General Information

Event name: CN-01-007
Country: CHINA
Nature of the harmful event:
Water Discoloration , 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 (China Red Tide Monitoring Programme)
Event occurred before in this location: Yes (This bloom has been initiated in this area in June since 1996)
Individuals to contact: WANG, Jinhui

Location & Date

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Location: Latitude: , Longitude:
General location information: Changjiang Estuary, Zhejiang province and Shanghai Municiple
HAB Area code(s): CN-07
Additional location information: the coverage of bloom is about 1000 Km2, important fishery area. 31.37 šN; 122.63 šE.
Bloom event dates (yyyy/mm/dd): Event Date:2001-05-11
Start: 2001-05-10, End: 2001-05-17
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: 15 km2 algal bloom in Changjiang estuary(30.49N,124.15E) during 15~16 April,Another 60 km2 algal bloom in Changjiang estuary(31N,122.63~122.75E) on 22 May


Causative organism known: Yes
Causative Species/Genus: Prorocentrum dentatum (3,100,000 cells/L)
monospecific bloom
Co-Ocurring Species/Genus: Alexandrium sp. ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: More details in China Marine Disaster Bulletin

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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 05:53 on 9 Jan 2013