General Information

Event name: NL-12-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Other Terrestrial
Toxicity detected: Yes (Approximate range: 2-4 mg STX /kg in intestine (solid), 5.4ug/l in liquid fraction.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: POELMAN, Marnix

Location & Date

[View larger map]
Location: Latitude: 51.624167, Longitude: 3.990000
General location information: Ouwerkerkse kreek, Oosterscheldt
HAB Area code(s): NL-03
Additional location information: Creek for run off water of Agricultural use
Bloom event dates (yyyy/mm/dd): Event Date:2012-07-28
Start: 2012-07-15, End: 2012-09-23
Quarantine levels dates (yyyy/mm/dd): First detection: 2012-08-02, End: 2012-09-23
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium ostenfeldii (13000000 cells/L)
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: 21 °C, Min: 10 °C
Salinity Range During Event: Max: 20, Min: 9
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
Algae Saxitoxins 5-12 ng/ml water LC-MS
Kit used: Type of kit used:
Additional information:
Economic losses: Yes,
Management decision: GRIP 3 event, indication for high alert and action of all related parties.
Additional harmful effect information:
Created at 02:25 on 25 Mar 2015
Updated at 01:57 on 22 Feb 2018