General Information

Event name: DK-98-001
Country: DENMARK
Nature of the harmful event:
High Phyto concentration , Other ( This file summarizes the phytoplankton situation in Danish coastal waters and fjords in 1998. No algal toxins were observed in 1998.)
Event directly affected:
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: No
Individuals to contact: ANDERSEN, Per

Location & Date

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Location: Latitude: , Longitude:
General location information: ,
HAB Area code(s): DK-04
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: In spring and summer.


Causative organism known: Yes
Causative Species/Genus: Prorocentrum sp. ( cells/L)
Prorocentrum cf. Triestinum. High concentrations.
Chrysochromulina spp. ( cells/L)
Low concentrations
Phaeocystis pouchetii ( cells/L)
Low concentrations
Dictyocha speculum ( cells/L)
Low concentrations
Pseudo-nitzschia seriata ( cells/L)
Low concentrations
Pseudo-nitzschia delicatissima ( cells/L)
Low concentrations.
Noctiluca scintillans ( cells/L)
Low concentrations.
Gymnodinium sanguineum ( cells/L)
Low concentrations
Prorocentrum lima ( cells/L)
Low concentrations.
Dinophysis rotundata ( cells/L)
Low concentrations
Dinophysis acuta ( cells/L)
Low concentrations
Dinophysis norvegica ( cells/L)
Low concentrations
Dinophysis acuminata ( cells/L)
Low concentrations
Alexandrium tamarense ( cells/L)
Low concentrations
Alexandrium ostenfeldii ( cells/L)
Low concentrations
Alexandrium minutum ( cells/L)
Low concentrations
Prorocentrum minimum ( cells/L)
High concentration.
Skeletonema costatum ( cells/L)
High concentration
Prorocentrum micans ( cells/L)
High concentrations.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The phytoplankton in Danish coastal waters and fjords in 1998 was characterized by relatively low concentrations and biomasses in the spring and most of the summer period. In the summer the biomasses were dominated by diatoms e.g., Skeletonema costatum
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: The low biomasses during summer period were primarely the result of low input of inorganis nutrients from land, caused by low run-off during spring and summer.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Intensified monitoring and/or closing of shellfishery due to concentrations of Dinophysis acuminata, Dinophysis norvegica, Alexandrium species and Pseudonitzschia species exceeding the concentrations in the veterinary guidelines, were imposed at several o
Additional harmful effect information: No algal toxins were registered in shellfish in 1998 and there are no reports of human intoxications caused by consumption of Danish shellfish in 1998.
Updated at 05:26 on 8 Sep 2019