General Information

Event name: FI-18-001
Country: FINLAND
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome: Cyanobacterial toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Finnish phytoplankton monitoring)
Event occurred before in this location: Yes (A long-lasting and widespread bloom was last observed in 2014)
Individuals to contact: LEHTINEN, Sirpa , SUIKKANEN, Sanna

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Gulf of Finland, Archipelago Sea, Åland Sea, Baltic Sea
HAB Area code(s): FI-04 FI-05 FI-06
Additional location information: Blooms also in Bothnian Sea and N Baltic Proper
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Bloom period: second wk of July - end of Aug


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

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:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information: The bloom was not tested for toxicity. Blooms of Nodularia spumigena in the Baltic Sea are hepatotoxic, and Dolichospermum sp. may also be hepatotoxic. Species identification was done by microscopy.
Economic losses:
Management decision: Media was informed to alert people. The bloom situation was declared exceptional by Finnish environmental authorities and a special task group was appointed for 16.-30.7.2018 to inform media and citizens on up to a daily basis.
Additional harmful effect information:
Created at 03:00 on 5 Nov 2019
Updated at 06:50 on 15 Dec 2019