| Event name: | US-20-011 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Water Discoloration , High Phyto concentration , Seafood toxins | |
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Event directly affected: |
Shellfish | |
| Toxicity detected: | No | |
| Associated syndrome: | OTHER | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (Rhode Island Dept. of Environmental Management HAB monitoring) | |
| Event occurred before in this location: | ||
| Individuals to contact: | BORKMAN, David | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Narragansett Bay and coastal salt ponds, Rhode Island HAB Area code(s): US-07 |
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| Additional location information: | Upper Narragansett Bay, Mt. Hope Bay, Lower East Passage of Narragansett Bay, Lower West Passage of Narragansett Bay, Greenwich Bay, Breton Reef, Quonochontaug Pond, Ninigret Pond | |
| Bloom event dates (yyyy/mm/dd): | Start: 2020-08-10, End: 2020-09-09 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Margalefidinium polykrikoides (Margalef, 1961) F.Gómez, Richlen & D.M.Anderson, 2017
(5,000,000 cells/L)
(9/3/2020 near Conimicut Point, Upper Narragansett Bay) |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Dense water discoloring patches of Margalefidinium at multiple locations in Narragansett Bay RI and coastal RI salt ponds from early August to early September 2020 | |
| Event-related bibliography: | ||
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
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| Bloom location in the water column: |
Surface |
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| Growth: |
In situ |
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | Numerous phone calls and emails from the general public; provided 'rust tide' fact sheet; no shellfish or beach closures | ||||||
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