Harmful Algal Information System: Event US-07-009

General Information

Event name:	US-07-009
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration
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:
Individuals to contact:	RABALAIS, Nancy

Location:	Latitude: , Longitude:
General location information:	Atchafalaya River, Louisiana, Gulf of Mexico HAB Area code(s): US-17
Additional location information:	Cross-shelf research transect W of the mouth of the Atchafalaya River. Transect begins at 29.2733N/91.6167W and ends at 28.6917N/91.6167W
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	Species data below represent cell concentrations of HAB species from surface samples collected during routine sampling for the period January - December 2007 (sampling is every other month) and were not associated with a particular bloom event. Species are reported at 10^5 cells/liter, with the exception of Prorocentrum spp. and Dinophysis spp. which are reported at 10^3, and Alexandrium monilatum and Karenia spp. which are reported when they are detected at any concentration. Cell concentrations were averaged over the number of phytoplankton samples collected on any given date in hte transect to generate an average concentration for a single sample date.

Causative organism known:	Yes
Causative Species/Genus:	Prorocentrum scutellum (4.3x10^3 cells/L) 1/10/2007 Prorocentrum scutellum (1.09x10^4 cells/L) 3/20/2007 Prorocentrum compressum (2.21x10^4 cells/L) 3/20/2007 Pseudo-nitzschia spp. (1.8x10^5 cells/L) 3/20/2007 Pseudo-nitzschia spp. (1.05x10^6 cells/L) 5/12/2007 Alexandrium monilatum (2.58x10^3 cells/L) 9/11/2007 Prorocentrum gracile (1.01x10^3 cells/L) 9/11/2007 Prorocentrum scutellum (1.01x10^3 cells/L) 9/11/2007 Prorocentrum compressum (1.92x10^3 cells/L) 9/11/2007
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
Event-related bibliography: