| Event name: | US-99-011 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Water Discoloration , High Phyto concentration | |
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Event directly affected: |
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| 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 | |
| Individuals to contact: | MONCREIFF, Cynthia A. | |
| Location: | Latitude: 30.259367, Longitude: -89.216950 | |
| General location information: |
Coastal waters of Mississippi., Gulf of Mexico, Florida. HAB Area code(s): US-17 |
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| Additional location information: | Harrison and Jackson Counties in coastal Mississippi experienced blooms of this genus during the time frame indicated; location given is location from which sample with highest cell counts was collected. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1999-10-05 Start: 1999-09-14, End: 1999-10-14 |
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| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Highest cell count observed in Jackson County on 14/10/99. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Prorocentrum spp.
(2,000 - 18 cells/L)
Discolored water due to a Skeletonema costatum bloom; Prorocentrum species detected upon microscopic examination Prorocentrum micans ( cells/L) Prorocentrum scutellum ( cells/L) Prorocentrum gracile ( cells/L) Prorocentrum minimum ( cells/L) |
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| Co-Ocurring Species/Genus: |
Skeletonema costatum
( cells/L)
Cell count estimated to be "high" (in excess of 1,000,000 cells/L) due to discoloration of water |
|
| Chlorophyll concentration, if known: | Not performed. µg/l | |
| Additional bloom information: | Prorocentrum spp= P. micans, P. sutellum, P.gracile & P.minimum. A list of other genera of microalgae (predominantly diatoms) present in association with the bloom is available on request. Cysts: none observed. | |
| Event-related bibliography: | None. | |
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 27 °C, Min: 24 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 32, Min: 20 | |||||||||||||||||||||||||
| Bloom location in the water column: |
Whole column
Subsurface |
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| Growth: |
In situ |
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| Growth Comments | Assume 'in situ' growth. Prorocentrum reported to be benthic; species observed in phytoplankton may have been displaced from bottom. | |||||||||||||||||||||||||
| Additional Environmental information: | Winds during bloom period generally E to ENE at 5-10. Subsurface / throughout water column; water depth shallow (< 2 m). | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | None reported. | ||||||
| Management decision: | None taken. | ||||||
| Additional harmful effect information: | None reported. | ||||||
