General Information

Event name: UY-19-001
Country: URUGUAY
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Foam/Mucilage in the coast , Freshwater
Event directly affected:
Toxicity detected: Yes (Approximate range: Microcystin LR in recreational water)
Associated syndrome: Cyanobacterial toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes
Individuals to contact: MENDEZ, Silvia

Location & Date

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Location: Latitude: , Longitude:
General location information: Rio Uruguay and Rio de la Plata,
HAB Area code(s): UY-01 UY-02
Additional location information: 500 km shoreline affected by the bloom
Bloom event dates (yyyy/mm/dd): Event Date:2019-01-28
Start: 2019-01-28, End: 2019-04-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Microcystis aeruginosa (Kützing) Kützing 1846 ( cells/L)
scum because high densities
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: https://www.elobservador.com.uy/nota/cianobacterias-en-uruguay-donde-como-y-por-que-se-originan--2019131172159

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): 28 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 30 °C, Min: 28 °C
Salinity Range During Event: Max: 2, Min: 26
Bloom location in the water column:
Surface
Growth:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information: HPLC
Economic losses:
Management decision: Clossure of all the beaches affected by the bloom
Additional harmful effect information:
Created at 06:19 on 19 Aug 2019
Updated at 10:01 on 5 Dec 2019
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES