Harmful Algal Information System: Event US-90-008

General Information

Event name:	US-90-008
Country:	UNITED STATES
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 (Chronic annual blooms.)
Individuals to contact:	OLSEN, Paul

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Raritan and Sandy Hook Bays., New Jersey. HAB Area code(s): US-09
Additional location information:	Raritan and Sandy Hook Bays (Staten Island to Sandy Hook), i.e., southern half of the Hudson-Raritan estuary.
Bloom event dates (yyyy/mm/dd):	Start: 1990-06-13, End: 1990-06-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Olisthodiscus luteus (15,000,000 cells/L) In eastern Sandy Hook Bay Cyclotella sp. (15,000,000 cells/L) In eastern Sandy Hook Bay Katodinium rotundatum (20,000,000 cells/L) Atlantic Highland Euglena sp. ( cells/L) Euglena/Eutrepia spp. Atlantic Highland Chlorella sp. ( cells/L) Atlantic Highland Cyclotella sp. ( cells/L) Atlantic Highland
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	And several other diatoms abundant.
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:

In situ

Growth Comments

Additional Environmental information:

Temperature range 22.5 to 23.2 C (surface), 20,5 to 22.3 C (bottom), slight stratification, salinity 21.9 to 24.0 � (surface), dissolved oxygen 3.36 to 9.9 mg/L (surface); 3.79 to 8.55 (botton).

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:

Joint surveillance by NJ DEP/US EPA: continuation of the estuarine phytoplankton - dissolved oxygen survey initiated in 1989; New York Bight and coastal monitoring by these agencies ongoing.

Additional harmful effect information:

a) Orange to red water in Sandy Hook Bay, locally intense at Atlantic Highlands (south shore);