General Information

Event name: PL-20-001
Country: POLAND
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (ocasionally)
Individuals to contact: Mazur-Marzec, Hanna , Kobos, Justyna

Location & Date

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Location: Latitude: , Longitude:
General location information: Gulf of Gdańsk, Southern Baltic Sea
HAB Area code(s): PL-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2020-06-26
Start: 2020-06-19, End: 2020-06-28
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Nodularia spumigena (0.60 (100 um filaments/L) cells/L)
biomass 5.61 mg/L
Co-Ocurring Species/Genus: Aphanizomenon flos-aquae (1.25 mln (100 um filaments/L) cells/L)
biomass 2.46 mg/L
Dolichospermum spp. (0.11 mln (100 um filaments/L) cells/L)
biomass 0.21 mg/L
Chlorophyll concentration, if known: µg/l
Additional bloom information: At the same time in the inner part of Gulf of Gdańsk, floating near the surface cyanobacterial blooms were observed with N. spumigena biomass ranging from 2.9 - 2,987.9 mg/L and nodularin (NOD) concentration ranging from 14.86 - 464.75 g/L.
Event-related bibliography:

Environmental Conditions

Weather: warm, calm 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
In situ
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: beaches closed for 1 or 2-3 days in June 2020
Management decision: 5 beaches closed
Additional harmful effect information: warning against swimming in the water with changed color and smell
Created at 09:55 on 2 Apr 2021
Updated at 10:43 on 2 Apr 2021