General Information

Event name: ES-99-004
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
Event occurred before in this location: Yes (Since 1995.)
Individuals to contact: GARCÉS, Esther

Location & Date

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Location: Latitude: 41.833333, Longitude: 3.000000
General location information: La Fosca., Catalonia, NE Spain.
HAB Area code(s): ES-22
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1999-08-02
Start: 1999-06-20, End: 1999-09-10
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: 2/8/99 Corresponding to the maximum cell concentration recorded for the causative species


Causative organism known: Yes
Causative Species/Genus: Alexandrium taylorii (2 x (10)6 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: Max 81 µg/L Chlª. µg/l
Additional bloom information: Dinophyceae, pyrropyta. Temporary cysts in the sediment 5.96 cysts (10)6/(m)2xd
Event-related bibliography: Garcés, E. (1998) Proliferacions de dinoflagel.lades a la Costa Catalana: estudi del creixement in situ i adaptacions per al manteniment. PhD Thesis. Universitat de Barcelona.Garcés, E., Delgado, M., Maso, M. and Camp, J. (1998) Life history and in situ growth rates of Alexandrium taylori (Dinophyceae, Pyrrophyta). J. Phycol. 34, 880-887.Garces, E., Maso, M. and Camp, J. (1999) A recurrent and localized dinoflagellate bloom in Mediterranean beach. J. Plankton Res. 21, 2373-2391.

Environmental Conditions

Weather: Summer Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity: 1
Temperature (°C): 27 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 37 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 27 °C, Min: 22 °C
Salinity Range During Event: Max: 37, Min: 27
Bloom location in the water column:
Growth Comments Moderate growth rates and low diffusion rates
Additional Environmental information: At surface in the light hours. On the sediment in the dark time. Wind velocity: 1m/s.

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: Indirect losses for the tourist industry.
Management decision:
Additional harmful effect information: Evident deterioration in the quality of water for recreational uses.