General Information

Event name: ITA-98-001
Country: ITALY
Nature of the harmful event:
High Phyto concentration , Mass mortalities , Foam/Mucilage in the coast , Other ( )
Event directly affected:
Toxicity detected: No
Associated syndrome: Aerosolized toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: ZINGONE, Adriana , SANSONI, Giuseppe

Location & Date

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Location: Latitude: 44.004722, Longitude: 10.102778
General location information: Massa and Carrara coasts, Tuscany
HAB Area code(s): ITA-015
Additional location information: The Ostreopsis bloom and the benthic animal death were also noticed in the adjacent Ligurian coasts and in the Tuscany archipelagon.
Bloom event dates (yyyy/mm/dd): Event Date:1998-08-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Ostreopsis ovata (3000 - 50000 cells/L cells/L)
Brownish gelatinous layer in the benthos, turbidity and mucilage in the water
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Sansoni, G., Borghini, B., Camici G., Casotti, M., Righini, P. & Rustighi, C. 2003. Fioriture algali di Ostreopsis ovata (Gonyaulacales: Dinophyceae): un problema emergente. Biologia Ambientale 17:17-23

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: underwater rocks were not covered with the usual macroalgae but rather with a reddish-brownish gelatinous which also covered sea urchins and mussels. the colour was produced by high concentrations of O. ovata

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses: not assessed
Management decision:
Additional harmful effect information:
Created at 04:06 on 19 Jul 2019