General Information

Event name: US-19-018
Nature of the harmful event:
Water Discoloration , High Phyto concentration
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 (FWC/FWRI HAB Monitoring Program and Saint John's River Water Management District)
Event occurred before in this location: Yes (2012-13, 2016-on)
Individuals to contact: HUBBARD, Katherine

Location & Date

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Location: Latitude: , Longitude:
General location information: Indian River Lagoon, East coast of Florida
HAB Area code(s): US-15
Additional location information: Time series monitoring indicates that A. lagunensis commonly occurs in IRL phytoplankton assemblages. Increased abundance was observed at the end of 2015 and by March 2016, this organism dominates a bloom that extends through much of the northern and cent
Bloom event dates (yyyy/mm/dd): Start: 2019-01-01, End: 2019-12-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Aureoumbra lagunensis (>200,000,000 cells/L)
mixed assemblage observed in some samples dominated by A. lagunensis
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: brown tide cannot be definitively identified by light microscopy so the actual count we produce refers to nanoplankton abundance (this is why a specific number is not provided)
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 04:44 on 8 Apr 2020
Updated at 10:10 on 8 Apr 2020