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Phytoplankton, toxic algae and zooplankton in the estuary and Gulf of St.Lawrence

Green phytoplankton pictogramGreen toxic algae pictogramYellow zooplankton pictogram


A close to 20 years monitoring of the phytoplankton and zooplankton community of the St. Lawrence estuary and Gulf shows that their global state remained fairly stable for the 2013-2017 period. If the biomass and the composition of the phytoplankton are highly variable, they did not show signs of anomalies for the most recent period. On the other side, zooplankton biomasses decreased slightly and its composition is changing, which could have impacts on the food web. On the toxic algae bloom side, there was a slight decrease in the last four years.  

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