General Information

Event name: PL-18-002
Country: POLAND
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Planktonic life , Natural Fish , Birds , Humans
Toxicity detected: Yes (Approximate range: nodularin 35.000 g/L; microcystins 7.480 ug/L)
Associated syndrome: Cyanobacterial toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (occasionally)
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
HAB Area code(s): PL-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2018-07-24
Start: 2018-07-23, End: 2018-08-02
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Nodularia spumigena Mertens in Jungers 1822 ( cells/L)
587.2 mln (100 m filament/L); biomass 3256.8 mg/L
Dolichospermum spp. ( cells/L)
1110.8 mln (100 m filament/L); biomass 1453.3 mg/L
Co-Ocurring Species/Genus: Aphanizomenon flos-aquae ( cells/L)
102.8 mln (100 m filament/L); biomass 201.8 mg/L
Chlorophyll concentration, if known: µg/l
Additional bloom information: Phytoplankton community was dominated by long, straight filaments of N. spumigena. At the end of the bloom, the contribution of cyanobacteria from Dolichospermum genus significantly increased (to 50% of total phytoplankton biomass).
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
Growth: Advected
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Nodularia spumigena Nodularins Nodularin 35,000.0 g/L LC-MS
Dolichospermum spp. Microcystins MC-LR 6,640.0 g LC-MS
Dolichospermum spp. Microcystins MC-RR 840.0 g/L LC-MS
Kit used: Type of kit used:
Additional information:
Economic losses: beaches closed for 10-12 days in July-August 2018
Management decision: 28 beaches closed
Additional harmful effect information: warning against swimming in the water with changed color and smell
Created at 08:45 on 25 Jun 2019
Updated at 06:18 on 15 Dec 2019