Harmful Algal Information System: Event US-01-004

General Information

Event name:	US-01-004
Country:	UNITED STATES
Nature of the harmful event:	Water Discoloration , 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:	Yes (California Department of Health Services Marine Biotoxin Monitoring Program.)
Event occurred before in this location:	Yes
Individuals to contact:	LANGLOIS, Gregg

Location:	Latitude: , Longitude:
General location information:	Marin County., California: Northern, Central. HAB Area code(s): US-21
Additional location information:	Highest relative abundances and cell masses observed inside Drakes Estero and Tomales Bay (Marin Co.) and at several southern California sites.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	Detection date: Ceratium spp. (primarily C. furca) became abundant in October im Marin, September at southern California sites where it replaced Gonyaulax polyedra. Bloom continued through October and into November at some sites.

Causative organism known:	Yes
Causative Species/Genus:	Ceratium furca ( cells/L) Ceratium spp. ( cells/L) Ceratium spp. (mostly C. furca). Qualitative assessment showed this species was abundant.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
Event-related bibliography:	Documented in our program's monthly/quarterly reports.