Harmful Algal Information System: Event US-98-008

General Information

Event name:	US-98-008
Country:	UNITED STATES
Nature of the harmful event:	Water Discoloration
Event directly affected:
Toxicity detected:	No
Associated syndrome:	OTHER
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (Normal spring and summer occurrences.)
Individuals to contact:	OLSEN, Paul

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Raritan - Sandy Hook Bay., New Jersey. HAB Area code(s): US-09
Additional location information:	Northern Monmouth County coast.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	May 19-27, 1998; June 17-24, 1998; July 24-30, 1998

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Rhizosolenia spp. ( cells/L) Skeletonema costatum ( cells/L) Thalassiosira spp. ( cells/L) (norduskioldii) Asterionella glacialis ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Total cell densities to 50,000,000 cells/L
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: 25 °C, Min: 0 °C

Salinity Range During Event:

Max: 28, Min: 19

Bloom location in the water column:

Growth:

Advected
In situ

Growth Comments

in situ growth, or advected from adjacent nearshore areas.

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:

Maintain current surveillance.

Additional harmful effect information:

Brown water; algal foams, floc Subsequent bottom hypoxia (1.2-2.7 mg/L - late summer, one to three miles off southern Monmouth - northern Ocean Co. (Belmar to Seaside), south of primary bloom area.