Harmful Algal Information System: Event FR-90-007

General Information

Event name:	FR-90-007
Country:	FRANCE
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 (Alexandrium minutum: 1989 (3,000,000 cells/L))
Individuals to contact:

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Morlaix River, Northern Brittany. HAB Area code(s): FR-05
Additional location information:	Area 3.
Bloom event dates (yyyy/mm/dd):	Start: 1990-06-13, End: 1990-06-22
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Gonyaulax spinifera (2,300,000 cells/L) Alexandrium lusitanicum (2,500,000 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:	No	Oxygen content (nL/L):	Wind velocity:
Temperature (°C):		Oxygen saturation %:	Current Direction:
Sechhi disk (m):	2.5-3.5	Salinity:	Current Velocity:	0

Nutrient information:

Temperature Range During Event:

Max: 18 °C, Min: 15 °C

Salinity Range During Event:

Max: 32, Min: 22

Bloom location in the water column:

Growth:

Growth Comments

Probably in situ growth for Alexandrium minutum, which has developped in the river since 1989 (presence of systs in silt). No data for Gonyaulax spinifera.

Additional Environmental information: