Harmful Algal Information System: Event US-04-016

General Information

Event name:	US-04-016
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration
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.)
Individuals to contact:

Location:	Latitude: , Longitude:
General location information:	Lake Pontchartrain, Louisiana HAB Area code(s): US-17
Additional location 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. Concentrations of HAB species are reported at 10^5 cells/liter, with the exception of Prorocentrum which are reported at 10^4 and Anabaena spp. which are reported at 10^6. Data is from surface samples collected during routine sampling and were not associated with a particular bloom event.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Causative organism known:	Yes
Causative Species/Genus:	Heterocapsa rotundata (5,178,999 cells/L) Date collected: 1/26/2004 Heterocapsa rotundata (437,465 cells/L) Date collected: 3/9/2004 Mesodinium rubrum (171,509 cells/L) Date collected: 3/9/2004 Prorocentrum minimum (279,073 cells/L) Date collected: 10/20/2004 Heterocapsa rotundata (494,034 cells/L) Date collected: 12/8/2004
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	heterocapsa rotundata
Event-related bibliography: