Harmful Algal Information System: Event US-95-005

General Information

Event name:	US-95-005
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration
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 (1989:<130,000 cells/ml in Moriches Bay, <23,000 cells/ml in Shinnecock Bay. 1990: <1,000 to 960,000 cells/ml. 1991: <1,000 to >1,000,000 cells/ml. 1992: >1,000,000 cells/ml. 1993: up to 200,000 cells/ml. 1994: up to 38,000 cells/ml.)
Individuals to contact:	NUZZI, Robert

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Moriches and Shinnecock Bays., New York. HAB Area code(s): US-08
Additional location information:	The bloom was present throughout both bays, with highest concentrations in eastern Moriches Bay, Quantuck Bay, and western Shinnecock Bay.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	January - August in Moriches Bay (sampling was not continued after 8/23), and from January-October in Shinnecock Bay (sampling was terminated on 10/5).

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Aureococcus anophagefferens (<100,000,0 cells/L) late June to mid July.
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):		Salinity:	Current Velocity:	0

Nutrient information:

Temperature Range During Event:

Max: 28 °C, Min: 2 °C

Salinity Range During Event:

Max: 31, Min: 25

Bloom location in the water column:

Growth:

In situ

Growth Comments

Additional Environmental information:

Dissolved oxygen: 4.8-11 mg/l.

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:

Continue weekly monitoring program.

Additional harmful effect information:

Impacts on various shellfish species (scallops, hard clams and mussels) and on submerged aquatic vegetation (eelgrass) have previously been reported. Other effects are aesthetic - water discoloration and reduced transparency.