General Information

Event name: US-14-005
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Foam/Mucilage in the coast
Event directly affected:
Toxicity detected: Yes (Approximate range: Microcystin, up to 10ppb)
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Virginia Department of Health, HAB monitoring and lake survey)
Event occurred before in this location:
Individuals to contact: EGERTON, Todd

Location & Date

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Location: Latitude: 37.293333, Longitude:
General location information: Bear Creek Lake State Park and Twin Lakes State Park, Central Virginia
HAB Area code(s): US-10
Additional location information: Algal surface scum patches throughout lake, including within swimming beaches of state park
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2014-07-21, End: 2014-08-06
Additional date-related information: bloom said to be present several weeks before


Causative organism known: No
Causative Species/Genus: Planktothrix spp. (surface scums: >10 million cells/ml cells/L)
cyanobacteria. extremely dense surface scums. water column samples had ~10,000 cells/ml or less and ~1ppb or less microcystin
Co-Ocurring Species/Genus: Microcystis sp. (<1000 cell/ml cells/L)
Anabaena sp. (1000-10,000 cells/ml cells/L)
Planktolyngbya spp. (1000-10,000 cells/ml cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
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:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Planktothrix Microcystins 10ppb ELISA
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 07:03 on 8 Feb 2017