Harmful Algal Information System: Event DE-98-002

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:	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:

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:

Growth Comments

Unknown

Additional Environmental 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