| Event name: | NL-89-007 | |
| Country: | NETHERLANDS | |
|
Nature of the harmful event: |
High Phyto concentration | |
|
Event directly affected: |
Humans | |
| Toxicity detected: | No | |
| Associated syndrome: | ||
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (Phytoplankton Monitoring program. Rijkswaterstaat's North Sea Directorate.) | |
| Event occurred before in this location: | Yes (Phaeocystis occurred every year at the vertically mixed stations: The Walcheren transect, G6, the Noordwijk transect, Ts4, Ts10 and Ts235.) | |
| Individuals to contact: | WETSTEYN, L.P.M.J | |
| Location: | Latitude: , Longitude: | |
| General location information: |
North Sea, HAB Area code(s): NL-01 |
|
| Additional location information: | Cells were found at the walcheren transect G6, the Noordwijk transect Ts4, Ts10 and Ts135. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1989-04-01 Start: 1989-04-01, End: 1989-06-15 |
|
| Quarantine levels dates (yyyy/mm/dd): | First detection: 1989-04-01, End: 1989-06-15 | |
| Additional date-related information: | Estimated dates from April-June. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Phaeocystis sp.
(70,000,000 cells/L)
Noordwijk transect station. |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | The highest cell numbers (>10,000,000 cells/L) always occurred during April-June. Highest cell numbers at the stations Ts4 and Ts10 were between 20-60,000,000 cells/L. At station Ts235 the highest number was 3,000,000. | |
| Event-related bibliography: | ||
|
||||||||||||||||||||||||||
| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
|||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | Phaeocystis occurred every year at the vertically mixed stations: The Walcheren transect, G6, the Noordwijk transect, Ts4, Ts10 and Ts235. At the Stratified stations Ts100, Ts 135 and Ts 175 Phaecystis was (almost) never found. | |||||||||||||||||||||||||
|
|||||||
| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | No specific economic loss. However, Phaeocsysis is put on a high interest list of the authorities. Potential effects for tourism, and aquatic life are a concern. | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | |||||||
