Harmful Algal Information System: Event US-03-012

General Information

Event name:	US-03-012
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration , Other ( Water discoloration at times)
Event directly affected:
Toxicity detected:	No
Associated syndrome:
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	No
Event occurred before in this location:	Yes (This area frequently sees high concentrations of the species listed in Section 3 below; typical species and abundances over an annual cycle)
Individuals to contact:	RABALAIS, Nancy

Location:	Latitude: 30.060000, Longitude: -89.600000
General location information:	Lake Pontchartrain, lat/lon about mid-basin, Lousiana. HAB Area code(s): US-17
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	The species data listed in Section 3 below were compiled from a single station in the center of the lake, off the causeway bridge. Samples are collected monthly, do not know abundance between sample dates.

Causative organism known:	Yes
Causative Species/Genus:	Heterocapsa rotundata (133,000 cells/L) Data collected: 09/01/03 Heterocapsa rotundata (567,000 cells/L) Data collected: 12/02/03 Anabaena sp. (1,770,000 cells/L) Anabaena cf. Circinalis. Data collected: 22/07/03 Anabaena sp. (1,530,000 cells/L) Anabaena cf. Circinalis. Data collected: 13/08/03
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
Event-related bibliography: