General Information

Event name: FI-93-001
Country: FINLAND
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome: Cyanobacterial toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Extensive cyanobacterial blooms were previously observed in the area in 1992.)
Individuals to contact: RANTAJÄRVI, Eija

Location & Date

Location: Latitude: , Longitude:
General location information: Gulf of Finland and Bothnian Sea.,
HAB Area code(s):
Additional location information: Large areas in the open western Gulf of Finland and the Bothnian Sea. Some minor areas in the northern parts of the eastern Gulf of Finland.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: July-September.


Causative organism known: Yes
Causative Species/Genus: Nodularia spumigena ( cells/L)
Aphanizomenon flos-aquae ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Nodularia spumigena (hepatotoxic) and Aphanizomenon flos-aquae were the dominant species.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments In situ population in the sea area.
Additional Environmental information:

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:
Management decision: Media informed
Additional harmful effect information:
Updated at 06:49 on 15 Dec 2019