| Event name: | US-95-006 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
High Phyto concentration , Mass mortalities | |
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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: | Yes | |
| Event occurred before in this location: | Yes (On our records from 1992-93, 1988-89, 1976, 1985, 1981 in the same general vicinity, within a 16 km segment from about Keyport to Atlantic Highlands.) | |
| Individuals to contact: | OLSEN, Paul | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Raritan Bay to Sandy Hook Bay., New Jersey. HAB Area code(s): US-09 |
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| Additional location information: | New Jersey-Hudson/Raritan estuary, southern portion (Raritan Bay to Sandy Hook Bay) and a few locales along the adjacent New Jersey oceanfront. | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Late May through June, mixed diatom blooms pervaded the area; 5-18 July, patchy but intense flagellate blooms occurred within the area. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Skeletonema costatum
( cells/L)
Thalassiosira gravida ( cells/L) Thalassiosira nordenskioldii ( cells/L) Cerataulina pelagica ( cells/L) Rhizosolenia delicatula ( cells/L) Olisthodiscus luteus ( cells/L) Katodinium rotundatum ( cells/L) Prorocentrum spp. ( cells/L) Eutreptia lanowii ( cells/L) |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Dominant diatoms: individual cell counts to 40,000 cells/ml, total counts >100,000 cells/ml. Dominant flagellates: individual counts to 20,000, totals to 50,000. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 30 °C, Min: 24 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | In-situ growth; some diatoms of neritic origin from adjacent New York Bight waters. | |||||||||||||||||||||||||
| Additional Environmental information: | Bottom dissolved oxygen as low as 0.4-1.1 mg/L at 2-4 m depth; night time surface dissolved oxygen as low as 0.28 mg/L at times and place of kills. | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | Response teams from NOAA (Sandy Hook), USEPA Region II, and Monmouth County Health Department, collected samples and field data ASAP after the kills; coordinated by New Jersey Department of Environmental Protection; routine surveillance increased. | ||||||
| Additional harmful effect information: | Fish kills are attributed to hypoxia from bloom collapse and consequent algal decomposition in the several weeks preceding kills. | ||||||
