General Information

Event name: DK-95-001
Country: DENMARK
Nature of the harmful event:
High Phyto concentration
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

Location: Latitude: , Longitude:
General location information: ,
HAB Area code(s):
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: highest concentrations were found during spring and summer periods.

Microalgae

Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata ( cells/L)
high concentration
Prorocentrum minimum ( cells/L)
high concentration.
Prorocentrum micans ( cells/L)
high concentration.
Gymnodinium sanguineum ( cells/L)
high concentration
Alexandrium ostenfeldii ( cells/L)
low concentration
Alexandrium tamarense ( cells/L)
low concentration
Dinophysis norvegica ( cells/L)
low concentration
Dinophysis acuta ( cells/L)
low concentration
Dinophysis rotundata ( cells/L)
low concentration
Gyrodinium aureolum ( cells/L)
low concentration
Noctiluca scintillans ( cells/L)
low concentration
Pseudo-nitzschia delicatissima ( cells/L)
Low concentration.
Pseudo-nitzschia seriata ( cells/L)
Low concentration.
Phaeocystis pouchetii ( cells/L)
low concentration
Chrysochromulina spp. ( cells/L)
low concentration
Nodularia spumigena ( cells/L)
low concentration.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: During summer the biomasses were dominated by diatoms e.g. Rhizosolenia fragilissima and S. costatum and dinoflagellates P. minimum, P. micans and G. sanguineum.
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:
Growth Comments
Additional Environmental information: The high biomasses during the summer period were the result of high input of inorganic nutrients from the sediments as a result of oxygen deficiency in the calm and sunny summerperiod.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Harvesting of mussels were closed to restricted during several periods because of high concentrations of D. Acuminata and D. Norvegica. Figure 1 and 2.
Additional harmful effect information: No fishkills caused by HABīs were registred in 1995. DSP, PSP and ASP were not registered in 1995.
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES