General Information

Event name: US-88-009
Nature of the harmful event:
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (1985, 1986, 1987 (brown water blooms))
Individuals to contact: OLSEN, Paul

Location & Date

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Location: Latitude: , Longitude:
General location information: Barnegat Bay, New Jersey,
HAB Area code(s): US-01
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Mid July - late September


Causative organism known: Yes
Causative Species/Genus: Nannochloris atomus ( cells/L)
presumptive identification
Co-Ocurring Species/Genus: Aureococcus anophagefferens ( cells/L)
< 7.5%
Chlorophyll concentration, if known: µg/l
Additional bloom information: Total picoplankton 105 - 106 cells ml"1 Chlorophyll North end 12 g 1(-1) Chlorophyll South end 24 g 1(-1)
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 27 °C, Min: 22 °C
Salinity Range During Event: Max: 27, Min: 20
Bloom location in the water column:
Growth Comments In situ (?). N. atomus present for at least 20 years A. anophagefferens, unknown origin
Additional Environmental information: Water column mixed

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: Increased surveillance
Additional harmful effect information: Brownish water discoloration. Large mats of dead eel grass on shores, coincident with brown water.