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General Information

Event name: US-90-029
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: Sandy Hook Bay., New Jersey.
HAB Area code(s): US-09
Additional location information: Sandy Hook Bay, New Jersey, especially the south shore area; Shrewsbury River, especially in the vicinity of Branchport Creek tributary.
Bloom event dates (yyyy/mm/dd): Event Date:1990-08-02
Start: 1990-08-02,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Skeletonema costatum ( cells/L)
Thalassiosira nordenskioldii (> 20,000,0 cells/L)
Dominant species
Chaetoceros sp. ( cells/L)
Cyclotella sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Several other diatoms and phytoflagellate species present.
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:
Growth Comments Primarly an in-situ population. Diatoms possibly of neritic origin.
Additional Environmental information: Water turbid, flocculent, no other measurements taken.

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: Incresed surveillance by the Monmouth Conty Health Department in liaison with NJ DEP
Additional harmful effect information: Red to brown water in Sandy Hook Bay, Port Monmouth vicinity, in Shewsbury River at Sea Bright and Branchport Creek.
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES