Harmful Algal Information System: Event NL-01-001

General Information

Event name:	NL-01-001
Country:	NETHERLANDS
Nature of the harmful event:	High Phyto concentration , Mass mortalities
Event directly affected:	Shellfish
Toxicity detected:	No
Associated syndrome:	OTHER
Unexplained toxicity:
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

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Location:	Latitude: 51.658056, Longitude: 3.749444
General location information:	Hammen, Oosterscheldt HAB Area code(s): NL-03
Additional location information:
Bloom event dates (yyyy/mm/dd):	Event Date:2001-05-10 Start: 2011-04-22, End: 2011-05-13
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	No end,

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Phaeocystis globosa (76000000 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:	N
Stratified water:	No	Oxygen content (nL/L):		Wind velocity:
Temperature (°C):		Oxygen saturation %:		Current Direction:
Sechhi disk (m):		Salinity:	28	Current Velocity:

Nutrient information:

Temperature Range During Event:

Max: °C, Min: °C

Salinity Range During Event:

Max: 29.3, Min: 28

Bloom location in the water column:

Whole column

Growth:

Advected

Growth Comments

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:

High economic losses due to mortality in benthic mussel culture. These were associated with the Phaeocystis bloom, however proof was not given.

Management decision:

The mussel plots were temporarily closed, due to the potential of shellfish disease. Once analyses validated absence of disease the plots were re-opened.

Additional harmful effect information:

Created at 02:56 on 26 Mar 2015
Updated at 01:58 on 22 Feb 2018