Analysis of comprehensive long-term time series data from monitoring stations in Germany, Sweden, Denmark and Norway to assess whether Alexandrium pseudogonyaulax has established a sustained presence in Northern European waters. Published in Harmful Algae (2026).

The findings show that this species is now a recurrent part of the microalgal community, primarily in the Kattegat, Skagerrak, and southern Baltic Sea. Logistic regression revealed increasing trends in occurrence at several sites.