General Information

Event name: SE-20-002
Country: SWEDEN
Nature of the harmful event:
Water Discoloration , 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 (Yes (SMHI Baltic Algae Watch System - satellite observations of cyanobacteria surface accumulations))
Event occurred before in this location: Yes
Individuals to contact: KARLSON, Bengt

Location & Date

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Location: Latitude: , Longitude:
General location information: Baltic Proper and Bothnian Sea, Baltic Sea,
HAB Area code(s): SE-02 SE-03 SE-04 SE-05 SE-06
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2020-07-24
Start: 2020-06-14, End: 2020-08-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: First observations in SE Baltic June 9th


Causative organism known: Yes
Causative Species/Genus: Aphanizomenon flos-aquae ( cells/L)
Co-Ocurring Species/Genus: Dolichospermum spp. ( cells/L)
Nodularia spumigena ( 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:
Economic losses:
Management decision: Warnings to the public issued by the Swedish Information Centre of the Baltic Proper and the Information Centre for the Gulf of Bothnia
Additional harmful effect information:
Created at 01:11 on 3 May 2021
Updated at 04:21 on 3 May 2021