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Causative organism known:
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Yes
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Causative Species/Genus:
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Gymnodinium breve
(5,000 cells/L)
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Co-Ocurring Species/Genus:
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Dinophysis caudata
( cells/L)
Prorocentrum spp.
( cells/L)
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Chlorophyll concentration, if known:
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µg/l
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Additional bloom information:
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Inshore waters east of Mississippi River: Exceeded 5,000 cells/L from Nov. 12, 1996 (start of sampling) to Dec. 4, 1996 with maximum abundance of 620,000 cells/L on 20/11/96. Inshore and shelf waters west of Mississippi River and east of 90º40'W. Ovserved
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Event-related bibliography:
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Weather:
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Turbidity (NTU):
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Wind direction:
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Stratified water:
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No |
Oxygen content (nL/L):
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Wind velocity:
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Temperature (°C):
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Oxygen saturation %:
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Current Direction:
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Sechhi disk (m):
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Salinity:
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Current Velocity:
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0
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Nutrient information:
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Temperature Range During Event:
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Max: °C, Min: °C
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Salinity Range During Event:
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Bloom location in the water column:
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Growth:
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Growth Comments
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There is no direct data at present to assess this question, but reported dates when Gymnodinium breve was present in Florida, Alabama, and Mississippi waters suggest advection from east was a factor. Growth must also have occurred to maintain such high nu
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Additional Environmental information:
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Occurred in nearshore and shelf waters between 5 and 34.5 ppt and 14.5 and 21ºC. Abundances above regulatory limits (>5,000 cells/L) occurred in Lousiana waters betwee 18 and 28 ppt, but data from Mississippi suggests a lower salinity (15 ppt).
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