General Information

Event name: FI-09-001
Country: FINLAND
Nature of the harmful event:
Event directly affected:
Toxicity detected: Yes (Approximate range: PSP toxins (GTX2, GTX3, STX) max. 2.3 µg/L)
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (But, toxicity has not been measured before)
Individuals to contact: LEHTINEN, Sirpa

Location & Date

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Location: Latitude: 60.083056, Longitude: 20.533056
General location information: Föglö, Åland archipelago, Baltic Sea
HAB Area code(s): FI-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2009-08-10
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: PSP toxins were found from May to September, maximum toxicity was on 10.8.2009.


Causative organism known: Yes
Causative Species/Genus: Alexandrium ostenfeldii (Paulsen) Balech et Tangen 1985 (160 000 cells/L)
Maximum cell concentration 170 000 cells/L occured 26.7.2009
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Hakanen Päivi, Suikkanen Sanna, Franzén Johan, Franz+en Helene, Kankaanpää Harri and Kremp Anke: Bloom and toxin dynamics of Alexandrium ostenfeldii in a shallow embayment at the SW coast of Finland, northern Baltic Sea (accepted 12/2011 to be published in Harmful Algae)

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): ca. 20 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event: Max: 6, Min: 6
Bloom location in the water column: Whole column
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Alexandrium ostenfeldii Saxitoxins GTX3 2.3 µg/L LC
Kit used: Type of kit used:
Additional information: HPLC
Economic losses:
Management decision:
Additional harmful effect information:
Updated at 12:52 on 5 Nov 2019