General Information

Event name: SE-20-003
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 (SMHI Baltic Algae Watch System - satellite observations of cyanobacteria surface accumulations)
Event occurred before in this location: Yes (Last time in 2018, before that in 2006)
Individuals to contact: KARLSON, Bengt

Location & Date

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Location: Latitude: , Longitude:
General location information: Swedish parts of the Kattegat and the Skagerrak,
HAB Area code(s): SE-07 SE-08
Additional location information: Surface accumulations with Nodularia spumigena confirmed 10 August 2020 Nordreviken, Askims fjord, Västra Götaland 12 August 2020 Säby Kile, Tjörn, Västra Götaland 17 August Kuggaviken near Åsa, Kungsbackafjorden, Halland.
Bloom event dates (yyyy/mm/dd): Event Date:2020-08-10
Start: 2020-08-09, End: 2020-08-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Nodularia spumigena ( cells/L)
Confirmed by microscope analyses
Co-Ocurring Species/Genus:
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: Whole column
Growth: Advected
Growth Comments Cyanobacteria were most likely advected from the Baltic Sea
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:
Additional harmful effect information:
Created at 01:16 on 3 May 2021
Updated at 10:55 on 4 May 2021