General Information

Event name: NL-92-024
Nature of the harmful event:
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: JOORDENS, J. C. A.

Location & Date

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Location: Latitude: , Longitude:
General location information: , WADDEN SEA.
HAB Area code(s): NL-01
Additional location information: Stations: W420, W590, W30 & E250.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: late March-October.


Causative organism known: Yes
Causative Species/Genus: Phaeocystis pouchetii (6,000 - 13 cells/L)
E250 station from May till end September
Phaeocystis pouchetii (50,000,000 cells/L)
W30 station end of May
Phaeocystis pouchetii (160,000 - cells/L)
W30 Station from March till November
Phaeocystis pouchetii (15,000,000 cells/L)
W420 station in june
Phaeocystis pouchetii (160,000 - cells/L)
W420 station March-Ocyober
Phaeocystis pouchetii (18,00,000 cells/L)
E250 station end of May
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The same pattern as in W420 station was encountered at W590 station though without the June bloom.
Event-related bibliography: Koeman, R & M. Rademaker, 1993. Biomonitoring van fytoplankton in de Nederlandse zoute en brakke wateren 1992. TRIPOS Rijswijk/Haren (in Duth with English summary). Rademaker, M & R. Koeman, 1993. Determinatie fytoplankton in het Nederlandse deel van de Noordzee en het Kanaal, Project Algenbloei 1992. Report North Sea derectorate (In Dutch). Peperzak, L, 1994. Plaagalgen in de Noorszee. Report DGW-93.053, National Institute fos coastal and Marine Management/RIKZ, The Haghe (in Dutch).

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
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:
Additional harmful effect information:
Updated at 04:16 on 28 Feb 2018