General Information

Event name: US-09-015
Nature of the harmful event:
Water Discoloration , 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 (Suffolk County Dept. of Health Services for the South Shore Estuary Reserve Program)
Event occurred before in this location: Yes (recurring bloom from 1986 to 2002)
Individuals to contact: BLASI, Philip de

Location & Date

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Location: Latitude: , Longitude:
General location information: Suffolk County, New York, South Shore of Long Island
HAB Area code(s): US-08
Additional location information: Western-Eastern Shinnecock Bay, South Shore Estuary
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: May to November


Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (1,359,450 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Sunny Turbidity (NTU): Wind direction: SW
Stratified water: No Oxygen content (nL/L): 7.4 Wind velocity: 10-15 mph
Temperature (°C): 23.8 Oxygen saturation %: Current Direction:
Sechhi disk (m): 1.5 Salinity: 25.9 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 25.5 °C, Min: 5.3 °C
Salinity Range During Event: Max: 31.8, Min: 25.8
Bloom location in the water column: Whole column
In situ
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: Historically has caused loss of scallop fishery in other embayments (Peconic Estuary) and decimation of eelgrass beds.
Management decision:
Additional harmful effect information: