Harmful Algal Information System: Event US-94-009

General Information

Event name:	US-94-009
Country:	UNITED STATES
Nature of the harmful event:	Water Discoloration
Event directly affected:
Toxicity detected:	No
Associated syndrome:	OTHER
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (Heavy localized blooms of this nature are not uncommon in this location, which lacks flushing and receiver concentrated runoff from surrounding sububrban areas.)
Individuals to contact:	OLSEN, Paul

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Oceanport Creek-Branchport Creek., New Jersey. HAB Area code(s): US-09
Additional location information:	Oceanport Creek-Branchport Creek, tributary to Sandy Hook Bay via the Shrewsbury River.
Bloom event dates (yyyy/mm/dd):	Event Date:1998-09-13
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	8 August, 3 September, 21 November.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Navicula sp. ( cells/L) 8 August. Chaetoceros spp. ( cells/L) 8 August Prorocentrum minimum ( cells/L) dominant. Prorocentrum redfieldii ( cells/L) Polykrikos kofoidii ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Maximum cell counts of the dominant > 50,000,000 cells/L.
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:

In situ

Growth Comments

Additional Environmental information:

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:

Investigation by Monmouth County Health Department.

Additional harmful effect information:

Effects: Intense brown to tea-colored water discoloration; presence of floc from algal decomposition. Numerous dead killies and other dead fish on 13 September.