name: ES-03-024
Country: SPAIN
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (1. STRATEGY EVK3-2001-00046. New strategy of monitoring and management of HABs in the Mediterranean)
Event occurred before in this location: Yes
Individuals to contact: MASO, Mercedes

Location & Date

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Location: Latitude: 39.537222, Longitude: -2.453889
General location information: Mallorca - Calviŕ., Balearic Island.
HAB Area code(s): ES-26
Additional location information: High biomass bloom in frequented beaches. Oter beaches of the island were also affected during summer with lower concentrations
Bloom event dates (yyyy/mm/dd): Start: 2003-05-27, End: 2003-08-08
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus: Alexandrium taylorii (7,000,000 cells/L)
Co-Ocurring Species/Genus: Gymnodinium sp. (3,000,000 cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Basterretxea, G., Garcés, E., Jordi, T., Masó, M., Tintoré, J .Breeze as Alexandrium taylori bloom favoring mechanism in a Mediterranean beach. Estuarine, Coastal and Shelf Science 62:1-12 Garcés, E., Delgado, M., Maso, M., Camp, J. (1998) Life history and in situ growth rates of Alexandrium taylori (Dinophyceae, Pyrrophyta). Journal of Phycology 34: 880-887. Delgado, M., Garcés, E., Vila,M. and Camp,J. (1997) Morphological variability in three populations of the dinoflagellate Alexandrium taylori. Journal of Plankton Research 19, 749-757.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): 27.5 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 32.6 Current Velocity: 0
Nutrient information: AMONIUM: 0.88
Temperature Range During Event: Max: 28 °C, Min: 20 °C
Salinity Range During Event: Max: 38, Min: 31
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: