General Information

Event name: DE-98-002
Country: GERMANY
Nature of the harmful event:
Water Discoloration
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: Yes (Observed in most years, but patch size of water discolouration unusual large)
Individuals to contact: GÖBEL, Jeanette

Location & Date

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Location: Latitude: , Longitude:
General location information: Offshore from coast of Schleswig-Holstein., North Sea.
HAB Area code(s): DE-04
Additional location information: Lower Saxony coast and around Helgoland, Southern German Bight
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late April-Early May, again late August-Sept


Causative organism known: Yes
Causative Species/Genus: Noctiluca scintillans (1,000 cells/L)
beguinning of May
Phaeocystis globosa ( cells/L)
Late April-Early May
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: P. globosa started to form a bloom together with Noctiluca, but due to strong winds Phaeocystis did not reach high cell and colony densities
Event-related bibliography:

Environmental Conditions

Weather: Strong winds distributed the cells thereafter in the water column and only in late August-Spetember Noctiluca cused again water discolouration. 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 Unknown
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: None.
Additional harmful effect information: Discolouration of the sea surface, in some places several km, reddish water. Harmful effects have not been reported.
Updated at 04:41 on 15 Apr 2015