General Information

Event name: US-11-029
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (SCDHS for South Shore Estuary Reserve Program)
Event occurred before in this location: Yes (recurring bloom from 1986 to 2002, 2007 to 2011)
Individuals to contact: BLASI, Philip de

Location & Date

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Location: Latitude: , Longitude:
General location information: Suffolk County, New York, Soth SHore Estuary, Moriches Bay
HAB Area code(s): US-08
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (2,767,236 cells/L)
At station 080190 in Moriches Bay on 6-16-11
Aureococcus anophagefferens (1,700,391 cells/L)
Shinnecock Bay on 6/15/11
Co-Ocurring Species/Genus: Aureococcus anophagefferens (889,685 cells/L)
Great South Bay on 10/18/11
Chlorophyll concentration, if known: 36.2 µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Partly cloudy Turbidity (NTU): Wind direction: S
Stratified water: Yes Oxygen content (nL/L): 10.2 Wind velocity: 0-5 mph
Temperature (°C): 22.3 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 27.7 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 26.4 °C, Min: 10.1 °C
Salinity Range During Event: Max: 30.5, Min: 25.4
Bloom location in the water column: Whole column
Growth Comments
Additional Environmental information: WIthin the periods of bloom (June 16-29, Sept 29- Nov 3, 2011) D.O. ranged from 6.5 to 10.2 mL/L and secchi depths ranged from 1.0 to 13.0

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:
Management decision:
Additional harmful effect information:
Created at 06:37 on 25 Jun 2012
Updated at 02:57 on 29 Apr 2020