General Information

Event name: EE-99-001
Country: ESTONIA
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: 65.9-160.7 g Nodularin in ~10 L water.)
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Estonian Marine Monitoring.)
Event occurred before in this location: Yes (Yearly phenomenon.)
Individuals to contact: JAANUS, Andres , KANOSHINA, Inga

Location & Date

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Location: Latitude: 59.765000, Longitude: 25.000000
General location information: Baltic Sea., Central Gulf of Finland.
HAB Area code(s): EE-03
Additional location information: Tallinn Bay, Southern Gulf of Finland. Area 32.
Bloom event dates (yyyy/mm/dd): Start: 1999-07-14, End: 1999-08-06
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Nodularia spumigena (~2 million cells/L)
100 m filaments per litre.
Co-Ocurring Species/Genus: Anabaena sp. (100,000 cells/L)
100,000 / 100 m filaments per litre.
Chlorophyll concentration, if known: 42.8 mg/m3 Chl a (Maximum, July 14, Tallin Ba µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Calm and sunny. Turbidity (NTU): 2.5 Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): 19 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 5.6 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 21 °C, Min: 16 °C
Salinity Range During Event: Max: 6, Min: 5
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Surface layer bloom, 0-5 m. Wind direction: W - SW.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Nodularia spumigena Nodularins Nodularin 65.9-160.7 g / ~10 LC
Kit used: Type of kit used:
Additional information: HPLC analysed by Clive Ward, Dundee University, Scotland.
Economic losses:
Management decision:
Additional harmful effect information:
Updated at 03:00 on 2 Dec 2019