General Information

Event name: DE-90-005
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: No
Individuals to contact: LENZ, Jürgen

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Helgoland Island., North Sea.
HAB Area code(s): DE-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1990-08-29
Start: 1990-08-01, End: 1990-08-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: The bloom developed in the second half of august.


Causative organism known: Yes
Causative Species/Genus: Lepidodinium viride (6,500,000 cells/L)
Averaged cell counts on 29 August
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: A survey from the North Frisian coast to the µg/l
Additional bloom information: The bloom was caused by a green Gymnodinium which is propably identical with the new species first described for Japanese waters by Watanabe et al. 1987 as Y-100 and now named L. viride (Watanabe et al. 1990, Fig 14 see complementary info). In surface sam
Event-related bibliography:

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: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: