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General Information

Event name: US-03-013
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 & Date

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Location: Latitude: 29.400000, Longitude: -90.250000
General location information: Lake Salvador, lat/lon about mid basin, Lousiana.
HAB Area code(s): US-17
Additional location information: Very low salinity lake.
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 several station locations in the lake, on a monthly basis. Do not know abundances between sample dates.

Microalgae

Causative organism known: Yes
Causative Species/Genus: Anabaena sp. (1,820,000 cells/L)
Anabaena cf. Circinalis. Data collected: 15/04/03
Anabaena sp. (13,100,000 cells/L)
Anabaena cf. Circinalis. Data collected: 28/04/03
Heterocapsa rotundata (1,790,000 cells/L)
Date collected: 22/05/03
Raphidiopsis curvata (122,000 cells/L)
Date collected: 22/05/03
Heterocapsa rotundata (260,000 cells/L)
Date collected:10/06/03
Mesodinium rubrum (162,000 cells/L)
Ciliate. Date collected: 23/06/03
Cylindrospermopsis raciborskii (8,710,000 cells/L)
Date collected: 23/06/03
Raphidiopsis curvata (339,000 cells/L)
Date collected: 23/06/03
Raphidiopsis curvata (417,000 cells/L)
Date collected: 21/07/03
Anabaena sp. (1,790,000 cells/L)
Anabaena cf. Circinalis. Data collected: 20/08/03
Anabaena sp. (1,020,000 cells/L)
Anabaena cf. Circinalis. Data collected: 26/08/03
Cylindrospermopsis raciborskii (475,000 cells/L)
Date collected: 26/08/03
Raphidiopsis curvata (259,000 cells/L)
Date collected: 26/08/03
Anabaena sp. (1,260,000 cells/L)
Anabaena cf. Circinalis. Data collected: 26/08/03
Raphidiopsis curvata (569,000 cells/L)
Date collected: 16/09/03
Mesodinium rubrum (124,000 cells/L)
Ciliate. Date collected: 09/10/03
Cylindrospermopsis raciborskii (952,000 cells/L)
Date collected: 09/10/03
Raphidiopsis curvata (204,000 cells/L)
Date collected: 09/10/03
Heterocapsa rotundata (106,000 cells/L)
Date collected: 16/10/03
Raphidiopsis curvata (104,000 cells/L)
Date collected: 05/11/03
Cylindrospermopsis raciborskii (862,000 cells/L)
Date collected: 05/11/03
Raphidiopsis curvata (119,000 cells/L)
Date collected: 12/12/03
Anabaena sp. (1,560,000 cells/L)
Anabaena cf. Circinalis. Data collected: 12/12/03
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: Chlorophyll concentration: data available for µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Surface
Growth:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: