General Information

Event name: BE-18-001
Country: BELGIUM
Nature of the harmful event:
Water Discoloration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes (Skin rash on surfers)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: De Rijcke, Maarten

Location & Date

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Location: Latitude: 51.230556, Longitude: 2.951667
General location information: Spuikom, Ostend Harbor
HAB Area code(s): BE-01
Additional location information: Artificial, shallow lagoon with reduced tide.
Bloom event dates (yyyy/mm/dd): Event Date:2018-08-22
Start: 2018-08-17, End: 2018-08-23
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Event terminated by flushing


Causative organism known: Yes
Causative Species/Genus: Mesodinium rubrum ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Also notable presence of Anabaenopsis sp., Planktothrix agardhii and Anabaena compacta.
Event-related bibliography: ICES, 2019. Report of the Working Group on Harmful Algal Bloom Dynamics (WGHABD),2-4 April 2019, Oslo, Norway.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): 0 Wind velocity:
Temperature (°C): 22 Oxygen saturation %: 0 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: Local surf and sailing clubs suffered economic losses.
Management decision: Area was closed for recreation. Sport event was cancelled.
Additional harmful effect information:
Created at 04:49 on 6 Mar 2020
Updated at 04:52 on 6 Mar 2020