| Event name: | NZ-81-001 | |
| Country: | NEW ZEALAND | |
|
Nature of the harmful event: |
High Phyto concentration , Foam/Mucilage in the coast | |
|
Event directly affected: |
Humans | |
| Toxicity detected: | No | |
| Associated syndrome: | ||
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | Yes (In the 1860s, 1901, 1960) | |
| Individuals to contact: | Hallegraeff Gustaaf | |
| Location: | Latitude: -41.045556, Longitude: 173.293056 | |
| General location information: |
Tasman Bay, South Island HAB Area code(s): NZ-07 |
|
| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): |
Event Date:1981-10-06 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gonyaulax turbynei Murray et Whitting 1899
( cells/L)
|
|
| Co-Ocurring Species/Genus: |
Gonyaulax sp.
( cells/L)
Gonyaulax hyalina Gymnodinium sp. ( cells/L) Phaeocystis pouchetii (Hariot) Lagerheim 1893 ( cells/L) |
|
| Chlorophyll concentration, if known: | 9.6 µg/l | |
| Additional bloom information: | In 1981, the most conspicuous species present were a variety of dinoflagellates, in particular the armored species G. hyalina and Gonyaulax turbinyei and an unarmored Gymnodinium sp. Although in hind sight it seems obvious that these organisms were most probably responsible for the mass accumulation of the mucilage, at the time it was thought that these dinoflagellates had been entrapped, like many other phytoplankton species and much detrital matte | |
| Event-related bibliography: | MacKenzie, L., Sims, I., Beuzenberg, V., & Gillespie, P. (2002). Mass accumulation of mucilage caused by dinoflagellate polysaccharide exudates in Tasman Bay, New Zealand. Harmful Algae, 1(1), 69-83. | |
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| Nutrient information: |
NITRATE:
7.1
PHOSPHATE: 0.6 DIN: 0.9 |
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Bloom reduced fish catches and severely affected the livelihood of fishermen. | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | Event called "Tasman Bay Slime" | ||||||
